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An electron enters a region of space containing a uniform 1.27×10^−5 T magnetic field. Its speed...

An electron enters a region of space containing a uniform 1.27×10^−5 T magnetic field. Its speed is 157 m/s and it enters perpendicularly to the field. Under these conditions, the electron undergoes circular motion. Find the radius ? of the electron's path and the frequency ? of the motion.

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