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 $II$
$(A)$ Two parallel wires with current in the same direction,$P$ is the midpoint.$(p)$ The magnetic fields $(B)$ at $P$ due to the currents in the wires are in the same direction.
$(B)$ Two coaxial circular loops with current in the same direction,$P$ is the midpoint on the axis.$(q)$ The magnetic fields $(B)$ at $P$ due to the currents in the wires are in opposite directions.
$(C)$ Two coplanar circular loops with current in opposite directions,$P$ is the midpoint.$(r)$ There is no magnetic field at $P$.
$(D)$ Two concentric coplanar circular loops with current in the same direction,$P$ is the common center.$(s)$ The wires repel each other.

  • A
    $A \rightarrow (s) \& (r), B \rightarrow (p), C \rightarrow (q) \& (r), D \rightarrow (r)$
  • B
    $A \rightarrow (q) \& (r), B \rightarrow (p), C \rightarrow (q) \& (r), D \rightarrow (q)$
  • C
    $A \rightarrow (s) \& (r), B \rightarrow (s), C \rightarrow (q) \& (r), D \rightarrow (p)$
  • D
    $A \rightarrow (q) \& (r), B \rightarrow (s), C \rightarrow (q) \& (r), D \rightarrow (r)$

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