Exercise Image: http://i42.tinypic.com/2wgc4up.jpg 1. A negatively charged parti

Question

Exercise Image: http://i42.tinypic.com/2wgc4up.jpg

1. A negatively charged particle is moving with a velocity v in a large homogeneous magnetic field as indicated. It will accelerate ... ?
a. out of the paper.
b. up.
c. down.
d. left.
e. into the paper.
f. right.
g. not at all.

2. The shape of its trajectory will be ... ?
a. parabolic, curving up.
b. straight, slowing down.
c. parabolic, curving down.
d. straight, speeding up.
e. circular, clockwise.
f. parabolic, curving into the paper.
g. circular, counter-clockwise.
h. straight, continuing at same speed.
i. parabolic, curving out of the paper.

3. If the field is 4 mT, the mass of the particle is 35·10^-9 kg, its initial speed 9 m/s, and its charge -5 µC, what is the magnitude of its acceleration?

4. What is the speed of the particle 1 seconds later?

Image of the Exercise: http://i42.tinypic.com/2wgc4up.jpg

Thanks!

Explanation / Answer

1. down
2.circular, counterclockwise.
3.Magnitude of acceleration:

a = qvB/m = 5.1429 m/s^2

4. Speed does not change so v = 9m/s

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