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An ohmmeter is a moving coil instrument.

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Description :

When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is ?

Answer :

When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is all right.

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99 views 1 answer
Description :

Answer :

A moving coil instrument is used as an ohmmeter. The indicating scale of the meter will be Hyperbolic.

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241 views 1 answer
Description :

Answer :

A Ohmmeter is basically: A ammeter

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612 views 1 answer
Description :

 In an electronic ohmmeter an op -amp is used as a: -  a) sommer b) multiplier c) buffer amplifier d) integrator

Answer :

 In an electronic ohmmeter an op -amp is used as a: -  buffer amplifier

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294 views 1 answer
Description :

When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is? A.overheated B.shorted C.open D.reversed

Answer :

When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is? A.overheated B.shorted C.open D.reversed

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167 views 1 answer
Description :

Pointer of an analog ohmmeter reading close to zero, indicates the resistor being measured is: A. overheated B. shorted C. open D. reversed

Answer :

Pointer of an analog ohmmeter reading close to zero, indicates the resistor being measured is: shorted

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280 views 1 answer
Description :

List applications of ohmmeter.

Answer :

1. The ohmmeter is a meter for measuring electrical resistance in ohm. 2. It is used as Megger to measure high resistance. 3. It is used to test the power circuits.

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8 views 1 answer
Description :

Explain the calibration of series type ohmmeter.

Answer :

Series Ohmmeter If the resistor's value is unknown and has to be measured by placing it in series with the ohmmeter, then that ohmmeter is called series ohmmeter. The circuit diagram of ... hand of the scale respectively. Series ohmmeter is useful for measuring high values of resistances.

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7 views 1 answer
Description :

What will happen if a voltmeter is connected like an ammeter in series of the load ? (a) The meter will burn out. (b) The measurement will be too high. (c) The same current will flow as would have been with ammeter in circuit. (d) There will be almost no current in the circuit. 

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78 views 0 answers
Description :

If a dynamometer wattmeter is connected in an ac circuit, the power indicated by the wattmeter will be (a) volt-ampere product (b) average power (c) peak power (d) instantaneous power 

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106 views 0 answers
Description :

An average reading digital multimeter reads 10 V when fed with a triangular wave, symmetric about the time axis. For the same input the r.m.s. reading meter will read

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138 views 0 answers
Description :

The measurement range of an ammeter can be increased by using a:

Answer :

The measurement range of an ammeter can be increased by using a: low resistance in shunt

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95 views 1 answer
Description :

An ammeter has a current change of 0—5A and its internal resistance is 0.2 ohm. In order to Change the range to 0-25 A, wear need to add a resistance of  A) 0.8 ohm in series with the meter B) 1.0 ohm in series with the meter C) 0.04 ohm in parallel with the meter D) 0.05 ohm in parallel with the meter

Answer :

An ammeter has a current change of 0—5A and its internal resistance is 0.2 ohm. In order to Change the range to 0-25 A, wear need to add a resistance of 0.05 ohm in parallel with the meter

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Answer :

The time/div and voltage/div axes of an oscilloscope have been erased. When a 1 kHz, 5V p-p square wave calibration pulse is connected to channel 1 ofthe scope the waveform observed on the screen is ... are the same, the amplitude (pp) and period of the unknown signal are respectively. 7.5 V, 2ms

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233 views 1 answer
Description :

 In the case of an instrument reading of 8.3 V with a 0 to 150 voltmeter having a guaranteed accuracy of 1% full scale reading, the percentage limiting error is   (A) 1.810% (B) 0.181% (C)12.45% (D) 0.0018%

Answer :

 In the case of an instrument reading of 8.3 V with a 0 to 150 voltmeter having a guaranteed accuracy of 1% full scale reading, the percentage limiting error is 12.45%

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212 views 1 answer
Description :

An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to  (1) 1.414 times dc sensitivity (2) dc sensitivity (3) 0.9 times dc sensitivity (4) 0.707 times dc sensitivity

Answer :

An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to 0.9 times dc sensitivity

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464 views 1 answer
Description :

A Pyrheliometer is an instrument to measure :  (A) temperature of solar photovoltaic cell  (B) intensity of direct solar radiation at normal incidence  (C) intensity of indirect solar radiation  (D) efficiency of a solar photovoltaic cell

Answer :

A Pyrheliometer is an instrument to measure : intensity of direct solar radiation at normal incidence 

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103 views 1 answer
Description :

A 500 W bulb fitted with a reflector illuminates an area of 2 m x 2 m with an average illumination of 500 lux. The efficiency of the reflector is 50%. The efficiency of the bulb in lumens/watt is : 

Answer :

A 500 W bulb fitted with a reflector illuminates an area of 2 m x 2 m with an average illumination of 500 lux. The efficiency of the reflector is 50%. The efficiency of the bulb in lumens/watt is : 8

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46 views 1 answer
Description :

A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is (A) 1 Ω (B) 1.001 Ω (C) 0.5 Ω (D) 10 Ω

Answer :

A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is 1.001 Ω

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135 views 1 answer
Description :

Answer :

The error of an instrument is normally given as a percentage of full-scale value.

