Electrical And Electronic Measurement MCQs

Question 1

The damping of ballistic galvanometer is kept very small

Accepted Answer

to make the system critically damped

Answer

to make the system oscillating

Answer

in order to get large first deflection

Answer

in order to get small first deflection

Question 2

Electrostatic instruments are not free from effect of

Accepted Answer

stray magnetic field

Answer

temperature

Answer

frequency

Answer

stray electrostatic field

Question 3

If the current sensitivity of a galvanometer is increased, the voltage sensitivity

Accepted Answer

decreases

Answer

increases

Answer

remains unlatered

Answer

may increases or decrease

Question 4

For capacitance measurement, a ballistic galvanometer should have

Accepted Answer

a high critical resistance and a high period of oscillation

Answer

a high critical resistance and a low period of oscillation

Answer

a low critical resistance and a high period of oscillation

Answer

a low critical resistance and a low period of oscillation

Question 5

The fixed coil in an electrodynamometer is normally used as a

Accepted Answer

current coil

Answer

potential coil

Answer

either as potential coil or as current coil

Answer

there is no fixed coil in electrodynamometer

Question 6

Deflection of the d' Arsonval meter movement is caused by

Accepted Answer

current in the coil and the magnet

Answer

the spring and the magnet

Answer

the pivot and the springs

Answer

the magnetic field alone

Question 7

When we measure ac voltage with a d' Arsonval meter movement, the meter will respond to

Accepted Answer

pulsating ac signal

Answer

ac signal

Answer

dc signal

Answer

rectified dc signal

Question 8

A d' Arsonval meter of 200 ohm coil and 0-1 mA sensitivity is to work as voltmeter of full scale rating 10 volts. The value of multiplier should be

Accepted Answer

9800 SI

Answer

I ki2

Answer

10 ki2

Answer

900

Question 9

Rectifier instruments indicate

Accepted Answer

rms value

Answer

average value

Answer

peak value

Answer

dc value