Physics · 2012
NEET 2012 · Prelims · Code A · Q21
A coil of resistance 400 Ω is placed in a magnetic field. If the magnetic flux φ( wb ) linked with the coil varies with time t (sec) as φ=50 t^2+4.…
A coil of resistance $\displaystyle 400 \Omega$ is placed in a magnetic field. If the magnetic flux $\displaystyle \phi(\mathrm{wb})$ linked with the coil varies with time t (sec) as
$$\phi=50 \mathrm{t}^2+4 .
$$
The current in the coil at $\displaystyle \mathrm{t}=2 \mathrm{sec}$ is :
Official answer
(3)
0.$\displaystyle 5$ A
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NEET (UG) 2012 Physics question, with the answer from NTA’s final answer key. Where our answers come from.