Question

A (2.5 V) battery is connected to a potentiometer wire. A cell of e.m.f. (1.08 V) is balanced by the voltage drop across (2.16 m) of wire. The length of the potentiometer wire is

• A. (2.5 m)
• B. (3 m)
• C. (5 m)
• D. (6 m)

Hint:

Potential gradient is constant for a uniform wire with a steady current.

Answer 1

The Correct Option is C