Question

At which angle must a charged particle be moving to experience no magnetic force?

A. 180° to the magnetic field

B. 145° to the magnetic field

C. 45° to the magnetic field

D. 90° to the magnetic field

Answer 1

180° to the magnetic field

Step-by-step explanation:

Quiz verified

Answer 2

The correct option is (A) i.e. 180° to the magnetic field.

Step-by-step explanation:

The magnetic force on a charged particle is given as: F = qvBsinФ
B is the magnetic field.
q is the charge on the particle.
v is the velocity of the charged particle.
Ф is the angle between magnetic field (B) & the velocity of charge (v).


⇒ F = qvb sin Ф

When Ф = 180,
& sin Ф = 0
⇒ F = 0

therefore, there is no magnetic force when the magnetic field is parallel or anti-parallel to the velocity of the particle.