Question

for a cell terminal PD is 10v when circuit is open and reduces to 5v when cell is connected to resistance of 2ohm the internal resistance of the cell is
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Answer 1

Explanation:

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Answer 2

Explanation:

P.D =2.2 volts this is the emf of the cell.

now when the circuit is closed and a current is flowing through the circuit then the P.D =1.8v

thus the total resistance of the circuit is R+r=5 + rohms