Physics · 2022
JEE Main · 26 June 2022, Shift 1 · Q55
A 10 Ω, 20 mH coil carrying constant current is connected to a battery of 20 V through a switch. Now after switch is opened current becomes zero in…
A $\displaystyle 10 \Omega, 20 \mathrm{mH}$ coil carrying constant current is connected to a battery of $\displaystyle 20$ V through a switch. Now after switch is opened current becomes zero in $\displaystyle 100 \mu \mathrm{~s}$. The average e.m.f. induced in the coil is \_\_\_\_ V.
Official answer
400
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.