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Two long straight parallel wires are attracted by a magnetic force $F$.

What will the magnitude of the force be if one current is reduced to one-third its original value while the other current is quadrupled and the distance of separation between the wires is cut in half?

A

$F$

B

$\frac { 3 }{ 8 } F$

C

$\frac { 2 }{ 3 } F$

D

$\frac { 8 }{ 3 } F$

E

$\frac { 16 }{ 3 } F$

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