JAMB - Physics (2000 - No. 34)
A conductor of length 2m carries a current of 0.8A while kept in a magnetic field of magnetic flux density 0.5T. The maximum force acting on it is
0.2N
0.8N
3.2N
8.0N
Explication
The force on the conductor is maximum when the conductor lies perpendicular to the field during which the maximum force is given as;
F = ILB = 0.8 x 2 x 0.5 = 0.8N
F = ILB = 0.8 x 2 x 0.5 = 0.8N