The Force Per Unit Length Between Two Current-Carrying Wires Is $\mu$

question 61

Multiple Choice

The force per unit length between two current-carrying wires is expressed as
F/l = ( $\mu$ ₀/2 $\pi$ d) I²
Where I is the current, d the separation of the wires, and l the length of each wire. A plot of force per unit length versus I² gives a straight line, the slope of which is

• A) \(\mu\)₀
• B) F/l
• C) (2 \(\pi\)d/\(\mu\)₀)^1/2
• D)\(\mu\)₀/2 \(\pi\)d
• E) FI²/l

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