Question

Four very long straight wires carry equal electric currents in the + z-direction. They intersect the x-y plane at (x, y) = (– a, 0), (0, a) (a, 0) and (0, – a). The magnetic force exerted on the wire at position (– a, 0) is along–

• A.
  • y-axis
• B. – y-axis
• C. +x-axis
• D. – x-axis

Answer 1

Answer: (C)

+x-axis

Answer 2

Net force is along +x-axis.