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A long straight wire carries an electric current of $2\,A$. The magnetic induction at a perpendicular distance of $5\,m$ from the wire is
  • A$4 \times {10^{ - 8}}\,T$
  • B$8 \times {10^{ - 8}}\,T$
  • C$12 \times {10^{ - 8}}\,T$
  • D$16 \times {10^{ - 8}}\,T$
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