A short bar magnet passes at a steady speed

Asked by admin @ 20/08/2021 in Physics viewed by 335 People

A short bar magnet passes at a steady speed right

through a long solenoid. A galvanometer isconnected across the solenoid. Which graph bestrepresents the variation of the galvanometerdeflection with time t?

Answered by admin @ 20/08/2021

Answer:

The field produced by the bar magnet is non uniform. As we move the magnet towards the coil the flux would increase to a certain value. The direction of current will be such that the north pole will be formed at the point of entry to the solenoid. After the magnet enters, the current falls down and when the magnet completely inside the solenoid current becomes zero.

As we leaves the solenoid the leaving end becomes north and the direction of current becomes negative. Then the current will rise to attain a maximum value and falls down to zero

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