Current in square wire configuration · CAP 2019 #11
Physics · electromagnetism
Problem
As in the following figure, four wires are passing through the page at the corners of a square. Wires at A and C both carry current I flowing into the page. Currents at B and D are flowing out of the page. If the net force on the wire at B is zero, what current is flowing out of the page at D?
[Figure: Square with corners labeled A, B, C, D]
a) 2I
b) 2I
c) 2I
d) I
e) Not enough information