In a Schering bridge the potential of the detector above earth potential is, 26. For example, the shaft rotation might represent an angle, and the voltage division ratio can be made proportional to the cosine of the angle. To avoid the effect of stray magnetic field in A.C. bridges we can use, 27. A potentiometer may be used for a) measurement of resistance b) measurement of current c) calibration of ammeter d) calibration of voltmeter e) all of the above An induction meter can handle current up to, 5. These were used for precision comparison of voltages and also were often used to accurately measure such voltages as the small values coming from a thermocouple. Which of the following devices should be used for accurate measurement of low D.C. voltage ? Potentiometer (POT) Definition: The instrument designs for measuring the unknown voltage by comparing it with the known voltage, such type of instrument is known as the potentiometer. So the value shown in the voltmeter may not be accurate. We also performed tests to determine how measurements may be affect-ed by changing environmental humidity. Only the balance is only minimum. For example, investigate a mechanical change (leverage / gearing) to increase the movement used for measurement; or look at other measurement options (e.g. Suppose we consider a potentiometer with a resistance of 4 k V and let R s be 2 k V.Then for 1 mV per degree we have 0.01 5 1 320 4 V s 4 1 2 Hence we would need a supply voltage of 4.8 V. To prevent loading of the potentiometer by the resistance of the recorder, a voltage follower circuit can be used. And also it is used to compare the EMFs of different cells. In other words, the potentiometer is the three terminal device used for measuring the potential differences by manually varying the resistances. Potentiometer techniques may also be used for current measurement, the unknown current being sent through a known resistance and the IR drop opposed by balancing it at the voltage terminals of the potentiometer. When a cell of 1×5 V emf is used in the secondary circuit, the balance point is found to be 60 cm. This wire is one meter long and it is stretched between two terminals. 3.2.2 Application of D.C potentiometer As we have discussed that the D.C. potentiometers are mostly used for the measurement of the small emfs so these potentiometers are usual basic for calibration of all voltmeter’s ammeters and wattmeters. b. Angular displacement . 22. The key difference between pH meter and potentiometer is that the pH meter measures the hydrogen ion activity in aqueous solutions, whereas the potentiometer measures the voltage by comparing an unknown voltage to a known voltage.. pH meter is often used in chemical analysis for the measurement of pH of water-based solutions. Resistor, a small bundle of resistance, is one of the most used basic components in an electric circuit. E.m.f. In the figure below you can see some examples of potentiometers. A potentiometer is helpful in such common tasks as adjusting the volume level on a radio, or changing channels on some types of television sets. There is a precision device (not just some crude contraption) also called a potentiometer, which was once upon a time used for accurately measuring unknown voltages. Linear displacement . A pot is a manually adjustable variable resistor with three terminals. In a portable instrument, the controlling torque is provided by, (a) should be mounted in vertical position, (b) should be mounted in horizontal position, 10. a. A potentiometer is also used to measure the electromotive force of a cell. A potentiometer is a variable resistor mechanically used to measure the difference of electrical potential between two electrical terminals. (a) Small range moving coil voltmeter, 16. This wire is connected with Rheostat in series. A potentiometer may be used for (a) measurement of resistance (b) measurement of current (c) calibration of ammeter (d) calibration of voltmeter (e) all of the above Ans: e. 21 is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another, (a) Tangent galvanometer (b) Meggar (c) Current transformer (d) None of the above Ans: b. Multiple Choice Questions (MCQ) on Transformer for Electrical Engineering In This Post, we are going to share Multiple Choice Questions ... ElectricalNotes4u is a Blog for Electrical Engineering Students who want to learn Electrical Engineering online. The potentiometer can be used for the measurement of translational as well as well rotational displacement. The function of shunt in an ammeter is to, (b) increase the sensitivity of the ammeter, 11. For handling greater currents induction wattmeters are used in conjunction with, 7. Also known as a Potmeter or Pot, it consists of a resistive element called the track and a sliding contact called the wiper internally where end terminals are attached to the resistive element. Linear taper potentiometers are commonly used for measurement of distance or angle. The Potentiometer is an electric instrument used to measure the EMF (electromotive force) of a given cell, the internal resistance of a cell. of a battery. Measuring the voltage across a branch of a circuit A single measurement components may have both random errors and systematic errors A measurement system consists of several components with each component having separate errors Both the statement (1) & (2) are true measurement when the potentiometer is held in a given position for long periods (>102 hr). But in the presence of harmonics in one or both of the voltages being compared the balance point may not be the same. Potentiometer is a 3 terminal device used to vary the resistance in any circuit. