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Question:

The Physics , induced currents?

The field in a solenoid is 0.5 T when it is in a vacuum, a rod is place inside the solenoid,and the field drops to 0.498 T ,what is the magnetic constant of the material? , what kind of magnetic material is the rod made of?

Answer:

B1 mu0 * N * I B2 mu * mu0 * N * I, where mu - magnetic constant of the material. mu B2/B1 0.498/0.5 0.996 The rod made of diamagnet. Good luck!
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