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S1: Magnetic flux is vector quantity. \[\] S2: Value of magnetic flux can be positive, negative or zero.

$\begin {array} {1 1} (a)\;\text{S1 and S2 are true; S2 is a correct explanation of S2.}\\ (b)\;\text{S1 and S2 are true; S2 is not a correct explanation of S1.} \\ (c)\;\text{S1 is true; S2 is false} \\ (d)\;\text{S1 is false; S2 is true.} \end {array}$


1 Answer

$ \phi = B . A = BA\: cos\theta$
Since, flux is a dot product of vectors $B$ and $A$, hence flux is a scalar quantity.
If $ \theta$ = acute angle, $\cos\theta$ is positive
and if $ \theta$ obtuse angle,
$ \cos \theta$ is negative
and if $ \theta $= right angle, $ \cos\theta = 0$
Ans : (d)
answered Mar 3, 2014 by thanvigandhi_1

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