Circular Motion of Charges in Magnetic Fields Video Lessons

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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:

F=qvB sin θ

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

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