Question

A battery of emf 2v and internal resistance 1 ohm is used to send a current through a potentiometer wire of length 200 cm and resistance 4 ohm. What length of the wire will be required to balance a cell of emf 1.08 V

Answer 1

Answer:

135 cm

Explanation:

E=I*resistance of the balance point length.

I hope this makes sense

Answer 2

Explanation:

I think the answer is written wrongly.