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 $II$ and indicate your answer by darkening appropriate bubbles in the $4 \times 4$ matrix given in the $ORS$.
| Column $I$ | Column $II$ |
| $(A)$ Point $P$ is situated midway between the wires. $Image$ | $(p)$ The magnetic fields $(B)$ at $P$ due to the currents in the wires are in the same direction. |
| $(B)$ Point $P$ is situated at the mid-point of the line joining the centers of the circular wires, which have same radii. $Image$ | $(q)$ The magnetic fields $(B)$ at $P$ due to the currents in the wires are in opposite directions. |
| $(C)$ Point $P$ is situated at the mid-point of the line joining the centers of the circular wires, which have same radii. $Image$ | $(r)$ There is no magnetic field at $P$. |
| $(D)$ Point $P$ is situated at the common center of the wires. $Image$ | $(s)$ The wires repel each other. |
IIT 2007, Advanced
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