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. The turns of the coil are bonded together by an adhesive. In an energy meter braking torque is produced to, (d) maintain steady speed and equal to driving torque, 48. Potentiometry by ISEs is primarily used for the measurement of ‘grouped’ (free) calcium ions and not of total calcium concentration. In an AC. d. Only (1) and (2) e. All the above. Potentiometers are used in knobs and sliders, such as those on this sound editing equipment. Further practical details have been given by Tyler (1972) and Hughes (1977). Potentiometer techniques may also be used for current measurement, the unknown current being sent through a known resistance and the IR drop opposed by balancing it at the voltage terminals of the potentiometer. The circuit can be readily adapted for comparing resistances, for calibrating ammeters and voltmeters measuring both high and low EMFs and for determining the internal resistance of a cell. Q. Potentiometer is used for the measurement of. A potentiometer is also used for the measurement of voltage across a resistive element of a circuit. Measuring the internal resistance of a battery cell 3. b. Angular displacement . A potentiometer also referred to as pot may come in a wide variety of shapes and are used in many applications in your daily life, for example to control the audio volume of the radio. We will Provide You Notes on all Major subject of electrical engineering. It is defined as a three-terminal resistor having either sliding or rotating contact that forms an adjustable voltage divider. However, they may also be used for measurement of current power and resistance. Potentiometer techniques may also be used for current measurement, the unknown current being sent through a known resistance and the IR drop opposed by balancing it at the voltage terminals of the potentiometer. You may find that a single-turn (“3/4 turn”) potentiometer is too coarse of an adjustment device to accurately “null” the measurement circuit. When used with calibrated standard resistors, a potentiometer can be employed to measure current, power, and other electrical quantites; when used with the appropriate measuring transducer, it can be used to gauge various nonelectrical quantities, such as … The potentiometer is the electrical type of transducer or sensor and it is of resistive type because it works on the principle of change of resistance of the wire with its length. The potentiometer is very useful for measuring the terminal voltages of batteries. A potentiometer may be used for_____? of a Weston cell is accurately measured by, 45. A potentiometer is a resistor with a sliding contact, the position of which can be varied. Tolerance may be listed on the device but not always. Q. Potentiometer is used for the measurement of. When a potentiometer is used as a rheostat, the “unused” terminal is often connected to the wiper terminal, like this: At first, this seems rather pointless, as it has no impact on resistance control. This tutorial will explain how to measure resistance of the potentiometer through at digital multimeter for its accurate value. co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be, 24. But there is one major difference between their measurements, DC potentiometer only measures the magnitude of the unknown voltage. In the second case, it is connected at a point C and zero deflection is observed at a length 30 cm from P. ... asked May 15, 2019 in Physics by RenuK (68.1k points) jee mains 2019; \$\begingroup\$ @AACES - Hi, I recommend you take a step back & consider other options as well, if you are only considering using a potentiometer rotating 2 degrees. A potentiometer is used to measure the potential difference in a circuit. Statement -1 : A potentiometer of longer length is used for accurate measurement
Statement -2 : The potential gradient for a potentiometer of longer length with a given source of e.m.f becomes small A voltage of about 200 V can be measured, (b) a D.C. potentiometer in conjunction with a volt ratio box, (c) a D.C. potentiometer in conjunction with a known resistance, (b) a D.C. potentiometer in conjunction with a standard resistance, (c) a D.C. potentiometer in conjunction with a volt ratio box, 19. It can also use as a variable resistor in most of applications. Trim pots are directly mounted onto circuit boards and can be set horizontally or vertically and can operate on a single or multi-turn basis. • .PDF edition of Carl David Todd (ed), "The Potentiometer Handbook",McGraw Hill, New York 1975 ISBN 0-07-006690-6 1) Wire wound potentiometers: This potentiometer comprises of several rounds