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JEE Main 2021 (31 Aug, Shift 2) · Electrical Power & Heating Effect

Electrical Power & Heating Effect question from JEE Main 2021 (31 Aug, Shift 2)

Q30JEE Main 2021 · 31 AUG · SHIFT 2Easy

Electrical Power & Heating Effect

A resistor dissipates 192 J of energy in 1s when a current of 4A is passed through it. Now, when the current is doubled, the amount of thermal energy dissipated in 5s in _________ J.

Numerical answer type. Work it out, then open the answer.

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Answer: 3840

$R = \frac{H}{I^2 t} = \frac{192}{16 \times 1} = 12\ \Omega$ .
With $I = 8\ \text{A}$ : $H = 64 \times 12 \times 5$ .
$H = 3840\ \text{J}$ .

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