Physics · 2021
JEE Main · 26 February 2021, Shift 2 · Q20
A wire of 1 Ω has a length of 1 m. It is stretched till its length increases by 25 %. The percentage change in resistance to the nearest integer is:
A wire of $\displaystyle 1 \Omega$ has a length of $\displaystyle 1$ m . It is stretched till its length increases by $\displaystyle 25 \%$. The percentage change in resistance to the nearest integer is :
Official answer
(2)
$\displaystyle 56$%
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.