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

question 61

Multiple Choice

The force per unit length between two current-carrying wires is expressed as F/L = µ₀/2πd) 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) µ_{0 .}
• B) F/l.
• C) .
• D) .
• E) FI²/l.

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