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A pair of parallel conducting rails is separated by 55.0 cm. They are joined at

ID: 2027856 • Letter: A

Question

A pair of parallel conducting rails is separated by 55.0 cm. They are joined at one end by a circuit component containing a light bulb with resistance 144 O. A transverse rod completes the circuit, sliding down the rails away from the bulb at a speed of 3.25 cm/s. Finally, the whole apparatus is located in a uniform magnetic field perpendicular to the plane of the circuit, and having a strength of 7.44 T. There is an induced emf in the circuit causing the bulb to glow. How much power is being consumed by the bulb?

Not sure if I'm converting something wrong. I got 1.23e-6 which is incorrect.

Explanation / Answer

emf=B*l*v=0.13299 volts power=v^2/r=1.2282*10^(-4) Watts

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