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 straight antenna or as a curled antenna: what is EMF in the wire in each case? Ok, so i was thinking about how id answer, i know that if i were to use it as a straight antenna, i'd be causing it to respond to the E, while if i used it curled it would be responding to B. But how could i go about calculating it? An equation i could use is EMF = - B (dA/dt)..but how do i relate it to the electric field in the straight antenna case? Any thoughts greatly appreciated..!