Electrical And Electronic Measurement MCQs

Question 1

Power of 6-phase circuit can be measured with minimum of

Accepted Answer

five wattmeters

Answer

two wattmeters

Answer

three wattmeters

Answer

four wattmeters

Question 2

Self balancing potentiometers are used

Accepted Answer

for industrial instruments

Answer

for vibration instruments

Answer

for experimental purposes in the laboratories

Answer

in recorders

Question 3

Power factor meters have

Accepted Answer

both current and voltage coil

Answer

only current coil

Answer

only voltage coils

Answer

only inductive voltage coil

Question 4

The ratio error in current transformer is due to

Accepted Answer

exciting current

Answer

power factor of primary

Answer

wattless component of current in the primary

Answer

leakage flux

Question 5

In a Wheatstone bridge, known resistances are correct to within ? 0.2%. The accuracy to which an unknown resistance can be measured is

Accepted Answer

? 06%

Answer

? 0.2%

Answer

? 0.4%

Answer

? 0.8%

Question 6

Inductance is measured in terms of capacitance and resistance by using

Accepted Answer

Anderson bridge

Answer

Schering bridge

Answer

Maxwell-Wien bridge

Answer

Wien bridge

Question 7

Which of the following bridges in used to measure inductance of a low-Q inductor?

Accepted Answer

Maxwell bridge

Answer

Hy bridge

Answer

Wien bridge

Answer

Anderson bridge

Question 8

Which of the following instruments is the best choice to measure a de potential difference of about 0.5 volt, the current being 20uA?

Accepted Answer

Potentiometer

Answer

Multimeter

Answer

Rectifier type meter

Answer

VTVM

Question 9

The name Gall Tinsley is associated with

Accepted Answer

ac potentiometers

Answer

dc potentiometers

Answer

energy meters

Answer

Wheatstone bridge