At a particular instant,a proton moves toward the east in a uniform magnetic field that is directed straight downward.The magnetic force that acts on it is
A)zero.
B)upward.
C)toward the north.
D)toward the south.
E)downward.

Question

Quizplus · Accepted Answer

The magnetic force on a charged particle moving in a magnetic field is given by the Lorentz force law, which is perpendicular to both the velocity of the particle and the magnetic field direction. Since the proton is moving east and the magnetic field is downward, the magnetic force, according to the right-hand rule, will be toward the north.

At a Particular Instant,a Proton Moves Toward the East in a Uniform