Question

The denial cell is balanced on 125 cm length of a potentiometer. Now, the cell is short-circuited by a resistance of 2Ω and the balance is obtained at 100 cm. The internal resistance of the denial cell is?

• A. \( \frac{4}{3} \) Ω
• B. 1.5 Ω
• C. 1.25 Ω
• D. 0.5 Ω

Hint:

In potentiometer circuits, the internal resistance of the cell affects the balancing length.

Answer 1

The Correct Option is D

The balance in a potentiometer is influenced by the internal resistance of the cell. By applying the relationship between the length and resistance, the internal resistance can be calculated.