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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.

Asked in JEE Main 29th June 2nd Shift 2022 · Lorentz force and work done

• (1) Both Statement I and Statement II are correct.
• (2) Both Statement I and Statement II are incorrect.
• (3) Statement I is correct but Statement II is incorrect.
• (4) Statement I is incorrect but Statement II is correct.

Step-by-step solution

Why the other options are wrong

• (1) Swaps the directions: electric force is along the field, magnetic force is perpendicular to it.
• (2) Rejects Statement I, forgetting that a magnetic force perpendicular to velocity does no work.
• (4) Believes the magnetic force can do work and mixes up both force directions.

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