There are two coils $A$ and $B$ separated by some distance. If a current of $2 \ A$ flows through $A$,a magnetic flux of $10^{-2} \ Wb$ passes through $B$ (no current through $B$). If no current passes through $A$ and a current of $1 \ A$ passes through $B$,what is the flux through $A$?
- A$5 \times 10^{-3} \ Wb$
- B$2 \times 10^{-3} \ Wb$
- C$10^{-2} \ Wb$
- D$10^{-3} \ Wb$
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