Question

A charged particle enters into a uniform magnetic field the parameter that remains constant is

• A. velocity
• B. momentum
• C. kinetic energy
• D. angular velocity

Answer 1

Answer: (C)

kinetic energy

Since the force on the charge is always normal to the velocity of the charge so, field does not work on the particle and the magnitude of velocity remains same. So, kinetic energy is same, whereas velocity changes direction. So, velocity, momentum and angular velocity changes.