Mid-Term_Exam_Solutions_Spring2011

Mid-Term_Exam_Solutions_Spring2011 - Mid-Term Exam Graduate...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Mid-Term Exam: Graduate Electromagnetics II, 95.658 Spring 2011, UMass Lowell, Dr. Baird Part I: Multiple Choice (60 Points) Circle the one best answer to each question. 1. What is the wave E = E 0 sin( kx )e - t/τ e -i ωt ? (a) a traveling wave decaying in time (b) a traveling wave packet (c) a standing wave decaying in time (d) a traveling wave decaying in space 2. What does “normal dispersion” describe? 3. Which is not a valid description of a circularly polarized plane wave? 4. What is the phase difference between the magnetic field and the electric field in a radiated wave? 5. When might the electric field and magnetic field in a wave not be perpendicular to k ? (a) in a waveguide (b) in free space (c) they are always perpendicular to k (d) they are never perpendicular to k 6. Where might we find a wave E = E 0 e - αx e -i ωt , (here E 0 does not depend on x or t , but may depend on other things, and α is a non-zero real number)? 7. What happens to traveling waves incident on a plasma above the plasma frequency?
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    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.

    Student Picture

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

  • Left Quote Icon

    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.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    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.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern