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A long solenoid has 78 turns/cm and carries current i. An electron moves within the solenoid in a circle of radius 3.13 cm
perpendicular to the solenoid axis. The speed of the electron is 0.0359c (c = speed of light, equal to 2.998 × 10° m/s). Find the
current i in the solenoid.
Number
i
Units

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