Physics · 2018
JEE Main · 15 April 2018, Shift 2 · Q29
A constant voltage is applied between two ends of a metallic wire. If the length is halved and the radius of the wire is doubled, the rate of heat…
A constant voltage is applied between two ends of a metallic wire. If the length is halved and the radius of the wire is doubled, the rate of heat developed in the wire will be :
Official answer
(4)
Increased $\displaystyle 8$ times
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JEE Main 2018 Physics question, with the answer from NTA’s final answer key. Where our answers come from.