Chapter 4: Moving Charges and Magnetism - Assertion-Reason Quiz

Assertion (A): An electron moving vertically downward in a horizontal northward magnetic field is deflected toward the east. Reason (R): For an electron moving downward (–z) in a northward field (+y), v × B = –ẑ × ŷ = x̂, and since the electron has negative charge, the force is in the –x (west) direction.

Review the options below and lock in the strongest answer.