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A very long solenoid of circular cross section with radius r= 4.20cm has n= 90.0 turns/cm of wire. An electron is sitting outside the solenoid, at a distance r= 4.70 cm from the solenoid axis. What is the magnitude of the force on the electron while the current in the solenoid is ramped up at a rate of 26.0 Amps/second?

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