Electrical And Electronic Measurement MCQs

Question 1

A moving coil galvanometer is made into a d.c. ammeter by connecting

Accepted Answer

a low resistance across the meter

Answer

a high resistance in series with the meter

Answer

a pure inductance across the meter

Answer

a capacitor in series with the meter

Question 2

The current coil of single phase energy meter is wounded

Accepted Answer

both the limbs of the laminated core with same number of turns

Answer

one limb of the laminated core

Answer

both the limbs of the laminated core with different turns

Answer

the centre of the limb on the laminated core

Question 3

The meter constant of energy meter is given by

Accepted Answer

rev/kWh

Answer

rev/kW

Answer

rev/watt

Answer

rev/kWs

Question 4

The most commonly used type of single phase energy meter is

Accepted Answer

induction type

Answer

dynamometer type

Answer

electrostatic type

Answer

moving coil type

Question 5

Some wire-wound resistors have bifilar winding. This type of winding is used to

Accepted Answer

reduce the inductance of winding

Answer

increase the thermal stability

Answer

reduce the tolerance

Answer

double the power rating of the resistance

Question 6

A CRO screen has ten divisions on the horizontal scale. If a voltage signal 5 sin (314t + 450) is examined with a line base setting of5 mesc/div, the number of cycle of signal displaced on the screen will be

Accepted Answer

10 cycles

Answer

0.5 cycle

Answer

(c) 5 cycles

Answer

(b) 2.5 cycles

Question 7

A metal strain guage factor of two. Its nominal resistance is 120 ohms. It undergoes strain at 10?, the value of change of resistance in response to the strain is

Accepted Answer

2.4 x 10-3 ohms

Answer

240 ohms

Answer

2 x 105 ohm

Answer

1.2 x 10-3 ohm

Question 8

A Kelvin double bridge is best suited for the measurement of

Accepted Answer

low resistance

Answer

inductance

Answer

capacitance

Answer

high resistance

Question 9

A certain oscilloscope with 4 cm by 4 cm screen has its own speed output fed to its input at the x and y sensitivities are same. The oscilloscope will display a

Accepted Answer

diagonal line

Answer

triangular wave

Answer

sine wave

Answer

circle