Two Long, Parallel Wires Are Attracted to Each Other by a Force

question 32

Multiple Choice

Two long, parallel wires are attracted to each other by a force per unit length of 160 ìN/m when they are separated by a vertical distance of 0.50 m. The current in the upper wire is 20.0 A to the right. Where on the line in the plane of the two wires does the total magnetic field equal zero?

• A)0.1 m below the upper wire
• B)0.2 m below the upper wire
• C)halfway between the wires
• D)0.3 m below the upper wire

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Definitions:

Years

Units of time equal to 365 days (or 366 days in leap years), used as a basic measure of time for planning and agreements.

Risk Premium

The additional return expected for holding a risky investment over a risk-free one.

Long Bonds

Bonds with a long duration, typically more than ten years, that are subject to higher interest rate risks but potentially offer higher yields.

Period

A length of time during which a series of events or an action takes place or is completed.