- 2019:
The correct answer is (C).
The frequency of rotation of a charged particle in a uniform magnetic field is given by:
f = (qB)/(2πm)
If the speed of the particle is doubled and the direction of the magnetic field is reversed, the frequency of rotation will remain the same.
- 2018:
The correct answer is (A).
The magnetic force acting on a charged particle moving in a uniform magnetic field is given by:
F = qvB
- 2017:
The correct answer is (C).
The magnetic force acting on a charged particle moving in a magnetic field is given by:
F = qvB
If the velocity of the particle is doubled, the magnetic force acting on the particle will become four times.
