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Question

The force acting on a charge q moving with a velocity V in a magnetic field of induction B is given by :
  1. q(V×B)
  2. (V.B)q
  3. V×Bq
  4. qV×B

A
q(V×B)
B
qV×B
C
(V.B)q
D
V×Bq
Solution
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The magnetic force on a free moving charge is perpendicular to both the velocity of the charge and the magnetic field with direction given by the right hand rule . The force is given by the charge times the vector product of velocity and magnetic field.

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