Rotating Metal Bar in Magnetic Field · CAP 2000 #7
Physics · electromagnetism
Problem
A metal bar rotates about a vertical axis which passes through the center of the bar. The axis of rotation is perpendicular to the length of the bar. There is a uniform magnetic field in the vertical direction. The emf (or potential difference) induced between the two ends of the bar is,
(a) zero.
(b) a sinusoidally oscillating value.
(c) a non-zero positive value.
(d) a non-zero negative value.