The storage battery of a car has an emf of 10 V. If the internal resistance of the battery is 0.2 Ω, then the maximum current that can be drawn from the battery is
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 50 A
Given:
EMF of battery: $E = 10$ V
Internal resistance: $r = 0.2 \ \Omega$
Maximum current occurs when external resistance $R = 0$: $I_\text{max} = \frac{E}{r}$
$I_\text{max} = \frac{10}{0.2} = 50$ A
Answer: $I_\text{max} = 50$ A