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Scattering pattern in 3D. Model a spherical PEC scatterer in a 3D Cartesian simulation, using UPML or CPML boundaries and a total-field / scattered-field formulation surrounding the scatterer.
(a) Make the scatterer exactly 1 wavelength in radius. Launch a plane wave from one side of the space at the TF/SF boundary, and measure the scattering pattern in 3D just inside the PML by monitoring a large number of points in 3D. Compare the resulting scattering pattern to the theoretical approximation from the Mie solution (see, for example, Balanis [7] or Stratton [8]).
(b) Modify the scatterer to be either one-half wavelength or two wavelengths in radius; how does the scattering pattern change?
(c) Make the scatterer a dielectric with r = 4 and compare the scattering patterns to those found for the PEC scatterer above.
A 300 kW, 6600 V, 8-pole, 50 Hz, three-phase, Y-connected, non-salient pole (i.e., cylindrical rotor) synchronous motor has the following parameters: Xs = 72 ohm /phase at 50 Hz, R =10 ohm/phase for operation near base speed, and Efo = 3200 V/phase..
The middle C string on a piano is under a tension of 970 N. The period and wavelength of a wave on this string are 3.82 ms and 1.18 m, respectively. Find the linear density of the string.
Supposed that the terminals are labeled a,b. V(ab) = -15 V, how much energy is exchanged when a positive charge of a 4 C moves through the device from a to b. Is the energy delivered or taken from the device.
For the motor in Problem 6-5, what is the slip at the pullout torque? What is the pullout torque of this motor?
Determine the work done in carrying a charge -2x10-6C from P1 = (2, 1, -1) to point P2 = (8, 2, -1) (both in cartesians) in the field E = yax + xay (all in SI units) by integrating QE.dL along the straight line connecting the two points. Note: E i..
Identify the bus types and the unknown variables of the power flow problem. Write the complete set of equations needed to solve the load flow problem.
Determine the resistance of the resistor and express the value both in error form and in percentage error form.
is there any advantage of star connection over delta w.r.t. induction motors? also is there any advantage or
Vary as square root-application, The frequency f of vibration of a wire varies directly as the square root of the tension T of the wire
Estimate the required radius, R, of each plate. The capacitor is set to the maximum 400 pF and is charged to 10 V through a 50 kΩ resistor. Determine the initial value of current flowing.
If R1 = 220 k Ohms , R2 = 56 k Ohms, Rc = 6.8 k Ohms, RE = 2.2 k Ohms, B= 180, rO = 50 k Ohms, C1 = C2 = 10 uF, CE = 100 uF, and Vcc = 20 V, determine the voltage gain AV.
illustrates how the forces can vary in problems of this type. A hiker, who weighs 739 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 3250 N, and rests on two concrete supports
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