Question

A particle having specific charge α moves with a velocity v = v₀î in a magnetic field vector B = B₀/√2(J + K).  It is observed that the 

(a) path of the particle is a helix 

(b) path of the particle is a circle

(c) distance moved by particle in time

(d) velocity of particle after time 

Answer 1

Correct option: (b,c)

Explanation: 

Therefore path f the particle is a circle. In magnetic field speed of particle remains constant. 

Therefore , distance moved by the particle in time

since the magnitude of velocity remains same in the magnetic field. This is true but will not help us to conclude whether (d) is correct or false.