Please answer the two questions seperatly The magnetic field at the surface of t

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Please answer the two questions seperatly

The magnetic field at the surface of the Earth varies a bit, but suppose where you are it happens to be 0.45 micro Tesla in magnitude and pointing due North. If you throw a steel ball with 866.2 Coulombs of charge on it at {v} m/s due East, how many Newtons of force will the magnetic force exert on it in the upward (away from the center of the Earth) direction? Answer: A 10-cm long solenoid is constructed out of 7744.7 turns of copper wire with a total resistance of 62.2 ohms. What is the magnitude of the magnetic field at the center of the solenoid, in Teslas, if a potential of 6.8 Volts is applied across the solenoid? Answer:

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