What is a potentiometer ?

What is a potentiometer ?
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1 Answer

Answer :

: Potentiometer is a device used to measure voltage difference and electromagnetic force in a voltage drop method.
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An instrument commonly used for the measurement of atmospheric pressure is known as A. Manometer B. Barometer C. Calorimeter D. Potentiometer

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Which one of the following is the name of a device used to measure voltage without drawing ANY current from the circuit being measured? Is it: w) a wattmeter x) a galvanometer y) an ammeter z) a potentiometer

Description : Which one of the following is the name of a device used to measure voltage without drawing ANY current from the circuit being measured? Is it: w) a wattmeter x) a galvanometer y) an ammeter z) a potentiometer

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Description : What is a potentiometer in Arduino?

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What is a potentiometer in Arduino?

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How can I wire a doubled up Potentiometer to cut two different frequencies?

Description : How can I wire a doubled up Potentiometer to cut two different frequencies?

Last Answer : answer:Not quite sure I understand (and even if I do, not sure I can help, but I'll try). Are you saying that you want to re-purpose your tone knob to be a balance knob between the two ... pickups wired in parallel) that will widen on the treble side above 5 and widen on the base side below 5?

In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of `2Omega`, the balancing length

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Potentiometer measures the potential difference more accurately than a voltmeter, because

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In potentiometer experiment, a cell of emf `1.25 V` gives balancing length of 30 cm. If the cell is replaced by another cell, then balancing length is

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An electron in potentiometer experiences a force `2.4xx10^(-19)N`. The length of potentiometer wire is 6m. The emf of the battery connected across the

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A potentiometer wire of length 10 m and resistance `10 Omega` per meter is connected in serice with a resistance box and a 2 volt battery. If a potent

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A potentiometer wire of length `100 cm` having a resistance of `10 Omega` is connected in series with a resistance `R` and a cell of emf `2V` of negli

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A potentiometer wire has length `4 m` and resistance `8 Omega`. The resistance that must be connected in series with the wire and an accumulator of e.

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A potentiometer wire is `100 cm` long hand a constant potential difference is maintained across it. Two cells are connected in series first to support

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Assertion : In potentiometer experiment, null point cannot be obtained if emf of unknown battery is more than the emf of known battery. Reason : By in

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Assertion : In case of potentiometer experiment, if emfs of known and unknown both batteries are increased two times, then null point length will rema

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A `1 Omega` resistance in series with an ammeter is balanced by 25 cm of potentiometer by 50 cm. The ammeter shows a reding of `1.5 A`. Then, the erro

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A potentiometer circuit is setup as shown. The potential gradient across the potentiometer wire is `k "volt"//cm` and the ammeter present in the circu

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In given figure, the potentiometer wire AB has a resistance of `5 Omega` and length 10 m . The balancing length AM for the emf of 0.4 V is

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The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a battery wh

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A potentiometer having the potential gradient of `2 mV//cm` is used to measure the difference of potential across a resistance of `10 ohm`. If a lengt

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AB is a potentiometer wire of length 100 cm and its resistance is `10Omega`. It is connected in series with a resistance R = 40 `Omega` and a battery

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For a cell of e.m.f. 2 V , a balance is obtained for 50 cm of the potentiometer wire. If the cell is shunted by a `2Omega` resistor and the balance is

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A potentiometer having the potential gradient of `2 mV//cm` is used to measure the difference of potential across a resistance of `10 ohm`. If a lengt

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A 2 V battery, a `990Omega` resistor and a potentiometer of 2 m length, all are connected in series of the resistance of potentiometer wire is `10Omeg

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Two cells of emfs `E_(1)` and `(E_(2) (E_(1) gt E_(2))` are connected as shows in Fig. `6.45`. When a potentiometer is connected between `A` and `B`,

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The resistivity of a potentiometer wire is `40xx10^(-8)Omega-m` and its area of cross section is `8xx10^(-6)m^(2)`. If 0.2 A current is flowing throug

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For measurement of potential difference, potentiometer is perferred in comparison to voltmeter because

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Potentiometer wire of length `1 m` is connected in series with `490 Omega` resistance and `2 V` battery. If `0.2 mV/cm` is the potential gradient, the

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In a potentiometer experiment, the galvanometer shows no deflection when a cell is connected across `60 cm` of the potentiometer wire. If the cell is

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Define potentiometer?

