Let B(P) and B(Q) be the magnetic field ...

Let `B_(P)` and `B_(Q)` be the magnetic field produced by the wire P and Q which are placed symmetrically in a rectangular loop ABCD as shown in figure. Current in wire P is I directed inward and in Q is 2I directed outwards.

If `int_(A)^(B)vecB_(Q).vecdl=wmu_(0) "tesla meter",int_(D)^(B)vecB_(P).vecdl=-2mu_(0)` tesla meter
`&` `int_(A)^(B)vecB_(P)vecdl=-mu_(0)` tesla meter
the value of 1 will be:

10A

None of these

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