Question

A charge particle moves in a uniform magnetic field. The velocity of the particle at some instant makes right angle with the magnetic field. The path of the particle will be

• A. A straight line
• B. A circle
• C. Any curved path
• D. Zig-zag

Answer 1

Answer: (B)

A circle

Given

A charged particle moving with constant velocity 'v'.

At some boint it is perpendicular to magnetic field B

Solution

To know path of particle we need to know the direction of force on that particle because of magnetic field

F=qvBsin$\theta$

Here theta is 90

Therefore the path will be circular.

The correct option is B