A proton moves with a speed of 1.0 x 10^7 m/s in the directions shown in the fig

Question

A proton moves with a speed of 1.0 x 10^7 m/s in the directions shown in the figure. A 0.50 T magnetic field points in the positive x-direction. http://session.masteringphysics.com/problemAsset/1013298/11/jfk.Figure.24.P22.jpg

What is the magnitude of the magnetic force "vec F" on the proton in figure (a)?
F = _____ N
What is the direction of the magnetic force "vec F" on the proton in figure (a)?
choices:
+ x direction
+ y direction
+ yz direction
- xy direction
magnetic force is zero



What is the magnitude of the magnetic force "vec F" on the proton in figure (b)?
F = _____ N
What is the direction of the magnetic force "vec F" on the proton in figure (b)?
choices:
+ x direction
+ y direction
+ yz direction
- xy direction
magnetic force is zero

Explanation / Answer

a) magnitude of magnitic force is F = qVB sin

   F = 1.6*10^-19 * 1*10^7* 0.5

F = 0.8* 10^-12 N

B) IN Y Direction.

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