JAMB - Physics (2003 - No. 36)
The force on a charge moving with velocity v in a magnetic field B is half of the maximum force when the angle between v and B is
90o
45o
30o
0o
Vysvětlení
the force on a moving charge in a magnetic field is given by: F = q V β sin θ
and this force is maximum when θ = 90o, during which sin 90o = 1: and for sinθ = 0.5, θ = 30o
and this force is maximum when θ = 90o, during which sin 90o = 1: and for sinθ = 0.5, θ = 30o