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A battery of 20 cells is charged by 220...

A battery of 20 cells is charged by 220 V with a charging current of 15 A . If the emf of each cell is 2 V and internal resistance is `0.1 Omega` , then the series resistance required to be placed in the circuit will be

A

`16 Omega`

B

`10 Omega`

C

`12 Omega`

D

`14 Omega`

Text Solution

Verified by Experts

`I = ("Net Emf")/("total resistance") therefore 15 = (220 - 20 xx 2)/(20 xx 0.1 + R) therefore R = 10 Omega`
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