A straight copper wire is kept parallel to a uniform magnetic field of
MATHEMATICS · Single correct · ISC · Mathematics · Physics · Magnetic Effects of Current and Magnetism
Problem
A straight copper wire is kept parallel to a uniform magnetic field of 0.2T. How does the magnitude of the magnetic force on the wire now compare with the force when the same wire is kept perpendicular to the field, all other conditions remaining identical?
(a) It remains unchanged.
(b) It becomes half of the earlier value.
(c) It becomes zero.
(d) It becomes twice the earlier value.