Question

A charged particle moves through a magnetic field in a direction perpendicular to it. Then

• A. speed of the particle remains unchanged
• B. direction of the particle remains unchanged
• C. acceleration remains unchanged
• D. velocity remains unchanged

Answer 1

The correct option is A speed of the particle remains unchanged

If a moving charged particle is subjected to a perpendicular uniform magnetic field, then according to$F=qvB\sin \left(\theta \right),$ it will experience a maximum force which acts as a centripetal force to particle and it will follow a circular path with uniform speed.