An Electron Moves in a Region Where the Magnetic Field $\mu$

question 46

Multiple Choice

An electron moves in a region where the magnetic field is uniform and has a magnitude of 80 $\mu$ T.The electron follows a helical path which has a pitch of 9.0 mm and a radius of 2.0 mm.What is the speed of this electron as it moves in this region?

• A)48 km/s
• B)28 km/s
• C)20 km/s
• D)35 km/s
• E)8.0 km/s

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