Question

When a charged particle moving with velocity `vec(V)` is subjected to a magnetic field of induction `vec(B)` the force on it is non-zero. This implies that:
A. Angles between `vec(v)` and `vec(B)` can have any value other than zero and `180^(@)`
B. Angle between `vec(v)` and `vec(B)` is either zero or `180^(@)`
C. Angle between `vec(v)` and `vec(B)` is necessarily `90^(@)`
D. Angle between `vec(v)` and `vec(B)` can have any value other than `90^(@)`

Answer 1

Correct Answer - A
`F_(m) = B q v sin theta`
if `F_(m) != 0, theta != (0^(@) or 180^(@))`