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Electric Charges and Fields
Question
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A train is moving with uniform velocity from north to south. Will any induced emf appear across the ends of the axle?

Answer

Yes, the vertical component of earth's magnetic field shall induce emf.

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Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point? 

Figure shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio?