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A current of $5.0 A$ flows through a $12 Ω$ resistor. What is the rate at which heat energy is produced in the resistor?

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300 W

260 W

430 W

600 W

answer is A.

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Detailed Solution

A current of

5.0 A

flows through a

12 Ω

resistor. The rate at which heat energy is produced in the resistor is

300 W

.
Given that, current

I = 5 A

Resistance

R = 12 Ω

We know from joule’s heating law ;
Heat energy

H = I^{2} Rt

Rate at which heat energy is produced in the resistor

H / t = I^{2} R

\Rightarrow H / t = 5^{2} \times 12

\Rightarrow H / t = 25 \times 12

\Rightarrow H / t = 300 joule / s

Watt

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