What is the magnitude of the force per meter of length on a

What is the magnitude of the force per meter of length on a straight wire carrying an 6.50-A current when perpendicular to a 0.55-T uniform magnetic field?

Solution

equation for force acting on a current carring conductor placed in a magnetic field is

F = BiL sin (theta )

F/ L = Bi sin (theta )

= 0.55 *6.50 sin (90 )

= 3.575 N / m