Question

A conducting disk with radius aaa, thickness h , and resistivity ρ is inside a solenoid of circular cross section. The disk axis coincides with the solenoid axis. The magnetic field in the solenoid is given by B=bt, with b a constant.

Part A

Find the expression for the current density in the disk as a function of the distance r from the disk center.

Express your answer in terms of the variables a, b, h, ρ, and t.

j =

nothing

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Part B

Find the expression for the rate of power dissipation in the entire disk. Hint: Consider the disk to be made up of infinitesimal conducting loops.

Express your answer in terms of the variables a, b, h, ρ, and t.

P =

nothing

Answer 1

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