Electrical Engineering MCQs

Page No. 76

The resistance of an ideal voltmeter is ______________?


a Low

✖


b Infinite

✓


c Zero

✖


dHigh

✖


View Answer Infinite

If 2% of the main current is to be passed through a galvanometer of resistance G, then resistance of the shunt required is ________________?


aG/50

✖


b G/49

✓


c 49 G

✖


d50 G

✖


View Answer G/49

The horizontal plates of a CRO are supplied with _____________ to observe the waveform of signal?


a Sinusoidal wave

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bCosine wave

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c Sawtooth wave

✓


dNone of the above

✖


View Answer Sawtooth wave

An ideal ammeter has ______________ resistance?


a Low

✖


bInfinite

✖


cZero

✓


d High

✖


View Answer Zero

To send 10% of the main current through a moving coil galvanometer of resistance 99 O the shunt required is______________?


a11 O

✓


b9 O

✖


c100 O

✖


d9 O

✖


View Answer 11 O

If the negative potential on the control grid of CRT is increased, the intensity of spot _____________?


aIs increased

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bIs decreased

✓


cRemains the same

✖


dNone of the above

✖


View Answer Is decreased

Two multimeters A and B have sensitivities of 10 kO/V and 30 kO/V respectively. Then ______________?


aMultimeter A is more sensitive

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bMultimeter B is more sensitive

✓


cBoth are equally sensitive

✖


dNone of the above

✖



What is the total resistance of a voltmeter on the 10 V range when the meter movement is rated for 50 µA of full-scale current ?


a10 kO

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b20 kO

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c 200 kO

✓


dNone of the above

✖


View Answer 200 kO

A series ohmmeter circuit uses a 3 V battery and a 1 mA meter movement. What is the half-scale resistance for this movement ?


a3 kO

✓


b kO

✖


ckO

✖


d6 kO

✖


View Answer 3 kO

When an ammeter is inserted in the circuit, the circuit current will _____________?


aIncrease

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bDecrease

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cRemain the same

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dNone of the above

✖


View Answer Decrease

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