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Strength of the Magnetic Field

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October 11th, 2022

A 10 cm long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. The total resistance of the wire and rail is 0.20 ohms. Pulling the wire with a force of 1.oN causes 4.0 W of power to be dissipated in the circuit. A) What is the speed of the wire when pulled with 1.0N? B) What is the strength of the magnetic field?

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