Circular Motion of Charges in Magnetic Fields Video Lessons

Concept

# Problem: Three points are located in a uniform magnetic field as shown. The B field points into the screen. A. A positively charged particle is located at point A and is stationary. The direction of the magnetic force on the particle is: a. right b. left c. into the screen d. out of the screen e. Zero B. The positive charge moves from point A toward B. The direction of the magnetic force on the particle isa. right b. left c. into the screen d. out of the screen e. Zero

###### FREE Expert Solution

Magnetic force:

Right-hand rule for a positive moving charge:

Thumb points in the direction of the velocity. Fingers point in the direction of the magnetic field. Perpendicular to the thumb point in the direction of the motion.

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###### Problem Details

Three points are located in a uniform magnetic field as shown. The B field points into the screen.

A. A positively charged particle is located at point A and is stationary. The direction of the magnetic force on the particle is:

a. right

b. left

c. into the screen

d. out of the screen

e. Zero

B. The positive charge moves from point A toward B. The direction of the magnetic force on the particle is

a. right

b. left

c. into the screen

d. out of the screen

e. Zero