Ratio of thermal energy released in two resistors R and 3R… — JEE Main 2023 Physics PYQ

JEE Main 2023 · 29 Jan · Shift 1

Ratio of thermal energy released in two resistors R and 3R connected in parallel in an electric circuit is :

A.
$3:1$
B.
$1:1$
C.
$1:27$
D.
$1:3$

Show answer and solution

Correct option: A

Solution

In parallel, voltage across both resistors is the same (V). Power dissipated is P = V²/R, so thermal energy is inversely proportional to resistance. Therefore, energy ratio E_R : E_3R = (1/R) : (1/3R) = 3 : 1.

[JEE Main 2023 · 29 Jan · Shift 1]

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