Electrical Engineering Answers

Tasks
1- Give a detailed description of the given script by adding comments. (22 pts)
2- How the noise is modeled in this script. (8 pts)
3- Compare the time domain of the transmitted signal to the noisy signal. (10 pts)
Compare the spectrum (frequency domain) of the original transmitted signal, noisy signal and
the received signal. (10 pts)
Use the function play to hear each signal. (10 pts)
4- Give the type of the used filter. (10 pts)
5- Plot the frequency response using the log scale (10 pts)

What are main factors affecting choice of connections in three phase transformers? Mention
any five.

Two electric furnaces are supplied with 1- phase current at 80V from a three phase,11 KV
system by means of two single-phase Scott connected transformers with similar secondary
windings. When load on one furnace is 0.5 MW (teaser secondary) and on other furnace is 0.8
MW (Main transformer secondary).
What current will flow in each of three phase lines at
i) Unity power factor
ii) 0.5 power factor

A ladder 15ft long rest against a vertical wall. Its top slides down the wall while its bottom moves away along with the level ground at a speed of 2 ft/s . How fast is the angle between the top of the ladder and the wall changing when the angle is π/3 radians.

A plate previously cold worked at 45% is 50mm thick.Its is then cold worked further by 27mm. What is the percentage cold work?

Many electronic appliances and equipment such as computers, televisions and advertising boards requires dc voltages to operate the electronic components and parts in them. Starting with an ac voltage supplied to the homes or offices, a steady dc voltage can be easily obtained by rectifying the ac voltage, filtering to a dc level and regulating the dc output to obtain a desired fixed dc voltage to power these appliances or equipment. Nowadays, integrated circuits have been widely used to obtain regulation. As an electronic engineer, you have been asked to design a regulated dc power supply employing IC voltage regulators based on the engineering principles you have acquired. Your design must provide an adjustable dc voltage output.

Design an arbitrary counter which generates multiples of 3 at the output. But, the output is never greater than 30. Further, two successive outputs are always greater than 5. First, draw state diagram, write all the design steps and draw the final circuit.

Think about a device that needs human input to work—for example, a microwave. Then answer these questions:

What will the device do?
What will make the device do it?
When will the device do it?

Question 6: https://ibb.co/zFF2LL4

Question 4: https://ibb.co/bFB7B1R