Physics · 2021
JEE Main · 25 February 2021, Shift 1 · Q23
A coil of inductance 2 H having negligible resistance is connected to a source of supply whose voltage is given by V =3 t volt. (where t is in…
A coil of inductance $\displaystyle 2$ H having negligible resistance is connected to a source of supply whose voltage is given by $\displaystyle \mathrm{V}=3 \mathrm{t}$ volt. (where t is in second). If the voltage is applied when $\displaystyle \mathrm{t}=0$, then the energy stored in the coil after $\displaystyle 4$ s is \_\_\_\_J.
Official answer
144
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.