A) 0.5 A
B) 0.1 A
C) 2 A
D) 1 A
Correct Answer: A
Solution :
Induced emf of coil\[E={{\left| -\frac{d\phi }{dt} \right|}_{t}}\] Given, \[\phi =50{{t}^{2}}+4\] and \[R=400\,\Omega \] \[E={{\left| -\frac{d\phi }{dt} \right|}_{t=2}}\] \[=|100t{{|}_{t=2}}=200\,V\] Current in the coil \[i=\frac{E}{R}=\frac{200}{400}\] \[=\frac{1}{2}=0.5A\]You need to login to perform this action.
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