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A storage battery is connected to a charger for charging with a voltage of 12.5 volts. The internal resistance of the storage battery is 1Ω When the charging current is 0.5 A, the emf of the storage battery is

a
13 volts
b
12.5 volts
c
12 volts
d
11.5 volts

detailed solution

Correct option is C

V=ε+ir ⇒ 12.5 = ε+ 12 1 ⇒  ε=12 V(As the battery is a storage battery it is getting charged)

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