Two long straight parallel conductors separated by a distance of $0.5\,m$ carry currents of $5\,A$ and $8\,A$ in the same direction. The force per unit length experienced by each other is
  • A$1.6 \times {10^{ - 5}}\,N$ (attractive)
  • B$1.6 \times {10^{ - 5}}\,N$ (repulsive)
  • C$16 \times {10^{ - 5}}\,N$ (attractive)
  • D$16 \times {10^{ - 5}}\,N$ (repulsive)
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