GATE EE 1992 | Potentiometer and Instrument Transformers Question 11 | Electrical and Electronics Measurement

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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