Question

Force on a charge ‘q’ moving with a velocity ‘v’ in a magnetic field is given by F = qvB. State true or false.

(a) True

(b) False

The question was posed to me by my college director while I was bunking the class.

My question is from Motion in a Magnetic Field in section Moving Charges and Magnetism of Physics – Class 12

Answer 1

Right answer is (b) False

Explanation: Force on a charge ‘q’ moving with a velocity ‘v’ in a magnetic field is given by:

 F = qvB sinθ.

The direction of the force is given by Fleming’s left-hand rule.