A charged particle moves through a magnetic field in a direction perpendicular to it. Then the (a) speed of the particle remains unchanged (b) direction of the particle remains unchanged (c) acceleration remains unchanged (d) velocity remains unchanged

Answer: (a). Force ⊥ velocity, so it only changes direction; work done is zero. Speed stays constant, while direction, velocity and acceleration vector keep changing (uniform circular motion). So the answer is (a) speed remains unchanged.

A charged particle moves through a magnetic field in a direction… | NEET 2003 (AIPMT)

Q120NEET 2003 · AIPMTEasy

Moving Charge in a Magnetic Field

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

Show answer and solution

Answer: (a)

Force $\perp$ velocity, so it only changes direction; work done is zero.
Speed stays constant, while direction, velocity and acceleration vector keep changing (uniform circular motion).
So the answer is (a) speed remains unchanged.

Report a mistake

Moving Charge in a Magnetic Field question from NEET 2003 (AIPMT)

More questions on Moving Charge in a Magnetic Field