Two parallel rails of a railway track insulated from each other and with the ground are connected to a millivoltmeter. The distance between the rails is one metre. A train is travelling with a velocity of $72\,\,km{{\rm{h}}^{ - 1}}$ along the track. The reading of the millivotmeter (in ${\rm{mV}}$) is : (Vertical component of the earth’s magnetic induction is $2\,\, \times {10^{ - 5}}\,{\rm{T}})$Failed to load question data. Please try again later.
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