A conducting disk with radius a, thickness h, and resistivity p 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 ba 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, o, and t. j = 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 conductina loops.

A conducting disk with radius a, thickness h, and resistivity p 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 ba 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, o, and t. j = 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 conductina loops.