A magnet is dropped down an infinitely long vertical copper tube

Options

A. The magnet moves with continuously increasing velocity and ultimately acquires a constant terminal velocity
B. The magnet moves with continuously decreasing velocity and ultimately comes to rest
C. The magnet moves with continuously increasing velocity but constant acceleration
D. The magnet moves with continuously increasing velocity and acceleration

Answer

B

Explanation

The eddy current produced in the copper tube will oppose the downward motion of the magnet.