Consider the following discrete-time system: y[n] = 100 x[n] cos(0.45πn + 0.5π)

(a) Determine if the system is linear, time-invariant, causal and stable. Justify your answers.

(b) Find the impulse response h[n] for the system and sketch the waveform.

(c) Draw the system block diagram using adder, multiplier and delay elements.

Solar cell A uses a semiconductor with a band gap of 1.1 eV. Solar cell B uses a semiconductor with a band gap of 2.0 eV. Either cell is thick enough to absorb all the light above its band gap energy. Both cells can work together simultaneously with one on top of the other to operate more efficiently in a small space. But which cell has to be on top (first to receive sunlight) for both to work simultaneously and why? Also, in relation to the solar energy spectrum, which cell has the more optimal band gap for photovoltaic applications if only a single cell can be used (say for cost reasons)?

10. You are at 76° west longitude, 37° north latitude, and observe the sun to rise at 05:10:20 hours local clock time. Your friend is at 87° west longitude and 49° north latitude. What will be your clock time when she sees the sun rise?

Two reservoirs R 1 and R2, the level of each of which is controlled by a detector of
high level (a for R1, b for R2) and a low level detector (c for R1, d for R2). When these sensors detect the presence of the liquid they are at level 1.
 
There are three LEDs V1, V2, V3, which operate under the following conditions:
V1 = 1 if both tanks are full.
V2 = 1 if both tanks are empty.
V3 = 1 in all other cases (tank half full or full one empty ...).
 
A number of combinations are technologically impossible, the outputs V1, V2,
V3, will take in these cases an indifferent value (X).
 
1. Establish the truth table of this system.
2. Determine simplified logic equations using Karnaugh's tables.
3. Give the V1, V2, V3 circuits with doors.

1. Make a way to calculate the energy of 5000gr of coal Calorific Value 475 k cal / kg into electrical energy with the combustion requirements and the conversion factor by yourself.

A balanced 3-phase load of 30MW at 132kV, 50Hz and 0.8P.F

lagging is delivered by means of a 100km transmission line.

The series impedance of a single conductor is (20+j25)ohms

and the total phases to neutral admittance is 0.00000316

Siemen. Using the nominal ? method, determine

(a) the ABCD constants of the line.

(b) The receiving end current

• (c) the sending end voltage

• (d) the sending end current

• (e) the sending-end power

• (f) the receiving-end power

• (g) The efficiency of the line

• (h) The voltage regulation of the line

• (i) Sending end p.fAs

Create a VHDL code of a 4 bit Counter using D flip flop and a Frequency Divider that provides the clock signal input for counter

3. The lecture notes show a 4-bit by 4-bit multiplier. If the same approach is used to make an 8-bit by 8-bit multiplier:

a) How many AND gates are required?

b) If each AND gate has 1 ns of delay and each adder has 5 ns of delay, what is the total delay for the 8-bit by 8-bit multiplier?

c) Can you think of a better way to array the adders to reduce the delay?

(MATLAB)

Write a script that would create a 3x5 matrix of random integers and write this new matrix to a file called “Assignment3_Question5.dat”.

Speaker systems are typically rated by a resistance value (referred to as characteristic impedance), what resistance is this amplifier designed for?

What is the power delivered to the speakers in Watts?

Please explain!!!!!

A balanced three-phase generator delivers 6.3 kW to a delta-connected load with impedance 13 - j23.4 Ω per phase. The magnitude of the line current I_Lis:

A generator whose reference voltage is 1 [_0 ° pu, feeds a load of 150 Mwatts and 50 Mvars through a lossless line whose reactance is j 0.15 in pu based on 100 MVA.- Find the value of the voltage in the load (magnitude and angle) for the first iteration using the Newton Raphson method assuming an initial stress of 1.0 [_0 °

In CASCADE control, some systems will request that you select one of three different equations.

a) Explain what is meant by EQUATION A, how it is represented graphically, and where it can be utilized.

b) Explain what is meant by EQUATION B, how it is represented graphically, and where it can be utilized.

c) Explain what is meant by EQUATION C, how it is represented graphically, and where it can be utilized.

A stable system has four zeros and four poles given by zeros: z = ± 1, ±j and poles: z = ± 0.9, ±j0.9.

It is also known that the frequency response function H(e^jω) evaluated at ω=π/4 is equal to 1, i.e., H(e^jπ/4)=1

a. Determine the transfer function H(z), and indicate the region of convergence.

b. Determine the difference equation representation.