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Q. An aeroplane having a wing space of 35 m files due to north with the speed of 90 m/s given B is $ 4\times {{10}^{-5}}T. $ The potential difference between the tips of the wings will be

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Solution:

$ I=35\,m $ $ v=90\,m\text{/}s $ $ emf=Bvl=4\times {{10}^{-5}}\times 90\times 35 $ $ =0.126\,V $