Physics · 2018
JEE Main · 16 April 2018, Shift 1 · Q15
A heating element has a resistance of 100 Ω at room temperature. When it is connected to a supply of 220 V, a steady current of 2 A passes in it and…
A heating element has a resistance of $\displaystyle 100 \Omega$ at room temperature. When it is connected to a supply of $\displaystyle 220$ V, a steady current of $\displaystyle 2$ A passes in it and temperature is $\displaystyle 500$°C more than room temperature. What is the temperature coefficient of resistance of the heating element ?
Official answer
(4)
$\displaystyle 2 \times 10^{-4}{ }^{\circ} \mathrm{C}^{-1}$
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JEE Main 2018 Physics question, with the answer from NTA’s final answer key. Where our answers come from.