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EMF induced by train's axles

An engineer plans to light a train by utilizing the emf induced in the axles of the train running on the tracks.

a. If the downward component of the earth's magnetic field is 0.6 X 10^-4 T, and the tracks are 1.5m apart, how large is the emf produced between the tracks by a train traveling at 40 m/s?

b. Could this voltage be utilized on the moving train? The answer is Yes, but how

c. Could the voltage be utilized at a train station at the distant end of the tracks? I would think Yes again, but how?

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Solution Summary

Could the voltage induced between train's axles due to earth's magnetic filed be utilized? Answer is provided in a discussion format, along with two diagrams.