Description : Define potentiometer?

Last Answer : A dual potentiometer is nothing but a potentiometer which has TWO channels.. Like two INs and two OUTs on the same unit.

The pH value of sewage is determined with the help of A. Imhoff Cone B. Turbid meter C. Potentiometer D. None of these

Description : The pH value of sewage is determined with the help of A. Imhoff Cone B. Turbid meter C. Potentiometer D. None of these

Last Answer : ANS: C

The electrical device shown in the illustration is a/an _____________. EL-0077 A. operating coil B. indicating lamp C. motor armature D. potentiometer

Description : The electrical device shown in the illustration is a/an _____________. EL-0077 A. operating coil B. indicating lamp C. motor armature D. potentiometer

Last Answer : Answer: D

In the illustrated amplifier, the RESET potentiometer A1R2 sets the stability of the control loop by changing the reset time constant. As the potentiometer is turned clockwise _________. EL-0060 A. the gain is increased B. the stability is increased by slowing the response time C. feedback is increased to the summing point at terminal 5 D. response time is increased decreasing stability

Description : In the illustrated amplifier, the RESET potentiometer A1R2 sets the stability of the control loop by changing the reset time constant. As the potentiometer is turned clockwise _________. EL-0060 A. ... is increased to the summing point at terminal 5 D. response time is increased decreasing stability

Last Answer : Answer: B

To determine the state of charge of a nickel-cadmium battery, you would use a/an _____________. A. voltmeter B. hydrometer C. ammeter D. potentiometer

Description : To determine the state of charge of a nickel-cadmium battery, you would use a/an _____________. A. voltmeter B. hydrometer C. ammeter D. potentiometer

Last Answer : Answer: A

As shown in the illustrations, ordered rudder angle is fed back from the ________________. EL-0097 A. power unit to the magnetic amplifier B. steering gear to the control potentiometer C. magnetic amplifier to the steering gear D. rudder yoke to the non-followup controller

Description : As shown in the illustrations, ordered rudder angle is fed back from the ________________. EL-0097 A. power unit to the magnetic amplifier B. steering gear to the control potentiometer C. magnetic amplifier to the steering gear D. rudder yoke to the non-followup controller

Last Answer : Answer: A

If Relay #5 changed contact position grounding the 'auto' input to the 'pitch controller module', pitch control would be effected by the _________________. EL-0095 A. pitch feedback potentiometer B. Engine room thrust split potentiometer C. Engine room thrust lever only D. Bridge thrust lever only

Description : If Relay #5 changed contact position grounding the 'auto' input to the 'pitch controller module', pitch control would be effected by the _________________. EL-0095 A. pitch feedback potentiometer B. Engine room thrust split potentiometer C. Engine room thrust lever only D. Bridge thrust lever only

Last Answer : Answer: B

As shown in the two illustrations for 'pitch control' and engine speed control', when the plant is in 'AUTO / CRUISE' propeller pitch is controlled by ___________. EL-0095 A. the 'trim potentiometer' and speed by either 'thrust lever' B. either 'thrust lever' and speed also by the selected Lever C. the split trim potentiometer and speed by its 'trim pot'. D. either 'thrust lever' and speed by the 'trim potentiometer'

Description : As shown in the two illustrations for 'pitch control' and engine speed control', when the plant is in 'AUTO / CRUISE' propeller pitch is controlled by ___________. EL-0095 A. the 'trim potentiometer' and ... and speed by its 'trim pot'. D. either 'thrust lever' and speed by the 'trim potentiometer'