of wire wound around the shaft of the non-conducting material. A. measurement of resistance B. measurement of current C. calibration of ammeter D. calibration of voltmeter E. all of the above. Potentiometers, or pots, are a type of resistor used to control the output signal on an electronic device, like a guitar, amplifier, or speaker. Assertion: A potentiometer of longer length is used for accurate measurement. The potentiometer is also called as pots and it one of the most commonly used devise for measuring the displacement of the body. What is Potentiometer – Diagram , Working , Advantages What is Potentiometer. There will be several options in speed controls. In a Weston frequency meter, the magnetic axes of the two fixed coils are, 36. A potentiometer is an instrument which measures unknown voltage by balancing it with a known voltage.The known source may be DC or AC. To measure radio frequency, the suitable frequency meter is, #MCQ on Measurement and Instrumentation for Electrical Engineering, #Measurement and Instrumentation questions and answers, #electrical engineering mcq question answer, #Electrical Measurement and Instrumentation objective questions, Multiple Choice Questions(MCQ) on Magnetism. Wagner earthing device is used to eliminate errors due to, 25. © Copyright 2020. Play this game to review Circuits. As you can see in the image below, a shaft is attached with it to vary the resistance. Before the introduction of the moving coil and digital volt meters, potentiometers were used in measuring voltage, hence the '-meter' part of their name.The method was described by Johann Christian Poggendorff around 1841 and became a standard laboratory measuring technique. Mostly used to regulate the current flow by adding/subtracting resistance from the circuit, these resistors are available in many shapes and sizes. What is the use of a potentiometer and could you explain its working (as level physics) Asked Zoha Answer: The potentiometer is mainly used for, To compare the emfs of two primary cells To determine the internal resistance of a primary cell To determine the value of a high resistance To determine the emf of … Continue reading → Other Applications – The AC potentiometer is used for engineering measurement in which the accuracy of 0.5 to 1% is essentials. Reason: The potential gradient for a potentiometer of longer length with a given source of e.m.f become small. The reading you get should not be outside of that range (e.g. a 10,000 ohm device rated 5% should read between 9500-10500 ohms). Potentiometer is a primary sensor which converts the linear motion or the angular motion of a shaft into change in resistance. Potentiometers can also come in lots of other subtle variations – pots with “logarithmic” position-to-resistance functions are often used in audio volume controls, “multi-gang” pots have several isolated potentiometers controlled by one shaft. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND … A potentiometer is an instrument for measuring voltage or 'potential difference' by comparison of an unknown voltage with a known reference voltage. 1. Damping of the Ballistic galvanometer is made small to, 42. MCQ on Measurement and Instrumentation for Electrical Engineering, 30 Most Asked Objective Questions or MCQ on Magnetism and Electromagnetism for Electrical Engineering, 17 Most Asked Objective Questions or MCQ on Network Theorems for Electrical Engineering, [TOP] Most Asked Objective Questions or MCQ on Transformer for Electrical Engineering. Wattmeter cannot be designed on the principle of, 47. There is a voltage measurement instrument that was used many years ago called a “Potentiometer”. In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at, 32. A potentiometer can be used for super precise input, down to the mV level, for motor speed control and for projects where precision is key. ... ”A measure of the sensitivity to which the output ratio of the potentiometer may be set”. The internal resistance of the cell can also be calculated by a potentiometer. Velocity and acceleration can be obtained by differentiation. The rectifier instrument is not free from, 46. In its simplest configuration, a potentiometer may be used as a rheostat by simply using the wiper terminal and one of the other terminals, the third terminal left unconnected and unused: Moving the potentiometer control in the direction that brings the wiper closest to the other used terminal results in a lower resistance. If connected to a known potential V, a potentiometer may be used to measure an unknown potential, as shown in Fig. A multi-turn potentiometer may be used instead of the single-turn unit for greater adjustment precision, or the “precision potentiometer” circuit described in an earlier experiment may be used. Question is ⇒ A potentiometer may be used for, Options are ⇒ (A) measurement of resistance, (B) measurement of current, (C) calibration of ainmeter, (D) calibration of voltmeter, (E) all of the above, Leave your comments or Download question paper. Whether circuit may be AC. It gives the accurate results in magnetic testing and precise testing of instrument transformers. The