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

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

Grade:11

1 Answers

Vikas TU
14149 Points
3 years ago
Given that,

Emf = 12 V

Internal Resistance = 0.4 Ω

Maximum current that can be drawn = ?

We know that,

Emf = Current * Internal Resistance ( Ohm's Law )

=> 12 V = I * 0.4 Ω

=> I = 12 V / 0.4 Ω

=> I = 120 V / 4 Ω

=> I = 30 A or 30 amperes.

Hence the maximum current ( I ) that can be drawn is 30 A.
 

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