Question

A metal sheet is placed in front of a strong magnetic pole. A force is needed to

(a) hold the sheet there if the metal is magnetic

(b) hold the sheet there if the metal is nonmagnetic

(c) move the sheet away from the pole with uniform velocity if the metal is magnetic

(d) move the sheet away from the pole with uniform velocity if the metal is nonmagnetic. Neglect any effect of paramagnetism, diamagnetism and gravity.

Answer 1

The correct answer is (a) (c) (d)

(a) hold the sheet there if the metal is magnetic

(c) move the sheet away from the pole with uniform velocity if the metal is magnetic

(d) move the sheet away from the pole with uniform velocity if the metal is nonmagnetic. Neglect any effect of paramagnetism, diamagnetism and gravity.