Question

if the emf of the driving cell be decreased what will be the effect on the position of zero deflection in a potentiometer.

Answer 1

Solution:

• Potentiometer is an instrument that is used to measure the amount of emf by passing a known current through a known variable resistance.
• It is a three terminal resistor.
• According to question, if the emf of the driving cell be decreased, the potential gradient that is created across the potentiometer wire gets decreased.
• Because of this reason, the position of zero deflection is obtained on the larger length.