# homework

1. ### Need help on a logic circuit - logisim (or any simulator)

Hello everyone, I'm new here. So I've got this assignment that asks me to use JK flip-flops in order to create a circuit that obeys the following truth-table: The thing is, I have no idea on how to get these results at all. From what I understand, first two lines imply that PRE and CLR are both...
2. ### Question about voltage input output

So i have this simple circuit.While my voltage input is 5V why is my output 3.3V? Can someone explain this to me.Thanks in advance!
3. ### Problem with transistor

Hello, in the following image you can see a circuit with a npn transistor. I marked the given values with red and the unknown with blue. Below the circuit you can see my calculations and solutions. I'm stuck at finding I1. I would be very thankful for some guidance.
4. ### Finding the closed loop gain expression

Hi! thanks in advance for the help. I'm trying to solve this exercice for school but a really can't seem to get it right. I get really confused when that VDD apperas and can't identify the feedback mesh Here is what i think it is: But then again i'm not sure if that vdd or that resistor...
5. ### Exercises with voltage and power

Can you tell me if my result results are correct, and if there are errors where are they? I used the symbol rms to indicate the root-mean-square, Avo is open-circuit voltage gain, Ap is the power gain, Rl is the load resistance. i stands for input, s for source and o per output. > 1) A sensor...
6. ### Duty Cycle Calculation

I am trying to solve a numerical where the Speed of a DC motor operating at 15V was measured to be 2000 rad/sec. Now a PWM signal is applied to the same motor to get a speed of 400 rad/sec. If the voltage amplitude of the PWM signal is 5V, then what should be the value of duty cycle? I know the...
7. ### Homework Help Power Electronics

1) Enter your expression for the dc component of the output voltage V: 2) For the buck with input filter, enter your expression for the dc component of the L2 inductor current I2: 3)For the buck with input filter, enter your expression for the dc component of the capacitor C1 voltage VC1...
8. ### Circuit Analysis

For Question 2.1, is the power 500W or 100W ? Do we need to apply the passive sign convention rule for power in whatever cases? Also, i’ve Learnt that we can check answers by balancing power in a circuit. But the power in this kind of circuits don’t balance out, but it is still valid. So when...
9. ### I really can't find a solution for this, need to find how many Ohms is the resistor

Okay so I have a project due tomorrow and I can't get it right, I need to find how many Ohms is the resistor Rb, the link is a screenshot to the task UBX is Uin. https://prnt.sc/t92gbh
10. ### RC circuit/Laplace transform/homework problem

Hello i have a question about a RC circuit. Can i represent with Laplace Transform the discharging of RC curcuit and how i get the transfer funtion to represent the free responce of the system
11. ### LTSpice simulation of a two-port network.

Here's the question : "For the two port network given, obtain the Z-parameters, ABCD (transmission) parameters and h (hybrid) parameters. What should be the value of load resistance connected at Port-2 for maximum power transfer when a voltage source of 25V is connected at Port-1." (Picture...
12. ### Does the Bombardier/DHC Q400 Auxiliary Power Unit Include a DC Generator? If it does, what kind of winding does it use?

Good day! I am currently writing a short report on DC machines and I intended to use the generator onboard the Bombardier/DHC Dash 8 Q400's Auxiliary Power Unit as a focal topic. Upon searching through several documentation (both from Bombardier themselves and some airlines like AirBaltic) I...
13. ### Need guidance on this homework problem

I have a problem in my ET212 class that I truly have no idea on where to start, I have the circuit design, but am clueless when it comes to the values that I need to use. I am not asking for answers, mainly just guidance on where I am supposed to start, or the steps i need to do to find my...
14. ### Finding an unknown resistance

Hello. This may be a simple problem, but I'm struggling to obtain the resistance R found in the figure below. First what's throwing my are the two voltage sources. I'm used to seeing these present in op-amps, but the way they intersect is throwing me. I'm not sure how to determine their...
15. ### How do you solve the following dependent circuit problem? I tried to use KVL to get i1, but I got .44, which is the wrong answer.

Circuit problem: I have the answers to it, but I need to know the process of how to get there.
16. ### Calculation of power factor in a RLC-circuit

Hello, I got a homework exercise about the calculation of the power factor in a RL-circuit and in a RLC-circuit. The question consists of 3 sub questions, I have managed to calculate the first 2 however I am struggling with the third one. For the calculation of the third question, the other 2...
17. ### AC circuit: Find the current through the inductor

Hello, Trying to solve this and using LT-spice for confirmation I can't verify my solution. Where could be wrong ? Here is my try: Thanks
18. ### 2 Answers for circuit analysis question, both seem right.

The question is asking what the resistance of the first resistor is (which has been labelled as 0 ohms on the diagram). I am told 20v drops across the first resistor and i am given the value of the other resistor. Now both of the methods I am sure I've done correctly but I'm getting different...
19. ### Logism Circuit Design Help. HEX Display

I need to design a circuit to calculate the product of two 4-bit binary numbers, and then display the decimal result in three HEX displays.I already have the multiplication part, but the hex baffles me since : 1-The inputs are two 4-bit binary numbers. 2-The system can display each input...
20. ### Finding voltage source on circuit

Hello, I've been having difficulty dealting with circuit analysis. Here, for example, I'm given the task to find the voltage on Vs. But I fail short half-way through. Also, I don't understand how to deal with negative voltages and/or currents, and would appreciate help! My attempt at solving...