# HW8 - ECE 134 Introductory Field Theory Fall 2010 Reading...

• Notes
• jayrapkc
• 2
• 100% (3) 3 out of 3 people found this document helpful

This preview shows pages 1–2. Sign up to view the full content.

ECE 134 Introductory Field Theory Fall 2010 Page 1 of 2 Reading Assignment: Cheng: Chapter 7, 8.1-8.5 Cartoon Guide: Chapters 23-24 Homework #8 Due: Monday 29 November 2010 1) It can be shown that the inductance of a length l of coaxial cable with a solid inner conductor of radius a and a thin outer conductor of radius b is approximately 0 1 ln 2 4 b L a μ π = + l Using this result, find the magnetostatic pressure on the outer conductor (force per unit area) under normal operation where the outer conductor is the return path for the current on the center conductor. Is this force attractive or repulsive? 2) Consider the transformer with the secondary terminated in a load resistance L R as shown. This as a real transformer with a coupling coefficient 1 k < . Assuming AC excitation at a frequency ω , derive the frequency-dependent voltage transformation ratio 2 1 ( )/ ( ) V V ω ω in terms of the turns ratio, coupling coefficient, and mutual inductance 1 2 m L k L L = between the primary

This preview has intentionally blurred sections. Sign up to view the full version.

This is the end of the preview. Sign up to access the rest of the document.
• Fall '08
• York
• Magnetic Field, outer conductor, Cheng Do

{[ 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