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A coil has an area of 0.05m^(2) and ...

A coil has an area of `0.05m^(2)` and has 800 turns . After placing the coil in a magnetic field of strenght `4 xx 10 ^(-5) Wbm^(-2)` , perpendicualar to the field , the coils id rotated by `90^(@)` in `0.1 s` . The value of average emf induced is

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