EAMCET Engineering 2005 Solved Paper

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 72‌km∕h along the track. The reading of the millivoltmeter (in mV) is (vertical component of the earth's magnetic induction is 2×10−5T )