Questions tagged [ac]
AC stands for Alternating Current. It usually applies to voltages with >100 V RMS, but can also be used for other AC voltages, like 24 V industrial AC power.
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Rewiring motor and want to understand what I am getting into
This is a power feeder with a barrel switch. I want to know what all the wires are and understand how to wire when I replace the switch you see. Switch as well as case are broken and the exact ...
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Integration of AC-DC Power Module on PCB
I will preface saying that this is my first time posting here so please forgive any obvious mistake I could make.
I am in the process of designing a PCB for a simple terrarium control system. Mainly, ...
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Why the V_BE is too high in this circuit?
I am simulating the below circuit in LTSpice and I was measuring the waveform of V_BE of the transistor (I am using 2SC5200) in transient mode.
Regarding the circuit, I am using a N-MOSFET to drive ...
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Power supply reactive power sign convection
Suppose I have a circuit like this:
And I want to find the real and reactive power needed from the supply.
So let Z = 10 + 10j ohms
Apparent power S = V^2/Z = 5 - 5j VA
Therefore real power needed is ...
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Why the voltage drops in this rectifier circuit?
I try to measure rectification of mains power supply using diode bridge using 1N4007. In order to measure safely, I used the circuit given below. When measured using DMM , the input shows 226VAC (...
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Use small generator to mimic power from a CR2032 battery [closed]
I wish to manually turn a small electric motor to use it as a generator. I wish to use this generator to power a radio transmitter that is normally powered by a CR2032 coin cell battery. When I ...
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Find voltages and current in polar form
I would like to check whether I got my answer right or not. Here's my attempt at the problem:
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AC Circuit Analysis
I have the circuit that looks like the following:
It is supposed to represent the fundamental of a SCR full-wave bridge rectifier powering a water pump. I am interested in finding the current through ...
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Car audio amplifier AC ground
In a car audio amplifier I noticed that there is a DC ground as well as AC ground. Why is it that the AC ground is taken from the torroidal transformer, is it not that the AC ground reference voltage ...
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How can I connect a single phase device to a three phase outlet? [closed]
My device (a SCARA robot) is rated for 200-240 VAC and is single phase. It comes with a power cable with 3 wires (1 green ground wire and 2 black wires).
I have access to a 250 VAC three phase outlet ...
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How can current flow in an AC-inductor circuit if the source voltage is always exactly countered by the inductor's back-EMF?
I'm referring to a circuit consisting of an inductor and an AC power source. I found this post here asking the same question, but I wasn't satisfied with the answer; even though the back-EMF is ...
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Why is there no RMS voltage on a resistor in the Proteus?
I use the VSINE element for generating AC voltage:
Next, I transform the voltage using the TRAN-2P3S and power the R3, but I haven't RMS (root mean square) voltage up on it according to the Ohm's law ...
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AC: Compare change of current/power inverter feeds into grid with change of current/power measured at grid side
I'm living in Europe, connected to the grid: 50Hz, 230V and my apartment is connected via only one phase.
Let's assume my apartment has a constant demand of 500W - which does not change.
There is a ...
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Is there a "correct" connection polarity for wattmeters in AC circuit?
In the book "Fundamentals of Electric Circuits" by Alexander and Sadiku, the three and two wattmeter methods are described as:
You can see that the wattmeters in two wattmeter method are ...
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Alternatives to "resistive loads"?
In this question I asked whether it is correct to say that the reason why the nominal voltage in alternating current is the root-mean-square voltage is so that the
$$\text{watts} = \text{volts}\times\...
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