Question

Which of the following statement is true

• A. The presence of a large magnetic flux through a coil maintains a current in the coil if the circuit is continuous
• B. A coil of a metal wire kept stationary in a non-uniform magnetic field has an e.m.f. induced in it
• C. A charged particle enters a region of uniform magnetic field at an angle of $85 ^ { \circ }$ to the magnetic lines of force; the path of the particle is a circle
• D. There is no change in the energy of a charged particle moving in a magnetic field although a magnetic force is acting on it

Answer 1

Answer: (D)

There is no change in the energy of a charged particle moving in a magnetic field although a magnetic force is acting on it

Answer 2

When charged particle enters perpendicularly in a magnetic field, it moves on a circular path with a constant speed. Hence its kinetic energy also remains constant