Electromagnetic Theory for Quiz #13 | PHYS 4210, Quizzes of Physics

Download Electromagnetic Theory for Quiz #13 | PHYS 4210 and more Quizzes Physics in PDF only on Docsity! Name: PHYS4210 Electromagnetic Theory Quiz 13 April 2009 This is a closed book quiz! Write the best choice in the space next to the question. 1. An oscillating electric quadrupole emits electromagnetic radiation. If r represents the distance from the source, then the magnetic field at large distances falls like A. 1/ √ r B. 1/r C. 1/r3/2 D. 1/r2 E. 1/r3 2. Which of the following is not one of Maxwell’s Equations? A. ∇ · E = 4πρ B. ∇ ·B = 0 C. ∇× E = −(1/c)∂B/∂t D. ∇×B = (1/c)∂E/∂t+ 4πj E. F = qE + (q/c)v×B 3. A beam of light passes from the air into a pool of still water, making a 45◦ angle with the vertical. Assuming that the index of refraction of water is given by n = √√√√1 + 4πe2N m(ω20 − ω2) as we derived in class, which of the following correctly orders the angle which the light beam in the water makes with the vertical? A. red>yellow>blue B. blue>yellow>red C. red>blue>yellow D. yellow>blue>red E. red=yellow=blue