Why is it that a carbon nanotube could act as a metal while metallic nanowires that are sufficiently small can behave like a small bandgap semiconductor?

Consider a plane wave with rigth-hand circular polarization travelling in the +y direction in a nonmagnetic lossless dielectric material. The dielectric constant of this material is 4. The frequency of the wave is 100 MHz and the electric field amplitude is 3mV/m. Find the instantaneous expression for E.
I need a clear explanation for this question.

3. A single phase motor load draws 5.5 A of current at a 0.83 power factor lagging from a 50 Hz 240 V source. A capacitor is connected in parallel to the motor to improve the power factor.

(a)If the power factor is improved to unity, find the value of capacitance of the capacitor.

(b)If the power factor improves to 0.96, find the value of capacitance of the capacitor.

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Please use a transformer, bridge full-wave rectifier and filter capacitor to design a power supply circuit that converts 60Hz-110V AC to 12V DC.

Please (1) draw a circuit diagram,

(2) calculate the value of the filter capacitor C so that the ripple at the output current of 2A needs to be less than 0.1V,

(3) select the transformer output voltage and estimate the peak voltage of the DC power supply.

I need assistance with using Verilog to code the following:

The decoder needs attention. Its function is to take the 10‐bit input, and give three 4‐bit signals. The first 4‐bit signal should be the number of hundreds, the second 4‐bit signal should be the number of tens, and the final 4‐bit signal should be the number of units. In Verilog, these can be calculated simply using the numerical operators, specifically: Divide (/)  Modulus(%)

Given:

input[9:0] number

reg[3:0] numb_bcd0, numb_bcd1, numb_bcd2;

       numb_bcd0 = number % 4'd10; //units
       numb_bcd1 = (number / 4'd10) % 4'd10; //tenths
       numb_bcd2 = ... //hundredths

I am having trouble figuring out how to calculate the hundredths place for numb_bcd2; Thanks for the help!

Write a note on Chebyshev multi section matching transformer designs. (b) Design a four-section Chebyshev matching transformer to match a 40ohm line to a 60 ohm load. The maximum permissible SWR over the pass band is 1.2. What is the resulting bandwidth?

An essay about researchers experiences in designing DC power supply circuit and audio amplifier circuit to preform a speaker?

Consider the cylindrical wire of radius R= 5mm having current density through
a cross section varies with radial distance ‘r’ as J= (3x 109 A/m4 ) r2 , and ‘r’ is
in meters. What is the current through the outer portion of the wire between
radial distances r=0.75R and r=R.

for the unity feedback system, the open loop transfer functions is
G(s)=K(s+2)(s+3) / (((s^2)+2*s+2)(s+4)(s+5)(s+6))
a. sketch the root locus (detail step wise)
b. find the jw-axis crossing and the gain. K, at the crossing

Design a 4-to-16-line decoder by using the minimum number of 2-to-4-line decoders. The 2-
to-4-line decoders have an enable input (‘1’=enabled) and the designed 4-to-16-line decoder
does not have an enable. Name the inputs A0...A3 and the outputs D0...D15.

A DC shunt motor is designed without compensating windings. If there is no compensating winding then the effect of armature reaction will exist. What effect does armature reaction have on the torque-speed characteristic of a shunt DC motor? Explain mathematically in detail. What can be done to remove this problem completely?

1, Sketch a second order LC filter, determine the transfer function and the cut-off frequency

2, Explain the 6 classification of filters

Re-submission of question. Consider the full-bridge Single-phase inverter with input voltage equal to 200V. This inverter is controlled by Sinusoidal PWM technique with amplitude modulation index equal to 0.5 to generate a 3-level half-wave symmetry with frequency equal to 50Hz. (a) Draw its power circuit [solved by an expert] (b) Obtain its switching table [solved by an expert] (c) Calculate the width of each generated pulses at the output [solved by an expert] (d) Calculate the RMS value of output voltage [solved by an expert.] (e) Calculate the amplitude of fundamental frequency ( Not solved ) (f) Draw the waveform reference and carrier signals [Not solved ] (g) Obtain the waveform of output voltage [Not solved ] (h) Design the trigger signals of switches [Not solved ].Hoping to have the remaining answers.Thank you.

Draw the equivalent circuit of a transmission line and hence write the transmission line equations for an elemental section of a transmission line.