Two Parallel Long Wires Carry the Same Current and Repel

question 22

Multiple Choice

Two parallel long wires carry the same current and repel each other with a force F per unit length.If both these currents are doubled and the wire separation tripled, the force per unit length becomes:

• A)2F/9
• B)4F/9
• C)2F/3
• D)4F/3
• E)6F

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Definitions:

Logarithm

A logarithm is the power to which a number, called the base, must be raised to produce a given number.

Fraction

A numerical quantity that is not whole, representing a part of a whole.

Inverse Function

A function that reverses the effects of another function, such that the composition of the two functions yields the identity function.

Graph

A visual representation of data or mathematical functions on a coordinate plane.