Pick out the expression for force per unit length between two parallel – McqOptions

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1.	Pick out the expression for force per unit length between two parallel carrying conductors if the current passing through both of them are the same?
A.	( frac { mu_o 2I^2}{4 b} )
B.	( frac { mu_o 2I^3}{4 b} )
C.	( frac { mu_o I^2}{4 b} )
D.	( frac { mu_o 4I^2}{4 b} )
Answer» C. ( frac { mu_o I^2}{4 b} )

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