question_answer

In a potentiometer experiment, the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of Q, the balancing length becomes 120 cm. The internal resistance of the cell is [AIEEE 2005]

A) \[1\,\Omega \]

B) \[0.5\,\Omega \]

C) \[4\,\Omega \]

D) \[2\,\Omega \]

Correct Answer: D

Solution :

[d] The internal resistance of the cell,