Question

The storage battery of a car has an emf of 12 V. If the internal
resistance of the battery is 0.4 ohm , what is the maximum current
that can be drawn from the battery?​

Answer 1

Answer:

30 A

Explanation:

Emf of the battery, E = 12 V

Internal resistance of the battery, r = 0.4 Ω

Maximum current drawn from the battery = I

According to Ohm’s law,

E = Ir

I = E / r

= 12 / 0.4

= 30 A

The maximum current drawn from the given battery is 30 A.