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A DNG material. Metamaterials are materials made up of periodic structures whose macroscopic behavior can be controlled through the material's design. A double negative (DNG) material is one whose permittivity and permeability both exhibit dispersion, so that at particular frequencies both of these, and thus the index of refraction, can be negative.
(a) Model a slab of Drude material in 2D with dispersive permittivity only per wavelength and make the slab 100 grid cells thick. Launch a sinusoidal wave at the slab with a wavelength of 1 cm ( f = 30 GHz) and observe the wave phase behavior in the slab.
(b) Derive the ADE method for a DNG material. Start with the µ version of equation (10.77) and write an auxiliary equation for the magnetization current M related to H. Then, include M in the update equation for H.
(c) Now, repeat (a) but make the slab a DNG material in 2D whose permittivity and permeability µ both exhibit Drude behavior, both with the same relaxation time and resonant frequency as in part (a). Comment on the results.
Briefly discuss the impact of electron energy, electron current and target on the Bremsstrahlung generated.
A battery has a measured voltage of 12.6 V when the circuit switchis open. The internal resistance of the battery is 0.25 ohms. Thecircuit contains resistors of 6.8, 13.7, and 63 ohms connected in parallel a. Draw the circuit diagram
What are the main limitations that can prevent the achievement of maximum power in the transmission in practice?
Analyse and Model Engineering Situations and Solve Engineering Problems using Laplace Transform
a)What is the voltage across a 220? resistor if the current through it is 5.6 mA b)What is the current through a 6.8? resistor if the voltage drop across it is 24 V c) What is the power delivered by a 6 V battery if the current drain is 750mA
. Calculate the main lattice vectors in reciprocal space of an fcc crystal.
Compute the equilibrium carrier concentrations and the position of the Fermi level with respect to the conduction band edge for a uniformly doped Si region with N_D=1*10^16 cm^-3 and N_A = 1*10^17 cm^-3 at room temperature.
Derive the transfer function for the system. - Find the first three terms of the output sequence in response to the finite input sequence of 2, 2, 1.
An electric stove with four burners and an oven is used in preparing a meal as follows. Burner 1: 20 minutes Burner 2: 40 minutes Burner 3: 15 minutes Burner 4: 45 minutes Oven: 30 minutes If each burner is rated at 1.2 kW
A 150MW alternator generates an open-circut line-t0-line voltage of 12kV at nomial DC excitiation. When the terminals are placed in short-circuit the resulting current per phase is 8000A. a) Calculate the approximate value of the synchronous reacta..
A power supply, when connected to a radio, provides 5V to the radio. When connected to a lamp, it provides 4V to the lamp. Assume the radio can be modeled as 6ohm resistor and the lamp can be modeled as a 0.7ohm resistor.
Design a timing circuit which provides an output signal that stays on for exactly eight clock cycles. A start signal sends the output to the 1 state, and after eight clock cycles the signal returns to the 0 state.
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