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A charged particle with charge to mass ratio `((q)/(m)) = (10)^(3)/(19) Ckg^(-1)` enters a uniform magnetic field `vec(B) = 20 hat(i) + 30 hat(j) + 50 hat(k) T` at time t = 0 with velocity `vec(V) = (20 hat(i) + 50 hat(j) + 30 hat(k)) m//s`. Assume that magnetic field exists in large space.
During the further motion of the particle in the magnetic field, the angle between the magnetic field and velocity of the particle

A

remains constant

B

increases

C

decreases

D

may increase or decrease

Text Solution

Verified by Experts

The correct Answer is:
A
Angle remains constant, because magnitudes of components of velocites along and perpendicular to magnetic field remain constant.
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