When a Daniel cell is connected in the secondary circuit of a potentiometer,

When a Daniel cell is connected in the secondary circuit of a potentiometer, the balancing length is found to be 540 cm. If the balancing length becomes 500 cm when the cell is short circuited with 1 Ω, the internal resistance of the cell is

Options

(a) 0.08 Ω
(b) 0.04 Ω
(c) 1.45 Ω
(d) 1.08 Ω

Correct Answer:

0.08 Ω

Explanation:

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  • ((Final length-initial length)/initial length )×resistence increased
    ((540-500)/500 )×1=40/500=0.08ohm

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