Question

If a charged particle is projected perpendicular to uniform magnetic field, then,
a) force experienced will be perpendicular to the magnetic field and initial velocity.
b) force experienced will be perpendicular to the magnetic field and instantaneous velocity.
c) the work done by the magnetic field is zero.
d) the particle experiences both radial and tangential accelerations.

• A. a, b, c are correct d is wrong
• B. all are correct
• C. a, b are correct, c, d are wrong
• D. a, b, c are wrong, d is correct

Answer 1

The correct option is A a, b, c are correct d is wrong

Force $=q(\overrightarrow{V}\times \overrightarrow{B})$
So, force is perpendicular to the magnetic field and initial velocity as well as instantaneous velocity.
Work done by magnetic field is always zero on charge particle because direction of force and displacement of particle is always perpendicular, so, F.S = 0. In magnetic field particle experiences only radial acceleration.