A 12V battery has an internal resistance of 0.5W.If a cable of 1.0W resistance is...
PHYSICS
JAMB 1994
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 Answer: B. 8.0A
Explanation
I = \(\frac{E.m.f}{R + r}\)
= \(\frac{12}{1 + 0.5}\)
I = 8A
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