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The variation of induced emf `(F)` with time `(t)` in a coil if a short bar magnet is moved along its axis with a constant velocity is best represent

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The variation of induced emf `(F)` with time `(t)` in a coil if a short bar magnet is moved along its axis with a constant velocity is best represent as
image
B. image
C. image
D. image
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As the magnet moves towards the coil, the magnetic flux increase (nonlinearly). Also there is a change in polarity of induced emf when the magnet passes on to the other side of the coil.
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