$A, B$ and $C$ are parallel conductors of equal length carrying currents $I, I$ and $2I$ respectively. Distance between $A$ and $B$ is $x$. Distance between $B$ and $C$ is also $x$. ${F_1}$ is the force exerted by $B$ on $A$ and $F_2$ is the force exerted by $B$ on $A$ choose the correct answer
  • A${F_1} = 2{F_2}$
  • B${F_2} = 2{F_1}$
  • C${F_1} = {F_2}$
  • D${F_1} = - {F_2}$
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