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A 12V battery has an internal resistance of 0 5... - JAMB Physics 1995 Question

A 12V battery has an internal resistance of 0.5W.If a cable of 1.0W resistance is connected across the two terminals of the battery, the current drawn from the battery is
A
16.0A
B
8.0A
C
0.8A
D
0.4A
correct option: b

I = (\frac{E.m.f}{R + r})

= (\frac{12}{1 + 0.5})

I = 8A

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