pressure coil of a wattmeter should be connected on the supply side of the current coil when (a) load impedance is high, 12. The ion-selective membrane of the … It is required to measure the true open circuit e.m.f. A potentiometer wire of length 1 m is connected to a driver cell of emf 3 V as shown in the figure. In order to use the potentiometer as a rheostat or variable resistor, it should have only two terminals with one end and the wiper. In Weston synchronoscope, the moving coil is connected across, 37. To measure a resistance with the help of a potentiometer it is, (a) necessary to standardise the potentiometer, (b) not necessary to standardise the potentiometer, (c) necessary to use a volt ratio box in conjunction with the potentiometer, 20. These devices typically have a tolerance of 5-10%. They are also commonly used for voltage division. TE Connectivity (TE) manufactures various types of potentiometers including linear potentiometers, rotary sensors and encoders, and cable actuated position sensors called string pots. As you can see in the image below, a shaft is attached with it to vary the resistance. Linear displacement . The galvanometer is first connected at point A and zero-deflection is observed at length PJ = 10 cm. Multiple Choice Questions(MCQ) on Network Theorem 1. A potentiometer is a circuit that is used to measure EMF of a cell. A trimmer potentiometer, or trim pot, is a small potentiometer that is used for adjusting and calibrating circuits in order to provide an exact output voltage or current. In a potentiometer wire experiment, the emf of a battery in the primary circuit is 2 0 V and its internal resistance is 5 Ω. 7. The two pressure coils of a single phase power factor meter have, (a) the same dimensions and the same number of turns, (b) the same dimension but different number of turns, (c) the same number of turns but different dimensions, 30. They have a small shaft on top that functions like a knob; when the user turns the shaft, it turns the resistance on the signal up or down. Template:Ref improve A potentiometer is an instrument for measuring the potential (voltage) in a circuit. According to application, instruments are classified as, 2. A _____ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly, 3. c. Non - linear displacement. the circuit is as shown: A battery of known emf ##epsilon## is connected with the end terminals A and B of potentiometer with rheostat ##R_h## ammeter resistance box and key K all in series. The main function of the potentiometer is to provide variable voltage to different electrical and electronics devices and circuits. Comparing the emf of a battery cell with a standard cell 2. measurethesmallremainder,whichmaybeoftheorderof1per cent of the total. Circuit for the measurement of resistance by potentiometer is shown. In this case the slider, connected to the body whose displacement is to be measured, moves on the potentiometer track and it makes contacts with successive turns of the coil. (A) a (B) b (C) c (D) d Mcq Added by: Muhammad Bilal Khattak. In principle a variable resistor may be used in two different ways with respect to the load: As a parallel resistor, i.e., a voltage divider or potentiometer, and a series resistor or rheostat, i.e., a type of current regulator. Resistance of the potentiometer wire is 7 5 Ω. d. Only (1) and (2) e. All the above. In a single phase power factor meter the phase difference between the currents in the two pressure coils is, 31. In majority of instruments, damping is provided by, 8. In order to achieve high accuracy, the slide wire of a potentiometer should be, 21. Fig. To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken, (a) from a source which is not the same as the unknown voltage, (c) from the same source as the unknown voltage, 22. It worked by comparing the unknown voltage to a known DC reference voltage in a bridge circuit, using a precision voltage divider. optical encoder) more suitable for measuring small movements. It can also be used to find the emf of a cell and also to compare the emf of two cells. The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a, 23. For this device, only two are used (the middle one and one of the ends). A DC Potentiometer is used for the measurement of EMF’s of different cells and for calibrating the voltmeters, ammeters, wattmeters etc. 3 An electrical signal proportional to the angular position of a joint can be produced, for example, by a device incorporating a potentiometer with its axis aligned to the center of the joint. The three main applications of a potentiometer are: 1. A potentiometer is an instrument for measuring the potential (voltage) in a circuit. The armature current of the synchronous ... For frequencies above the resonant frequ... An OR gate has 6 inputs. The RGB LED in each breakout can be used … In a low power factor wattmeter the pressure coil is connected, (a) to the supply side of the current coil, (c) in any of the two meters at connection, 13. The position of the contact is adjusted until the galvanometer registers no current flow. Measurement and Instrumentation Measurement and Instrumentation. A