Consider an electromagnet which is placed inside a conducting shell.

Bierlehre59

Bierlehre59

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2022-08-13

Consider an electromagnet ( I can change the current in electromagnet and hence its magnetic field) which is placed inside a conducting shell. A large current flows through the electromagnet and it produces a large magnetic field. Now I keep on changing the current in the electromagnet (somehow very quickly ).

Answer & Explanation

pokajalaq1

pokajalaq1

Beginner2022-08-14Added 18 answers

If the magnetic field changes with time then it will induce eddy currents in the conducting shell, which dissipate energy as heat. The fact that the total magnetic flux through the shell is zero is irrelevant. Heating effects ( I 2 R) do not depend on the direction of the eddy currents.

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