Last Answer : Answer: D

The 'pitch controller module' shown in the illustration is fed the actual pitch position of the propeller from the _____________. EL-0095 A. 'pitch meter' B. 'pitch feedback potentiometer' C. #5 relay position D. pitch error signal

Description : The 'pitch controller module' shown in the illustration is fed the actual pitch position of the propeller from the _____________. EL-0095 A. 'pitch meter' B. 'pitch feedback potentiometer' C. #5 relay position D. pitch error signal

Last Answer : Answer: B

A suspected 'open' in a motor field can be tested by using a/an ____________. A. potentiometer B. megger C. wattmeter D. ammeter

Description : A suspected 'open' in a motor field can be tested by using a/an ____________. A. potentiometer B. megger C. wattmeter D. ammeter

Last Answer : Answer: B

To test the state of charge of a nickel-cadmium battery, you should use a/an ____________. A. ammeter B. voltmeter C. hydrometer D. potentiometer

Description : To test the state of charge of a nickel-cadmium battery, you should use a/an ____________. A. ammeter B. voltmeter C. hydrometer D. potentiometer

Last Answer : Answer: B

In order to check the performance of a transistor removed from its circuit, the instrument to be used should be a/an ____________. A. voltmeter or transistor tester B. impedance meter C. ohmmeter or transistor tester D. sensitive potentiometer

Description : In order to check the performance of a transistor removed from its circuit, the instrument to be used should be a/an ____________. A. voltmeter or transistor tester B. impedance meter C. ohmmeter or transistor tester D. sensitive potentiometer

Last Answer : Answer: C

Which of the following devices should be used to measure the temperature of a battery electrolyte? A. Mercury thermometer B. Alcohol thermometer C. Thermocouple pyrometer D. Potentiometer

Description : Which of the following devices should be used to measure the temperature of a battery electrolyte? A. Mercury thermometer B. Alcohol thermometer C. Thermocouple pyrometer D. Potentiometer

Last Answer : Answer: B

What is the difference the a wheatstone bridge and a potentiometer ?

Description : What is the difference the a wheatstone bridge and a potentiometer ?

Last Answer : The difference between a potentiometer and a wheatstone bridge measuring instrument is that potentiometer is a voltage measuring instrument and wheatstone bridge is a current measuring instrument. 

How will you calibrate a temp. recorder using a potentiometer ?

Description : How will you calibrate a temp. recorder using a potentiometer ?

Last Answer : Connect the potentiometer output to the input of temp. recorder. 1. Connect the ( +ve ) to the ( +ve ) and ( -ve ) to the ( -ve ). 2. If ambient compensation is provided ... ambient temp. millvolts to the corr. input millvolts measured. Find out from the chart for the corresponding temperature. 

Draw a potentiometer temp. Measuring circuits and explain its?

Description : Draw a potentiometer temp. Measuring circuits and explain its?  

Last Answer : OPERATION : The input to the instrument is a measurement of some in the processes using a sensing element ( such as thermocouple ) or a device to produce direct voltage, which is the voltage (signal) ... to zero results ( null point ) the balancing ( servo motor is be longer driven )   

Describe the differences between the rheostat connections and those of the potentiometer.

Description : Describe the differences between the rheostat connections and those of the potentiometer.

Last Answer : The rheostat may have two connections, one fixed and one moveable; the potentiometer always has three connections, one moveable and two fixed

Compare linear and logarithmic potentiometer.

Description : Compare linear and logarithmic potentiometer. 

Last Answer : Sr. No. Linear Potentiometer Logarithmic Potentiometer 1 It has a linear variation of resistance with each degree of rotation of its shaft. It has a ... user control uses linear potentiometers Logarithmic potentiometers are often used in connection with audio amplifiers.

Which instrument is used for photographing the Sun? (1) Galvanometer (2) Potentiometer (3) Spectrophotometer (4) Spectroheliograph

Description : Which instrument is used for photographing the Sun? (1) Galvanometer (2) Potentiometer (3) Spectrophotometer (4) Spectroheliograph

Last Answer : Spectroheliograph