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JEE Main 2002 (AIEEE) · Electrical Power & Heating Effect

Electrical Power & Heating Effect question from JEE Main 2002 (AIEEE)

Q90JEE Main 2002 · AIEEEMedium

Electrical Power & Heating Effect

If in the circuit, power dissipation is $150\text{ W},$ then $R$ is

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Answer: (b)

$R$ and $2\ \Omega$ are in parallel across 15 V.
$P = \dfrac{225}{R} + \dfrac{225}{2} = 150 \Rightarrow \dfrac{225}{R} = 37.5$ .
$R = 6\ \Omega$ , so the answer is (b) $6\ \Omega$ .

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