05:46Example - Finding the Amplitude and Wavelength of the Electric Field of an Electromagnetic WaveMelvin Vaughn282views
06:58Example - Determining the Electric Field of an Electromagnetic Wave, Part 1 of 3Melvin Vaughn374views
Multiple ChoiceAt one point in an otherwise empty space, an electromagnetic wave has a magnetic field strength of 2.0μT. What is the speed of this wave?223views
Multiple ChoiceElectromagnetic waves produced by X-ray machines typically have a frequency of approximately 3.5×1016Hz3.5\times10^{16}Hz3.5×1016Hz . What is the wave number of these waves?238views6rank
Multiple ChoiceThe magnetic field of an electromagnetic wave traveling along the z-direction is described by the wave function B(z,t)=1.0×10−3sin(kz−1.27×1012t)B\left(z,t\right)=1.0\times10^{-3}\sin\left(kz-1.27\times10^{12}t\right)B(z,t)=1.0×10−3sin(kz−1.27×1012t), where k is the wave number. Write the complete wave function for the electric field of this wave.322views6rank1comments
Textbook Question(III) (a) When a circular parallel-plate capacitor is being charged as in Example 31–1, show that the Poynting vector →S points radially inward toward the center of the capacitor, parallel to the plates.5views
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