Two rails of a railway track insulated from each other and the ground are connected to a milli voltmeter. What is the reading of voltmeter, when a train travels with a speed of 180 km/hr along the track. Given that the vertical component of earth's magnetic field is \[0.2\times {{10}^{-4}}weber/{{m}^{2}}\] and the rails are separated by 1 metre [IIT 1981; KCET 2001]

• A.            \[{{10}^{-2}}volt\]              
• B.            \[{{10}^{-4}}volt\]
• C.            \[{{10}^{-3}}volt\]              
• D.            1 volt