motor-driven potentiometer may be used as a function generator, using a non-linear resistance card to supply approximations to trigonometric functions. No explanation is available for this question! The best device is, 17. These potentiometers consist of a germen silver or manganin wire. A potentiometer is a device which is used to measure potential difference across a component. Before the introduction of the moving coil and digital volt meters, potentiometers were used in measuring voltage, hence the '-meter' part of their name.The method was described by Johann Christian Poggendorff around 1841 and became a standard laboratory measuring technique. So for better accuracy we can use potentiometer as the potentiometer does not draw any current from the circuit and hence gives an accurate value. Since these potentiometers work on the principle of resistance, they are also called as the resistive potentiometers. This can be done by the comparing the unknown resistance with the standard resistance. a. This tutorial will explain how to measure resistance of the potentiometer through at digital multimeter for its accurate value. The ratio of maximum displacement deviation to full scale deviation of the instrument is called (a) static sensitivity, 40. The AC potentiometer is also used for measuring the voltage which must be resolved into two components. A direct measurement of movement can be made by recording the angular changes at joints. The potentiometer is used as the cold junction, and its temperature is estimated to be 83 F. Calculate the emf indicated by the potentiometer. Typical values for independent linearity nowadays lie between 0.2 % and 0.02 %. A potentiometer sensor measures the absolute distance or displacement of an object in a linear or rotary motion and converts it into an electrical signal. potentiometer is also called linear position sensors or resistors ruler and it is one of the most commonly used devise for measuring the displacement. ANSWER: Only (1) and (2) Answer & Explanation « Previous; Next » Related Content. deflectionpotentiometer,properlysocalled,anunbalancedpartofthe unknown emf occasionstheobserved deflectionof the indicating instrument, which is directlyin the measurement circuit. 1 For example, if an electromotive force is between no and in volts, thepotentiometer method may be used to Important Performance Parameters of the Potentiometers Presently the most common use I think would be as a component of a solid state motor speed control. Thus the circuit might be of the form shown in Figure 6.28. Fig. The actual reading may not be exactly what the potentiometer is rated for. Nowadays lie between 0.2 % and 0.02 % to which the accuracy 0.5. Weston frequency meter, the slide wire of length 1 m is connected across, 37 a precision voltage.... A manually adjustable variable resistor with a known DC reference voltage in a circuit is an for. Compared the balance point may not be exactly what the potentiometer through at digital multimeter for its value! Sensor which converts the linear motion or the angular motion of a battery cell 3 d ) by making springs! An unknown potential, as shown in the image below, a small bundle of is... The coil are bonded together by an adhesive component of a germen silver or manganin wire a circuit speed.! No current flow by adding/subtracting resistance from the source of A.C. supply is as... Phase power factor meter the natural frequencies of two cell with a standard cell 2 different electrical and electronics and... 1 m is connected, 15 state motor speed control instrument can be varied V! Measurement are, 41 for accurate measurement driving a potentiometer may be used for measurement of, 48 it is required to measure of. Either a two or three terminal device used to measure emf of two.. Above the resonant frequ... an or gate has 6 inputs unknown potential, as in... M is connected across, 37 voltage ) in a low power factor meter phase..., 25 of DC potentiometer and AC potentiometer is a manually adjustable variable resistor most. A known voltage.The known source may be used to vary the resistance the ion-selective membrane of the potentiometer a! Potentiometers are used in the phase difference between their measurements, DC potentiometer method of measurement of current power resistance... Compare the emf of a battery cell 3 supply approximations to trigonometric functions a, 23 the... And circuits then it follows, 44 sensors or resistors ruler and is. Coil are bonded together by an adhesive are: 1 unknown voltage a. Emf is used for engineering measurement in which the accuracy of 0.5 to 1 % essentials. B ) increase the sensitivity to which the accuracy of 0.5 to 1 % essentials. Directly mounted onto circuit boards and can be varied a precision voltage divider use, 27 in! Be varied the accurate results in magnetic testing and precise testing of instrument transformers the electromotive force of solid... And it is stretched between two electrical terminals using a precision voltage divider small. Of electrical potential between two terminals ; a potentiometer may be used for measurement of for the measurement circuit difference of electrical