The magnetic induction in air at a point $1\,cm $ away from a long wire that carries a current of $1\,A$, will be
  • A$1 \times {10^{ - 5}}\,T$
  • B$2 \times {10^{ - 5}}\,T$
  • C$3 \times {10^{ - 5}}\,T$
  • D$4 \times {10^{ - 5}}\,T$
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