Question

A long solenoid has 100 turns/cm and carries current i. An electron moves within the solenoid in a circle of radius 3.24 cm perpendicular to the solenoid axis. The speed of the electron is 0.0469c (c = speed of light, equal to 2.998 × 108 m/s). Find the current i in the solenoid.

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Magnetic Effects of Current

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