Home › JEE Advanced › Physics › Electromagnetism › A charged particle q is held at rest in vertical…
A charged particle q is held at rest in vertical equilibrium in a uniform electric field E pointing upward. Charge-to-mass ratio q/m:
Ag/E
BE/g
CgE
DΕ/g²
Answer & Solution
Correct answer: A. g/E
For equilibrium: qE = mg (electric force up = gravity down). So q/m = g/E. The particle is essentially 'levitated' by the field.
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: