Question

A resistor having resistance 5Ω is connected across a battery of 5 V by means of a wire of negligible resistance. Current passes through resistor is 0.4 A. The total power produced by battery is;
2W
3W
5W
6W

Answer 1

Answer:

A resistor having resistance 5Ω is connected across a battery of 5 V by means of a wire of negligible resistance. Current passes through resistor is 0.4 A. The total power produced by battery is; 2W.

Answer 2

Answer:

The total power produced by the battery is 2 Watt.

Explanation:

Given the resistance of the resistor, R = 5Ω

The potential difference across the battery, V = 5 V

The current passing through the resistor, I = 0.4A

Given there is negligible resistance in the circuit.

Electric power is defined by the flow of electric charge and potential difference of the source to deliver the energy.

Thus, the output power of the battery is given by the product of potential difference and current.

$P=V\times I$

Substituting the given values,                                          

$P=5\times 0.4=2W$

Therefore, the total power produced by the battery is 2 Watt.

So, the correct answer is option 1.

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