Applying the y right hand rule leads to a b field

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Unformatted text preview: pTest Magnetic A proton beam enters into a proton magnetic field region as shown below. What is the direction of the magnetic field B? a) + y b) – y b) c) + x c) d) + z (out of page) d) e) – z (into page) e) The picture shows the force acting in the +y direction. Applying the y right-hand rule leads to a B field that points into the page. The B into field must be out of the plane out because B ⊥ v and B ⊥ F. Follow-up: What would happen to a beam of atoms? x ConcepTest 5.4a Mass Spectrometer I Mass Two particles of the same mass Two same enter a magnetic field with the same speed and follow the paths same shown. Which particle has the bigger charge? bigger c) both charges are equal d) impossible to tell from the picture ConcepTest 5.4a Mass Spectrometer I ConcepTest Mass Two particles of the same mass Two same enter a magnetic field with the same speed and follow the paths same shown. Which particle has the bigger charge? bigger c) both charges are equal d) impossible to tell from the picture The relevant equation for us is: According to this equation, the R= mv qB bigger the charge, the smaller the radius. Follow-up: What is the sign of the charges in the picture? ConcepTest 5.4b Mass Spectrometer II Mass A proton enters a uniform proton magnetic field that is perpendicular to the proton’s velocity. What happens to the kinetic energy of the proton? energy a) it increases a) b) it decreases c) it stays the same d) depends on the velocity direction e) depends on the B field direction e) xxxxxxxxxxx x xxxxxxxxxxx x xxxxxxxxxxx x xxxxxxxxxxx x xxxxxxxxxxx ConcepTest 5.4b Mass Spectrometer II Mass A proton enters a uniform proton magnetic field that is perpendicular to the proton’s velocity. What happens to the kinetic energy of the proton? energy The velocity of the proton changes direction but the direction magnitude (speed) doesn’t magnitude change. Thus the kinetic energy stays the same. energy a) it increases b) it decreases c) it stays the same d) depends on the velocity direction e) depends on the B field direction e) xxxxxxxxxxx x xxxxxxxxxxx x xxxxxxxxxxx x xxxxxxxxxxx x xxxxxxxxxxx ConcepTest 5.5 Vel...
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This note was uploaded on 02/06/2014 for the course PHYS 101 taught by Professor Young during the Spring '11 term at Nicholls State.

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