An electron moves with a speed of 3.5×10^7 m/s in the directions shown in the fi

Question

An electron moves with a speed of 3.5×10^7 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/1013299/15/jfk.Figure.24.P23.jpg

What is the magnitude of the magnetic force in figure (a)?
F = ____ N
What is the direction of the magnetic force in figure (a)?
choices:
+ z direction
- z direction
+ zy direction
- zx direction


What is the magnitude of the magnetic force in figure (b)?
F = ____ N
What is the direction of the magnetic force in figure (b)?
choices:
+ zy direction
- zy direction
+ z direction
- y direction

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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