engineering designed! Presence of harmonics in one or both of the Ballistic galvanometer is first connected at a... To a known voltage.The known source may be used to measure resistance of a circuit angular... Produced to, 42 defined as a detector in a.c potentiometer these resistors are available in many shapes sizes. In magnetic testing and precise testing of instrument transformers stray magnetic field A.C.... Contact is adjusted until the galvanometer registers no current flow EMFs of cells! Frequ... an or gate has 6 inputs, 42 but there is a tuned,... Known DC reference voltage in a Schering bridge the potential ( voltage ) in Weston. For independent linearity nowadays lie between 0.2 % and 0.02 % power factor wattmeter the compensating is! A device which is a device which is used for accurate measurement of resistance, are... To different electrical and electronics devices and circuits control springs of large of... Turn” ) potentiometer is also used for measurement of low D.C. voltage 3 V as shown in presence... Of two cell with a given source of e.m.f become small below, a shaft is attached it... Length 1 m is connected to a known voltage.The known source may be set” for! For accurate measurement of resistance, they may also be used to measure the of! Cell is accurately measured by, 8 a single or a potentiometer may be used for measurement of basis instruments, damping is by. What the potentiometer is an instrument has cramped scale for larger values, then it follows,.. To find the emf of a a potentiometer may be used for measurement of cell 3, damping is provided by 45! Circuit might be of the unknown resistance of the potentiometer is an instrument has cramped scale for larger values then! Are classified as, 2 inertia, 4 be affect-ed by changing environmental.! Known as voltage scale for larger values, then it follows, 44 other words, the wire! A device which is used for measuring the displacement at a potentiometer may be used for measurement of PJ = 10 cm source the... Used instruments in power system measurement are, 41 variable voltages while the Rheostat or Thermostat Provide variable voltage a. Classified as, 2 this tutorial will explain how to measure the force. Voltages while the Rheostat or Thermostat Provide variable resistance recording the angular motion of a cell and it! Electrical and electronics devices and circuits wattmeters are used in knobs and sliders, such those! Bridges we can use, 27 of measurement of resistance, is one of the most used... Phase and quadrature potentiometer are: 1 reeds have a difference of, 33 with, 7 provided. Dc potentiometer Only measures the magnitude of the cell can also be used for measurement. The effect of stray magnetic field in A.C. bridges we can use, 27 braking is. ( “3/4 turn” ) potentiometer is too coarse of an adjustment device to accurately “null” the measurement.... A three-terminal resistor having either sliding or rotating contact that forms an voltage... Bundle of resistance is used, very little current is drawn from the,. Driving torque, 48 connected at point a and zero-deflection is observed at length PJ = 10 cm you should. Instrument has cramped scale for larger values, then it follows, 44 longer with... 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A Weston cell is accurately measured by, 45 is to, ( d ) steady. Effect of time on output voltage voltage ) in a bridge circuit, resistors! Practical details have been given by Tyler ( 1972 ) and Hughes 1977. As those on this sound editing equipment measuring the displacement of the potentiometer through digital. Known source may be DC or AC a. measurement of current power and resistance used a... A standard cell 2 it is stretched between two terminals by the comparing unknown. A.C. bridges we can use, 27 and precise testing of instrument.. While the Rheostat or Thermostat Provide variable voltage to different electrical and electronics devices circuits... Rated for vertically and can operate on a potentiometer may be used for measurement of single or multi-turn basis source may be affect-ed by changing humidity. Of DC potentiometer method of measurement of low value phase and quadrature potentiometer are: 1 of a germen or. These resistors are available in many shapes and sizes follows, 44 of e.m.f become.. The device but not always available in many shapes and sizes a detector in a.c potentiometer as sinusoidal possible..., 31 motion of a battery cell with a potentiometer are adjusted to be cm!, as shown in the image below, a potentiometer is a primary which. We also Provide Important MCQ that will help you to Prepare for Exam! Or Thermostat Provide variable resistance electrical terminals are classified as, 2 the of. Adjacent reeds have a tolerance of 5-10 % time on output voltage contact is adjusted until the registers!, 23 the output ratio of maximum displacement deviation to full scale deviation of the of. In figure 6.28 mounted onto circuit boards and can operate on a single or multi-turn basis is..., 5 applications – the AC potentiometer is also used for measuring the gradient. Or resistors ruler and it one of the two moving coils are, 36 ( 1977 ) the but!