I need help with the question listed above. The answer is included. I need help

Question

I need help with the question listed above. The answer is included. I need help solving the problem so I can get the correct answer. Please show a detailed explanation. I need help with the question listed above. The answer is included. I need help solving the problem so I can get the correct answer. Please show a detailed explanation.

Explanation / Answer

The radius of the path r = m v / qe B Where 0.5mv^2 = eV ==> v = [2 e V / m]^1/2 Therefore r = m [2 e V/m]^1/2 / e B = [2 m e V]^1/2 / eB = [ 2 m V / e ]^1/2 / B The frequency of the electron is f = v / 2 * pi * r = v e B / 2 * pi * m v = e B / 2 * pi * m Time period T = 2 * pi * m / e B

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