Lecture 28b - Magnetic Fields Motion of a charged particle...

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Magnetic Fields
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Motion of a charged particle in a constant B field F B is always perpendicular to v, so the particle goes in a circle °±² = ³´ = ³± 2 µ B F qv B  ¶ = ·¸ ¹º B into paper Because F B is always perpendicular to the motion, F B does no work on the particle – i.e. it cannot change its Kinetic Energy
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Three particles have identical charges and masses. They enter a constant magnetic field and follow the paths shown in the drawing. Which particle is travelling the fastest? A. 1 B. 2 C. 3 D. All have the same speed ° = ±² ³´
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4 A (+) charged particle with an initial speed v o is moving in a plane perpendicular to a uniform magnetic field (B into the page). There is a tenuous gas throughout the region which causes viscous drag and slows the particle over time. The path of the particle is B A: a spiral inward B: a spiral outward C: something else ° = ±² ³´
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A high energy photon enters a bubble chamber from above. It scatters an atomic electron and creates an electron(e-) positron(e+) pair.
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Lecture 28b - Magnetic Fields Motion of a charged particle...

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