Magnetic Circuits

Q1: What are concept needed to solve Magnetic circuit problems

Q2: how to draw phasor diagram of the magnetic circuit?

Q7.1    The normalized passband edge angular frequency Wp is - 0.2
   The normalized stopband edge angular frequency Ws is - 0.4
   The desired passband ripple Rp is - 0.5 dB
   The desired stopband ripple Rs is - 40 dB

In Matlab:

Q7.X1 Design a fixed window FIR filter satisfying the specifications in Q7.1. Plot the magnitude and phase responses. Also include magnified plots of passband and stopband showing how well the filter satisfies the design specifications.

EENG 1910: Project I – Introduction to Electrical Engineering Assignment-8

1. Create a MATLAB function that will take as inputs the radius

(r) and height (h) of a cone and calculate its volume. The formula to compute the volume of a cone is as follows.

1

? = 3 ??2ℎ

Write a descriptive comment on the use of the function so that

the user by typing help nameofyourfunction has all the necessary information to use your function.

In each of the following questions (2. & 3.), first, evaluate the given MATLAB code for each of the test cases without using MATLAB. Then, using MATLAB, check the answers you obtained first.

2.

end

3.

switch letter                a. letter = ‘p’ case ‘x’       b. letter = ‘y’ disp(‘Hello’)         c. letter = ‘q’ case{‘y’, ‘Y’}          d. letter = ‘Q’

disp(‘Yes’)           e. letter = ‘x’ case ‘Q’

disp(‘Quit’)

otherwise

disp(‘Error’)

end

Note: When you copy and paste codes into MATLAB, some characters may not correctly translate. As a result, you may have to correct them for the script to run properly.

4. A switch statement can often be used in place of a nested if- else or an if statement with many elseif clauses. Switch statements are used when an expression is tested to see whether it is equal to one of several possible values.

The script pickPizzaCase.m posted on Canvas is written using a case statement. Analyze it and convert it to if-elseif-else statement.

5. Write MATLAB script that will prompt the user for a temperature in degrees Celsius, and then a letter ‘F’ for Fahrenheit or ‘K’ for Kelvin. The script should work weather a capital or small case letter is entered. The script will then print the corresponding temperature in the scale specified by the user. For example, the outputs might look as follows.

>> conversioncode

Please enter a temperature value in Celsius: 45 Do you want K or F? k

The temperature in Kelvin is: 318.15.

Please enter a temperature value in Celsius: 29.3 Do you want K or F? f

The temperature in Fahrenheit is: 84.74.

>> conversioncode

Please enter a temperature value in Celsius: 78 Do you want K or F? K

The temperature in Kelvin is: 351.15.

>> conversioncode

Please enter a temperature value in Celsius: 74 Do you want K or F? P

Please enter F or K!

Note: Lesson-8 has a sample code that could simply be modified. Also, conversioncode is simply the name that I have given to my script. The conversions can be performed using the formulas below.

? = ? + 273.15

? = 9 ? + 32

5

6. Use a for loop to sum the elements in the following vector: V=[10, 27, -66, 43, 72, 87, 56,98, 33, 23.5, 8.5, 77.7, 36, 24,11, 85, 55, 63, 4, 39, 100, -96, 4, 41, 189, -9,78.3, -83]. You will need to first determine the size (length) of the vector. Check your answer using the MATLAB sum function.

7. Repeat the previous problem, this time using a while loop.

8. Create a function called “isInt” to check whether an input number is an integer. The function should display a sentence of the form: “22.5 is not an integer!” or “99 is an integer!” if the inputs were respectively 22.5 and 99.

9. In chemistry, the pH of an aqueous solution is a measure of its acidity. The pH scale ranges from 0 to 14, inclusive. A solution with a pH of 7 is said to be neutral, a solution with a pH greater than 7 is basic, and a solution with a pH less than 7 is acidic. Write a script that will prompt the user for the pH of a solution, and will print whether it is neutral, basic, or acidic. If the user enters an invalid pH, an error message should be printed.

Convolve the following two signals using the INPUT side algorithm.

x[n]= 1, 0, 2, 0, 0, 0, 2, 1, 0, 1

h[n]= 3, 2, 1

y[n]=?

A semiconductor has an intrinsic charge carrier density of 1×10¹⁴cm3 ,a charge carrier lifetime of 10us, an electron diffusion coefficient of 36 cm²/s, and a hole diffusion coefficient of 12cm²/s. It is at a temperature of 450K and is illuminated by a laser beam at an optical generation rate of 10¹⁹ electron‐hole‐pairs/(cm³∙s) What is the separation between the electron and hole quasi‐Fermi levels? Show these quasi‐Fermi levels on a rough sketch of the energy band diagram with the intrinsic, conduction band, and valence band energy levels. What is the change in the semiconductor's conductivity due to the illumination?

Question regarding piezoresistive accelerometers: How do they achieve low cross-axis sensitivity piezoresistive accelerometer?

a) Design and implement a combinational circuit that converts excess-3 to BCD code using 2-input NAND gates. (Design: means show all the steps)

b) Draw the logic diagram of 2x4 decoder using NOR gates only. Include an enable input. (describe in details)

c) Construct a 5-to-32-line decoder with four 3-to-8 decoders with enable and a 2-to-4-line decoder. Use block diagrams for the components. (Describe in details while you are constructing the required circuit)

d) Design a 2-bit multiplier using a set of Multiplexers and 2-input NAND gates (Design: means show all the steps)

Design a synchronous 3-bit binary counter that generates the repeated sequence of 0, 3, 4, 7, 0, 3, 4, 7, 0… The outputs of the flip-flops are to be the binary output signals of your counter. Your solution needs to include the input equations for the flip-flops, and a circuit diagram for each version. a) Design the counter using D flip-flops b) Design the counter using T flip-flops c) Design the counter using JK flip-flops

1. Design and simulate a triangle wave generator with f_o=4 kHz and V_o(pp) = 3V

Explain why the width of a pn junction can be manipulated by an external volatge. Determine the polarity of the external voltage if one wants to increase the width of the pn-junction.

Design and program an Arduino-based circuit that contains the following items
- 1 Arduino Uno microcontroller.
- 1 IR remote control,
- 1 IR sensor
- 1 LCD 16x2 Display
- Any other components you find necessary.
The circuit will do the following:
- The circuit represents a 2-digit calculator.
- At start of operation, the LCD display should display “0” in line 2 of the LCD display.
- Pressing the On/Off button on the IR remote represents the “Clear” button of the calculator, the VOL+ represents the “+” button, the VOL- represents the “-” button, the |<< represents the “X” button, the >>| represents the “/” button, the EQ represents the “=” button, and the digits represent the digits on the calculator.
- The system expects always the following sequence of keys:
[1] Clear,
[2] a digit (representing the 10s of first number),
[3] a digit (representing the ones of first number),
[4] an operation (+, -, X, /),
[5] a digit (representing the 10s of the second number),
[6] a digit (representing the ones of the second number),
[7] Equal
- After a correct sequence of presses is input (total of 7 presses), the display should display something like the following on the two lines of the LCD:
“17+29= ”
“46 ”
- If a wrong sequence of buttons is pressed, for example: “Clear, 9, X, +, …. “, the system should display “ERROR” in the upper line of the LCD.
- You may need to use the “#include <string.h>”

Short lab report about following
Note ** Should has examples **
Note ** Work is done through the Word program **
Lab 1‪ - capacitors
Lab 2‪- indactor
Lab 3‪ - resistor
Lab 4‪- Ohm's law
Lab 5‪ - KVL
Lab 6‪ - KCL
Lab 7‪ - series and parallel circuit