Two wires,A and B,are parallel to each other and separated by a distance of 25 cm.Both wires carry a current of 1.5 A in the same direction.Where is the magnetic field equal to zero?
A)exactly halfway between the wires
B)outside the wires and 5 cm from A
C)outside the wires and 5 cm from B
D)B and C only are correct.
E)nowhere

Question

Quizplus · Accepted Answer

According to Ampere's Law, the magnetic field around a current-carrying wire forms concentric circles. The magnetic field is strongest near the wire and decreases as we move away from it. The magnetic field due to wire A at a distance of 12.5 cm (halfway between the wires) is equal and opposite to the magnetic field due to wire B at the same distance. Therefore, the net magnetic field is zero at this point.

Two Wires,A and B,are Parallel to Each Other and Separated