Question:
A tightly-wound, long solenoid carries a current of $2.00 \mathrm{~A}$. An electron is found to execute a uniform circular motion inside the solenoid with a frequency of $1.00 \times 10^{8} \mathrm{rev} / \mathrm{s}$. Find the number of turns per meter in the solenoid.
Solution:
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