| In the graph variation of magnetic field with time 't' applied perpendicular to the plane of the ring is shown: |
 |
A) at \[t=2\sec \]and current flowing in ring is equal to zero
B) current will change its direction two times in time intervals \[t=0\] to \[t=8\,\,\sec \]
C) current will change its direction only once in the above interval
D) flux in ring is same at \[t=0\] & \[t=4\,\,\sec .\]
Correct Answer: C
Solution :
| For \[t=0\] to \[t=4:\frac{dB}{dt}\] is negative, and for \[t=4\] to \[t=8:\frac{dB}{dt}\]is positive. |
| \[\therefore \] sign of current will change only once. |
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