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 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

Question: 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

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 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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