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Description :

Answer :

An 8 bit converter type A/D converter makes at least 8000conversions/sec. The clock frequency used is 2MHz.

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Description :

Answer :

An Aryton shunt is used to make a D'Arsonval galvanometer into a multi range ammeter.

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173 views 1 answer
Description :

It is desired to convert a 0-1000A meter movement, with an internal resistance of 100 ohms, into a 0-100mA meter. The required value of shunt resistance is about 

Answer :

It is desired to convert a 0-1000A meter movement, with an internal resistance of 100 ohms, into a 0-100mA meter. The required value of shunt resistance is about 1 ohms.

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2.6k views 1 answer
Description :

Answer :

 If a DC voltmeter is made from an ammeter having a fed of 100μA then its sensitivity (in KΩ/V) will be 10.

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186 views 1 answer
Description :

Answer :

If a voltmeter is connected, like an ammeter in series to the load: Almost no current will flow in the circuit

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Description :

Answer :

The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a two-phase winding.

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131 views 1 answer
Description :

To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken?

Answer :

To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken from the same source as the unknown voltage.

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Description :

Answer :

An ammeter is a secondary instrument.

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58 views 1 answer
Description :

The bridge used to measure the dielectric loss of an insulator is: A) Anderson bridge B) Wien’s bridge C) Schering bridge D) Any of the above

Answer :

C)Schering bridge

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1.2k views 2 answers
Description :

The moving system of an indicating type of electrical instrument is subjected to (a) a deflecting torque (b) a controlling torque (c) a damping torque (d) All of the above

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134 views 0 answers
Description :

In an ac tachometer, the two stator field coils are mounted

Answer :

In an ac tachometer, the two stator field coils are mounted in space quadrate

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26 views 1 answer
Description :

Continuity of an electrical circuit is usually checked by

Answer :

Continuity of an electrical circuit is usually checked by Ohmmeter

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44 views 1 answer
Description :

The force required to move the pointer in an indicating instruments is

Answer :

The force required to move the pointer in an indicating instruments is deflecting force

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3.0k views 1 answer
Description :

An accurate voltmeter must have an internal impedance of (A) very low value. (B) very high value (C) medium value. (D) zero Value

Answer :

An accurate voltmeter must have an internal impedance of very high value

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660 views 1 answer
Description :

An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be  (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field

Answer :

An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field

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277 views 1 answer
Description :

An induction type energy meter is found to run fast. Correction for this error can be made by  (A) Over-load compensation. (B) Voltage compensation. (C) Moving the brake magnet away from the centre of the disc. (D) Moving the brake magnet towards the centre of the disc.

Answer :

An induction type energy meter is found to run fast. Correction for this error can be made by Moving the brake magnet away from the centre of the disc.

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112 views 1 answer
Description :

Answer :

An ideal meter should have Absolutely no effect on the circuit being measured.

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Description :

Answer :

The internal resistance of an ammeter should be Very small.

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Description :

The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100Ohm. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

Answer :

The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100Ohm. This is to have full deflection when 100V is measured. 99.99 K ohms is the value of series resistor to be used.

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342 views 1 answer
Description :

 The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100Ohm. If this meter is to have full deflection at 5A, what is the value of the shunt resistance to be used?

Answer :

 The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100Ohm. If this meter is to have full deflection at 5A, 1/49.99 ohms is the value of the shunt resistance to be used.

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192 views 1 answer
Description :

Answer :

The repeat accuracy of an instrument can be judged from its standard deviation of error.

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Description :

Answer :

An oscilloscope indicates Peak to peak value of voltage.

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71 views 1 answer
Description :

Answer :

An instrument to be used for measurement and control should preferably have Linear output and fast response

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301 views 1 answer
Description :

Answer :

The sensitivity of an instrument is ratio of the change in the magnitude of the output to the corresponding change in the magnitude of the input.

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49 views 1 answer
Description :

 The percentage limiting error, in the case of an instrument reading of 8.3V with a 0 to 150V voltmeter having a guaranteed accuracy of 1% full-scale reading is

Answer :

 The percentage limiting error, in the case of an instrument reading of 8.3V with a 0 to 150V voltmeter having a guaranteed accuracy of 1% full-scale reading is 18.10%.

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98 views 1 answer
Description :

Answer :

An instrument transformer is used to extend the range of induction instrument.

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138 views 1 answer
Description :

Answer :

In an energy meter braking torque is produced to maintain steady speed and equal to driving torque

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77 views 1 answer
Description :

Answer :

 Various adjustments in an energy meter include light load or friction, lag and creep, overload and voltage compensation.

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Description :

Answer :

Megger is an instrument used for the measurement of: High resistance and insulation resistance

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Description :

Answer :

An instrument that is capable of measuring only dc is: Moving coil

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