1.

An aeroplane, with wingspan 60 m, is flying horizonally due north at 900 km/h at a location where the vertical component of the Earth's magnetic field is 20 mu T. The potential difference developed between its wing-tips is

Answer»

0.03 V
0.052 V
0.3 V
0.52 V.

Solution :`" INDUCED emf, "|E|=(dPhi_(m))/(dt)=B_(v)(LV)`
`=(20xx10^(-6))(60)(250)=3xx10^(5)xx10^(-6)V`
`(because 900 km//h)=900xx(5)/(18)=250 m//s).`


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