If S=Apparent Power= I²(Z), then how does that = 169.256?

Wouldn't Z = XL + R

Z = 60.319 + 60

Z = 120.319

Then S = I²(Z)

S = 1.410²(120.319)

S = 1.9881(120.319)

S = 239.206 ?

*I'm not getting 169.256 as shown in the textbook and image below. Even when applying pythagorean theory I'm unable to come up with the answer...

Power Factor - Apparent Power Calculations]]>

Conduction angle: SquareRoot( (2 * RippleVoltage) / (Max Output Voltage) )

View attachment 135132]]>

I have an assignment to do I am currently stuck in something. I need to use a BJT transistor BC109 to provide a voltage gain of 80. I have uploaded the requirements in PDF, I did task 1 and 2, I just need help in Task 3. how can I calculate the resistor value and capacitors in order to get a voltage gain of 80. also, can you provide an explanation of how the circuit works? for example, how can I change the frequency and why when changing the frequency the amplification changes.

Thanks]]>

I have what a problem with getting a relay board working with my devices.

Basically I have a powered relay with a +- trigger. I have a NO sensor which needs 6v constant which is powered from the Com on the relay which is powered. When the sensor is activated it closes completing the circuit. Now the hard part is the PCB I have also requires 6v at all times to the reciever.

Is there a way to have them both powered and have the PCB lose power when the sensor completes its...

How to cut power on a relay]]>

I hope I can post this question in this section.

What types of commercial relays/contactors can be used for a 3 phase Motor start/stop safety system.

See image., would M parallel with START be high voltage or low?

What types of relays/contactors could be used for this purpose?

Thanks]]>

Thank you.]]>

https://imgur.com/a/iblZx

I'm trying to find the voltage drop across the dependent current source.

When I apply KVL around the outer loop, I get:

Vdep -10i +10i = 0

This can't be right but I don't see how it's wrong. The current has to be going through the negative terminal of the 10ohm resistor on the top because of the current sources, making the voltage drop negative because it's going from a low to high voltage. This would also make...

Help with basic circuit problem (kvl and kcl)]]>

Any idea how to do this? Need help with the logic diagram and connections on a breadboard.]]>

Given two numbers (one positive and one negative) and using the least number of digits needed (I have to write this number for each conversion) I have to convert these numbers in:

- Absolute value base 2

- Absolute value base 16

- One's complement...

Binary Code conversion - Doubts]]>

Hello, I am a 10th grade student from Parkland High School and I am current taking Principles of Engineering in the PLTW course. For one of my assignments I need to interview a electronics engineer. The interview is a short group of questions and can be in any form (email, thread response, DM etc.) The only thing that is required is their name and website for verification purposes. If any...

Needing interview with electronic engineer]]>

It was written that P=Po(V/Vo)^alpha and Q=Qo(V/Vo)^beta. Later, it was said that if alpha=beta=2 then you get a constant impedance, and also if alpha=beta=1 then you get a constant load. I believe that 'Q' stands for reactive power and 'P' for real power.

I couldn't make any sense that how the two formulas above were reached at and how and why alpha=beta=2 results into a constant impedance and so on. Could you please help? Thank you.]]>

The following circuit is given, and I am supposed to find the current I2 using the Nodal Analysis Method.

I've tried back and forth for a while. I defined x in the upper node, then I defined y in the lower node.The first thing I tried was to put the reference behind the Voltage Source, E. I also defined I1 as the current going through R1 from x to y (not on the figure).

I figured that for x

Ik = I1 + I2...

Using Nodal Voltage Analysis when we have both a current- and a voltage source]]>

But there's a problem because the breakdown voltage is only -0.7V, So I think it's really weird.

Because it's too low for a breakdown voltage. Does anyone know, what is the problem?

View attachment 135160

View attachment 135162

p.s. sorry for my bad English, I only understand what are people saying, But I can't speak or type...

Does anyone know, how to use PSpice]]>

I have searched the internet for how US detectors are used to detect Partial Discharges. I couldn't find anything that explains the working principal.

I'm asking about the working principle of a basic US detector.

So if any one has a link or something like that it would be great.

Thanks.]]>

i(t)=(-Qo/RC)(e^(-t/RC)) during the time interval [t,t+dt] and Qo being the initial charge stored in the capacitor.]]>