Electrical And Electronic Measurement MCQs

Question 1

The advantage of electrodynamometer type of instruments is

Accepted Answer

the coil being air cored, these instruments are free from hysteresis and eddy current errors

Answer

low torque/weight ratio

Answer

large operating current

Answer

nonuniform scale

Question 2

The damping of ballistic glavanometer 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 3

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

Accepted Answer

decreases

Answer

increases

Answer

remains unlatered

Answer

may increase or decrease

Question 4

Electrostatic voltmeters

Accepted Answer

have scale reading rms value on ac circuits

Answer

are not frequency limited

Answer

have uniform scale

Answer

have scale reading peak value on ac circuits

Question 5

If a d'Arsonval meter movement is rated at 50 ILA, and only 25 ga is passing through its coil, the deflection will be

Accepted Answer

50 per cent of full scale

Answer

100 per cent of full scale

Answer

25 per cent of full scale

Answer

10 per cent of full scale

Question 6

The instrument whose deflection is given

Accepted Answer

electrodynamic type

Answer

repulsion type

Answer

electrostatic type

Answer

attraction type

Question 7

The instrument whose deflection is given dL by the expression OaL`?dO is known as

Accepted Answer

moving iron type

Answer

electrodynamic type

Answer

electrostatic type

Answer

induction type

Question 8

Which of the following instrument consumes the lowest power measurement?

Accepted Answer

electrostatic instrument

Answer

VTVM

Answer

PMMC instrument

Answer

d'Arsonval instrument by the expression Oal2 dO is known as dM

Question 9

Instrument used for dc measurement alone is

Accepted Answer

permanent magnet type

Answer

moving iron type

Answer

electrodynamic type

Answer

induction type