In 17 micros an electron moves15 cm in the direction of a, Ask an Expert

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In 1.7 µs, an electron moves15 cm in the direction of a 0.09 T magnetic field. The electron's velocitycomponents perpendicular and parallel to the field are equal.
(a) What is the length of its actual spiraltrajectory?
(b) How many orbits about the field directiondoes it complete?

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