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  Solved  Paper-2005

A) \[1\,\Omega \]  

B)                        \[0.5\,\Omega \]             

C)        \[4\,\Omega \]                

D)        \[2\,\Omega \]

Correct Answer: D

Solution :

The internal resistance of the cell,