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
A
90o
B
45o
C
30o
D
0o
Verified Correct Answer: C.
Physical Principles & Numerical Solution
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
Source: Myschool Past Questions Archive (Record #12757)