Recent content by vs5813

hmm...should i not assume that? because in the first part of the problem they gave us the emitted power and area so we could find the poynting vector, and from that we can find the numerical value of the rms E and B fields..so i assumed they would stay constant...

Magnetic field due to parallel wires Homework Statement Two very long thin wires carrying equal and opposite currents +/-I are p laced parallel to the x-axis at y=0 and z=+/-a. Find an expression for B field at a point P in the xy-plane (z=0) and show that its maximum gradient occurs for y =...

oh! i just realized...the straight antenna case is actually easier to think about: EMF = integral_from_0_to_l[E*dl] which in this case just means: EMF = El if the two of them are parallel. but the curled antenna...wouldn't the emf just be zero? The B field is not changing, and the area can't...

hmm just a topic for discussion..im revising for an exam and i found an old paper asking to find rms values of electric field and magnetic field from power...and that's easy, using the poynting vector. Then it asks, given a piece of wire of length l in these fields, you can either use it as a...

hmm..i would say..the direction of motion (propagation) of the light wave is the x-direction, while its polarization is at an angle..would that be correct? :rolleyes:

heh :redface: thankyou!

ooh oh, i see..so in this case I could say it is traveling in the x direction, polarized to 45 degrees in the x-y plane :cool: thankyou for the help!

Homework Statement Using Gauss' law, or otherwise, find an expression for electric potential at a distance r from an infinitely long straight line of charge of length h with linear charge density lambda per unit length. Homework Equations q=lambda*h The Attempt at a Solution The...

Homework Statement QUESTION: Consider linearly polarized light of the form: E=|E|cos(kx-wt)(ì+j) where i and j are the standard unit vectors. What is direction of polarization of this lightwave? Homework Equations The Attempt at a Solution this is the first time i tackle a...