First slide
Magnetic Flux
Question

A square of side L meters lies in the x-y plane in a region, where the magnetic field is given by B=B0(2i^+3j^+4k^ )T,
where B0 is constant. The magnitude of flux (in Wb) passing through the square is :

Easy
Solution

ϕ=B.dA=B02i^+3j^+4k^.L2 k^=4B0L2

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