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


bCosine wave


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


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


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


b20 kO


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


bDecrease


cRemain the same


dNone of the above


View Answer Decrease

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