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JEE Main 2022 (25 Jun, Shift 1) · Electrical Power & Heating Effect

Electrical Power & Heating Effect question from JEE Main 2022 (25 Jun, Shift 1)

Q25JEE Main 2022 · 25 JUN · SHIFT 1Easy

Electrical Power & Heating Effect

A resistor develops 300 J of thermal energy in 15 s, when a current of 2 A is passed through it. If the current increases to 3 A, the energy developed in 10 s is ____________ J.

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

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Answer: 450

$R = \frac{H}{I^2 t} = \frac{300}{4 \times 15} = 5\ \Omega$ .
New energy $H' = I'^2 R t' = 9 \times 5 \times 10$ .
$H' = 450\ \text{J}$ .

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