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A 10.0 cm long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. The total electrical resistance of the wire and the rail is 0.20 Ω. Pulling the wire at a steady speed of 4.0 m/s causes 4.0 W of power to be dissipated in the circuit. (a) How big is the pulling force? (b) What is the strength of the magnetic field?

A 10.0 cm long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. The total electrical resistance of the wire and the rail is 0.20 Ω. Pulling the wire at a steady speed of 4.0 m/s causes 4.0 W of power to be dissipated in the circuit. (a) How big is the pulling force? (b) What is the strength of the magnetic field?

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  1. ( 5 points) A 10.0 c m long wire is pulled along a U -shaped conducting rail in a perpendicular magnetic field. The total electrical resistance of the wire and the rail is 0.20 Ω . Pulling the wire at a steady speed of 4.0 m / s causes 4.0 W of power to be dissipated in the circuit. (a) How big is the pulling force? (b) What is the strength of the magnetic field?

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