English

A current I flows through a resistance R for the time 't', the electric energy consumed by the resistance is:

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Question

A current I flows through a resistance R for the time 't', the electric energy consumed by the resistance is:

Options

  • $$\mathrm{I} \times \mathrm{R} \times t$$

  • $$\mathrm{I} \times \mathrm{R}^{2} \times t$$

  • $$\mathrm{I}^{2} \times \mathrm{R} \times t$$

  • $$\frac{I^2 \times R}{t}$$

MCQ
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Solution

$$\mathrm{I}^{2} \times \mathrm{R} \times t$$

Explanation:

The electrical energy produced in a resistance is $$W = I^2Rt$$.

The other options either use incorrect powers of current or resistance, or divide by time instead of multiplying by it.

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Chapter 8: Electric Energy, Power and Household Circuits - EXERCISE-1 [Page 178]

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Goyal Brothers Prakashan A New Approach to ICSE Physics [English] Class 10
Chapter 8 Electric Energy, Power and Household Circuits
EXERCISE-1 | Q 2. | Page 178
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