Two identical, long wires carry equal amounts of currents in the same direction. When their separation is d, the force per length 21 - between them is F. If the separation distance is reduced by 10%,...

Extracted text: Two identical, long wires carry equal amounts of currents in the same direction. When their separation is d, the force per length 21 - between them is F. If the separation distance is reduced by 10%, what will be the force per length? O A) 10F/9 O B) 10F C) F O D) 9F/10 E) F/10