An electron moves on a straight line path YY' as shown in figure. A coil is kept on the right such that YY' is in the plane of the coil. At the instant when the electron gets closest to the coil (neglect self-induction of the coil),
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a
the current in the coil flows clockwise
b
the current in the coil flows anticlockwise
c
the current in the coil is zero
d
the current in the coil does not change the direction as the electron crosses Point O
answer is C.
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Detailed Solution
When the electron is closest, flux due to magnetic field of electron's motion is maximum through the loop. So slope of flux-time graph will be zero or induced emf will be zero.