In figure, points \( A \) and \( B \) are connected by a perfectly conducting wire. Calculate th...

In figure, points \( A \) and \( B \) are connected by a perfectly conducting wire. Calculate the current through \( A B \)
(1) \( 2 \mathrm{~A} \)
(2) \( 1 \mathrm{~A} \)
(3) \( 1.5 \mathrm{~A} \)