When a magnet is pushed in and out of a circular coil C connected to a very sensitive galvanometer G as shown in the adjoining diagram with a frequency v, then

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Constant deflection is observed in the galvanometer

Visible small oscillations will be observed in the galvanometer if v is about 50 Hz

Oscillations in the deflection will be observed clearly if v=1 or 2 Hz

No variation in the deflection will be seen if v=1 or 2 Hz

answer is C.

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Detailed Solution

When frequency is high, the galvanometer will not show deflection. Oscillation in the defection will be seen clearly when f =1or 2Hz

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