d. In what direction will the charge be deflected if it is moving very slowly? e. There is only one speed where the charges will not be deflected. Find this speed in terms of E, 8 and/or q. Show work. Neglect gravity. f. Which answers (a thru e) changes if the charge was negative instead of positive. Which answers do not change?
d. In what direction will the charge be deflected if it is moving very slowly? e. There is only one speed where the charges will not be deflected. Find this speed in terms of E, 8 and/or q. Show work. Neglect gravity. f. Which answers (a thru e) changes if the charge was negative instead of positive. Which answers do not change?
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Transcribed Image Text:works.
Avelocity selector is a device that only lets charges with a particular
velocity through.
1. The positive charge + enters from the left with a speed y. The
magnetic field 8 and electric field & are directed as shown.
Neglect gravity.
B
16
d. In what direction will the charge be deflected if it is moving very slowly?
[21
a. What is the direction of the magnetic force on the positive
charge (in/out/left/right/top/bottom/zero)?
b. What is the direction of the electric force on the positive charge (in/out/left/right/top/bottom/zero)?
C. In what direction will the charge be deflected if it is moving very fast? Hint: only one of the forces depend on teh
speed of the charge. Think about which force will dominate when the charge is moving very fast.
e. There is only one speed where the charges will not be deflected. Find this speed in terms of E, 8 and/or q.
Show work. Neglect gravity.
f. Which answers (a thru e) changes if the charge was negative instead of positive. Which answers do not
change?
8.
Now assume the electric field is directed into the page, opposite the direction of B. Will the velocity selector
still work?
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