1.

A magnetic field in a certain region is given by vecB = (40hatî - 18 hatk)G. How much flux passesthrough a 5.0 "cm"^2 area of the loop, if the loop lies flat on the XY Plane ? 1G (gauss) =10^(-4) T.

Answer»

`-900` nWb
`-9` Wb
zero
90 Wb

Solution :`phi=vecA.vecB`
`=(5.0 xx 10^(-4) HATK. 40 hati-18 hatk) G`
`=-90xx10^(-4)` G
`=-90xx10^(-4) xx 10^(-4)T [ because 1 T=10^4 G]`
`=-900xx10^(-9)` Wb
`THEREFORE phi`=-900 nWb


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