GATE EE 1997 | Potentiometer and Instrument Transformers Question 7 | Electrical and Electronics Measurement

GATE EE 1997

MCQ (Single Correct Answer)

-0.3

A potentiometer is basically

Deflection type instrument

Null type instrument

Deflection as well as null

A digital instrument

GATE EE 1997

MCQ (Single Correct Answer)

-0.3

A transfer instrument employed in the standardization of a polar type $$a.c$$ potentiometer is ______

an electro static instrument

a thermal instrument

a dynamo meter instrument

a moving coil instrument

GATE EE 1997

MCQ (Single Correct Answer)

-0.3

The primary current in a current transformer is dictated by

the secondary burden

The core of the transformer

the load current

none of the above

GATE EE 1992

MCQ (Single Correct Answer)

-0.3

In $$d.c.$$ potentiometer measurements, a second reading is often taken after reversing the polarities of the $$s.c.$$ supply and the unknown voltage, and the average of the two readings is taken. This is, with a view to eliminate the effects of

Ripples in the $$d.c.$$ supply

Stray magnetic fields

Stray thermal emf's

Erroneous standardization

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