For items 2 and 3, consider an EM wave in vacuum which has an electric field given by Ē(x,t) = (600 V/m) cos (2 x 107 - I + wt k What is the direction of propagation of the EM wave? A. -Î В. +i C. -K D. +K
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- Assuming moving uniformly in all directions, a source of radio waves uses 15kW to send 2MHz. What is the electric field from these waves be 20km from the source?Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief time. These devices are called pulsed lasers and can be used to ignite nuclear fusion, for example. Consider a pulsed laser that produces an electromagnetic wave with a maximum electric field strength of 1.25×10^11 V/m for a duration of 1.00 ns. What energy does it deliver on a 1.00 mm^2 area? Give your answer in units of kilojoules.4. A circular capacitor of radius R holds a conductive current I. as it begins charging. As the current charges the capacitor, the electric field between the plates begin to increase in strength of E(t) = at³ +c in Newtons per Coulomb. (a) State the expression for Maxwell-Ampere's law. What is the major dif- ference between the Maxwell-Ampere law and Ampere's Law? Show how we arrive to this solution. (b) Determine the magnetic field strength at t = 2 seconds and position from center of cross section of capacitor at r = (1/4)R in terms of µo and eo.
- The wavelength of an EM wave is measured to be 600 m. 1. What is the frequency of the wave? 2. What type of EM wave is it? ditor Suggestions: Showing (Ctrl) MAn electromagnetic wave strikes a 1.56-cm² section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 5.09 x 10-4 T. How long does it take for the wave to deliver 2270 J of energy to the wall? Number i Units Electromagnetic waveAn electromagnetic wave strikes a 1.16-cm² section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.36 × 10-4 T. How long does it take for the wave to deliver 1670 J of energy to the wall? Number i Electromagnetic wave Units
- The E field in an EM wave in free space has a peak of 20.7 mV/m. What is the average rate at which this wave carries energy across unit area per unit time? Express your answer using three significant figures.É=-V ¢ where is the electric potential. One of Maxwell's Equations for EM is VE where p is the charge density. O Combine these two equations to get an expression for the dependence of ø on p.