Question

A potentiometer is basically a

• A. deflection type instrument and power consumed in the circuit of unknown source is ideally zero
• B. null type instrument and power consumed in the circuit of unknown source is high
• C. deflection type instrument and power consumed in the circuit of unknown source is high
• D. null type instrument and power consumed in the circuit of unknown source is ideally zero

Hint:

Potentiometers are null-type instruments with ideally zero power consumption from measured source.

Answer 1

The Correct Option is D

A potentiometer is a null type instrument — it works on zero current condition (no deflection). Thus, ideally it consumes no power from the unknown voltage source.