loud speaker problem (1 Viewer)

[red802]

a moving coil loudspeaker contains a coil of wire of 60turn, each of radius 1.5cm placed in a radial field of flux density 0.40T. the wire of the coil is at right angles to magnetic field at all times. when there is a current of 0.25A in the wire, what is the magnitude of the force on the coil

can someone solve this problem

 

[richz]

dont u just use F=nBIL

n=60 (no. of turns)
B = 0.40T
I= 0.25A
L=2(1.5*10^-2)m u have to change it to m (SI units) and also diameter

F= 0.18 N

hope it helps