Electrical And Electronic Measurement MCQs

Question 1

Instrument used for ac measurement alone is

Accepted Answer

induction type

Answer

permanent magnet type

Answer

hot wire type

Answer

electrostatic type

Question 2

Which of the following instruments should be used for measuring ac current?

Accepted Answer

moving iron (attraction type) ammeter

Answer

induction type ammeter

Answer

moving iron voltmeter

Answer

permanent magnet type ammeter

Question 3

An electrical measuring instrument has senstivity of 1000 ohms/volt. On 100 volt scale, this instrument will have internal resistance of

Accepted Answer

105S2

Answer

10S2

Answer

104S2

Answer

1000f2

Question 4

All meters used for measuring current, voltage and resistance are basically

Accepted Answer

current meters

Answer

multimeters

Answer

voltmeters

Answer

ohm meters

Question 5

The phenomenon of creeping occurs in

Accepted Answer

energy meters

Answer

ammeters

Answer

voltmeters

Answer

watt meters

Question 6

Swamping resistance is added to the coil circuit

Accepted Answer

to reduce the temperature error

Answer

to increase the sensitivity

Answer

to reduce error due to thermal emf

Answer

to reduce the power drawn by the instrument

Question 7

Precision measurement of resistances is generally carried out by

Accepted Answer

bridge method

Answer

potentiometer method

Answer

CRO method

Answer

voltmeter-ammeter method

Question 8

The controlling torque in an indicating instrument is produced by

Accepted Answer

spring control or gravity control

Answer

utilizing magnetic, electrodynamic and electrostatic effects

Answer

eddy current

Answer

fluid friction

Question 9

The most efficient form of damping in an instrument is

Accepted Answer

eddy current

Answer

fluid friction

Answer

air friction

Answer

none of these