Calculate the emf induced between the ends of an axle of length 1.75 m of a railway carriage which runs on a level ground with a uniform speed of 80 km/h. [Take, `B=3.2 times 10^(-5)` Wb]

Explanation

Given, l = 1.75 m, `delta=60^(@)`
`v=80km//h=80 times 5/18m//s, B=3.2 times 10^(-5)" Wb and "epsilon=?`
`therefore` Induced emf, e = vBl `tandelta`
`" "=80/18 times 5 times 3.2 times 10^(-5) times 1.75 times tan60^(@)`
`" "=215.5 times 10^(-5)`
`" "=0.00215V approx 0.0022V`