Question

Current is flowing through the circular loop. then the imaginary magnetic poles are produced at:

• A. Top and bottom of the loop
• B. Right and left of the loop
• C. Both side the plane of loop
• D. Each and every part of the loop

Answer 1

Answer: (C)

Both side the plane of loop

Answer is C.
Electric current in a circular loop creates a magnetic field which is more concentrated in the center of the loop than outside the loop. Concentric circles are formed, which are centered at the point on both sides of the loop as shown in figure. The lines near the center of the loop are almost straight. The magnetic field at the center of the loop is perpendicular to the plane of the loop. The concentric circles become larger as we move away from the wire because as the distance increases from the current carrying conductor the strength of the magnetic field fades away.
Let us consider a circular loop of wire lying in the plane of the table. If the current pass through the loop clockwise, then the Right hand thumb rule can be used to determine the direction of the magnetic field inside and outside the loop. The direction of the magnetic field is perpendicularly downward on the plane of the table inside the loop and outwardly outside the loop. The upper side of the plane is the north pole and the lower side is the south pole.