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Can you cause a current to flow with the bar magnet held and/or moved alongside the...

Can you cause a current to flow with the bar magnet held and/or moved alongside the coil rather than being inserted into it or removed from inside it? Can you cause a current to flow with the solenoid located outside of the 400 turn coil?

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Answer #1

We can induce current (or induced emf) by changing the magnetic flux.

Magnetic flux through a coil due to a magnet or solenoid is given by = B.A

Or = BAcos, here B is magnetic field of bar magnet or sosolenoid which is constant because wwe can not move the magnet.

A is area of coil

is angle between area vector and B vector.

Induced current is given by

I = (1/R)d/dt= (1/R)BA(dcos)/dt

So if we change the angle between magnetic field and area vector then there will be induced current.

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