Two wires each carrying a steady current I are shown in four configurations in Column I. Some of the resulting effects are described in Column II. Match the statements in Column I with the statements in Column II: Column I Column II (A) Point P is situated midway between the wires. (P) The magnetic field (B) at P due to the currents in the wires are in the same direction. (B) Point P is situated at the midpoint of the line joining the centres of the circular wires, which have same radii. (Q) The magnetic field (B) at P due to the currents in the wires are in opposite directions. (C) Point P is situated at the midpoint of the line joining the centres of the circular wires, which have same radii. (R) There is no magnetic field at P. (D) Point P is situated at the common centre of the wires. (S) The wires repel each other. [JEE Adv 2007 P2]

Question

Examsnet · Accepted Answer

Correct Answer is : (A)→(Q), (R); (B)→(P); (C)→(Q), (R); (D)→(Q)

Column I	Column II
(A) Point P is situated midway between the wires.	(P) The magnetic field (B) at P due to the currents in the wires are in the same direction.
(B) Point P is situated at the midpoint of the line joining the centres of the circular wires, which have same radii.	(Q) The magnetic field (B) at P due to the currents in the wires are in opposite directions.
(C) Point P is situated at the midpoint of the line joining the centres of the circular wires, which have same radii.	(R) There is no magnetic field at P.
(D) Point P is situated at the common centre of the wires.	(S) The wires repel each other.

IIT JEE Advanced 2007 Paper 2