20_InstSolManual_PDF_Part15

# 20_InstSolManual_PDF_Part15 - Magnetic Field and Magnetic...

• Notes
• 1

This preview shows page 1. Sign up to view the full content.

20.49. Set Up: For a long, straight wire If the currents are in the same direction, their fields add. If a pair of wires carry current in opposite directions, their fields are in opposite directions and cancel. Solve: (a) (b) The fields of two pairs cancel and the net field is due to the remaining two wires. Reflect: In a typical household appliance cord there are two closely spaced conductors carrying current in opposite directions and the currents in the cord produce very little net magnetic field. 20.50. Set Up: The net magnetic field at each point is the vector sum of the fields due to each wire. For each wire and the direction of is determined by the right-hand rule described in Section 20.7. Let the wire with 12.0 A be wire 1 and the wire with 10.0 A be wire 2. Solve: (a) Point Q : The direction of is out of the page. The direction of is out of the page. Since and are in the same direction, and is directed out of the page. Point P : directed into the page. directed into the page.
This is the end of the preview. Sign up to access the rest of the document.
• Spring '07
• Shoberg
• Current, Force, Magnetic Field, opposite directions, Magnetic Field and Magnetic Forces

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern