Moving Charge in a Magnetic Field
Given below are two statements:
Statement I: The electric force changes the speed of the charged particle and hence changes its kinetic energy; whereas the magnetic force does not change the kinetic energy of the charged particle.
Statement II: The electric force accelerates the positively charged particle perpendicular to the direction of electric field. The magnetic force accelerates the moving charged particle along the direction of magnetic field.
In the light of the above statements, choose the most appropriate answer from the options given below:
Show answer and solution
Answer: (c)
- Statement I: electric force can do work and change speed and KE; magnetic force does no work. Correct.
- Statement II: electric force on a positive charge is along , not perpendicular; magnetic force is perpendicular to , not along it. Incorrect.
- So the answer is (c).