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NEET2018PhysicsMagnetic Properties of MatterActual

A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the 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

Options

  1. AThe lattice structure of the material of the rod
  2. BThe magnetic field
  3. CThe current source
  4. DThe induced electric field due to the changing magnetic field

Correct answer

C. The current source

Step-by-step solution

The work required to lift must be coming from the current source which is causing the current to blow through electromagnet.

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