A 10cm long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. The total resistance of the wire and rail is 0.35 Ω. Pulling the wire with a force of 1.0 N causes 4.0 W of power to be dissipated in the circuit. a. What is the speed of the wire when pulled with a force of 1.0 N?
b. What is the strength of the magnetic field?

a)  

b)  

Explanation:

From the question we are told that:

Wire Length

Resistance

Force

Power

a)

Generally the equation for Power is mathematically given by

Therefore

b)

Generally the equation for Magnetic Field is mathematically given by

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