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A magnetic field in a certain region is ...

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

A

`-900` nWb

B

`-9` Wb

C

zero

D

90 Wb

Text Solution

Verified by Experts

The correct Answer is:
A
`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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