Question

Q.3 In a potentiometer experiment the balancing with a cell is
at length 240 cm On shunting the cell with a resistance of
2.0, the balancing length becomes 120 cm. The internal
resistance of the cell is​

Answer 1

Answer:

Explanation:

E/V = 240/120

E = 2V

E = V-Ir

2V = V - (V/2)*r

V = (V/2) * r

r = 2 OHM