Question

An electron at point A in the figure has a speed vo of 1.41 x 106...

An electron at point A in the figure has a speed vo of 1.41 x 106 m/s. Find (a) the magnitude and direction of the magnetic field that will cause the electron to follow the semicircular path from A to B the diaimeter of the semicircular is 10cm and (b)the time required for the electron to move from A to B. (c) What magnetic field would be needed if the particle were a proton instead of an electron?

what is part C

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