A straight horizontal wire of length and mass rests on two parallel supports so that…
PHYSICS · Single correct · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
A straight horizontal wire of length 0.40m and mass 10g rests on two parallel supports so that it can move vertically. It is placed in a uniform horizontal magnetic field of 0.50T directed from west to east. What current (magnitude and direction) should be passed through the wire so that its weight is exactly supported and the wire just loses contact with the supports?
(a) 0.49A towards north
(b) 0.98A towards south
(c) 0.49A towards south
(d) 0.50A towards south