JEE Mains Model Paper 4

Question : 59 of 90

Marks: +1, -0

Two cells of emfs approximately 5V and 10V are to be accurately compared using a potentiometer of length 400 cm.

The battery that runs the potentiometer should have voltage of 8 V.
The battery of potentiometer can have a voltage of 15 V and R adjusted so that the potential drop across the wire slightly exceeds 10 V.
The first portion of 50 cm of wire itself should have a potential drop of 10 V.
Potentiometer is usually used for comparing resistances and not voltages.

Go to Question:

Prev Question

Next Question