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f. Which answers (a thru e) changes if the charge was negative instead of positive. Which answers do not change? only b will change g. Now assume the electric field is directed into the page, opposite the direction of B. Will the velocity selector still work? No

f. Which answers (a thru e) changes if the charge was negative instead of positive. Which answers do not change? only b will change g. Now assume the electric field is directed into the page, opposite the direction of B. Will the velocity selector still work? No

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f. Which answers (a thru e) changes if the charge was negative instead of positive. Which answers do not change? only b will change g. Now assume the electric field is directed into the page, opposite the direction of B. Will the velocity selector still work? No
Transcribed Image Text:f. Which answers (a thru e) changes if the charge was negative instead of positive. Which answers do not change? only b will change g. Now assume the electric field is directed into the page, opposite the direction of B. Will the velocity selector still work? No
A velocity selector is a device that only lets charges with a particular velocity through. F v Eb 1. The positive charge +q enters from the left with a speed v. The magnetic field B and electric field E are directed as shown. Neglect gravity. F. B What is the direction of the magnetic force on the positive charge (in/out/left/right/top/bottom/zero)? а. Bottom b. What is the direction of the electric force on the positive charge (in/out/left/right/top/bottom/zero)? top In what direction will the charge be deflected if it is moving very fast? Hint: only one of the forces depend on the speed of the charge. Think about which force will dominate when the charge is moving very fast. С. only the magnetic Force depends on speed so the charge will be deflected to bottom d. In what direction will the charge be deflected if it is moving very slowly? top There is only one speed where the charges will not be deflected. Find this speed in terms of E, B and/or q. Show work. Neglect gravity. е. F, -F, = 0 magnetic electric => qV B q E => V =
Transcribed Image Text:A velocity selector is a device that only lets charges with a particular velocity through. F v Eb 1. The positive charge +q enters from the left with a speed v. The magnetic field B and electric field E are directed as shown. Neglect gravity. F. B What is the direction of the magnetic force on the positive charge (in/out/left/right/top/bottom/zero)? а. Bottom b. What is the direction of the electric force on the positive charge (in/out/left/right/top/bottom/zero)? top In what direction will the charge be deflected if it is moving very fast? Hint: only one of the forces depend on the speed of the charge. Think about which force will dominate when the charge is moving very fast. С. only the magnetic Force depends on speed so the charge will be deflected to bottom d. In what direction will the charge be deflected if it is moving very slowly? top There is only one speed where the charges will not be deflected. Find this speed in terms of E, B and/or q. Show work. Neglect gravity. е. F, -F, = 0 magnetic electric => qV B q E => V =
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