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A thin diamagnetic rod is place vertical...

A thin diamagnetic rod is place vertically between the poles of an electromagnet. Whenthe current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence, the rod gains gravitational potential energy. The work required to do this comes from

A

the current source

B

the magnetic field

C

the lattice structure of the material of the rod

D

the induced electric field due to the changing magnetic field

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The correct Answer is:
A
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