The magnetic force on a charge q moving with velocity v in magnetic field B is:
AF = q v · B
BF = q B
CF = q v × B
DF = q (v + B)
Answer & Solution
Correct answer: C. F = q v × B
1. Lorentz magnetic force: F = q v × B (cross product).
2. Magnitude: F = q v B sinθ. Maximum at θ = 90°, zero when v ∥ B.
3. Direction by right-hand rule. Force is ⊥ to both v and B.
_Source: NCERT Class 12 Physics Ch 4 §4.2 Magnetic Force_
Related questions
Certain galvanometers use eddy currents to provide electromagnetic:The SI unit of inductance is the:Eddy current flow patterns are said to resemble swirling eddies in:Foucault lived from 1819 until:Who discovered eddy currents?Swirling induced currents in a metal plate are called:What in Faraday's equation represents Lenz's law?Lenz's law says the induced current opposes the change in: