A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation.
Circuit breakers are made in varying sizes, from small devices that protect low-current circuits or individual household appliance, up to large switchgear designed to protect high voltage circuits feeding an entire city. The generic function of a circuit breaker, or fuse, as an automatic means of removing power from a faulty system is often abbreviated as OCPD (Over Current Protection Device).
What do i need to do for transfer characteristics for the first problem (B)?
I plotted the ##V_1## and ##V_2## plot on the same graph:
Is it correct?
For the second problem , i guess the capacitor ##C_1## is just there to ensure AC flow .
But really unsure how to approach this .
How does the current flow in this circuit and what is its actual true path, regardless of any directions in the figure?
What does the “5i” above the dependent source mean, and does the current flow according to the dependent source or the independent source?
Are the two resistors 2 ohms and 6...
Dear all, hope you are doing great. I am designing a circuit using EasyEDA simulation tool. But I am facing a problem after connecting the relay to the single-Chip IC (STM32 103RTC6). The low voltage is showing around 2V, whereas it was originally supposed to be 0 volts. I am still unable to...
I understand that removing bulb E will cause the equivalent resistor to change in the circuit. This change will cause the current across the circuit to change (which will either brighten or dim the bulbs).
I found that R_eq (with E) is 1.167.
R_eq = [1 + (1/1+1)]^-1 + [1 + 1]^-1 = 1.167
I...
The picture of the question and my try:
Would it be possible for someone to double-check my answer for accuracy? I would greatly appreciate any feedback or guidance on this matter.
^^ as mentioned in the homework statement, the relevant equation is my worked out impedance for the circuit. I have attached a diagram of the circuit below.
I read the solution which stated that ADB and ACB branch are symmetrical. Therefore D and C are equipotential. However this feels like a circular argument when im saying that the branches ADB and ACB are symmetrical, im imagining this circuit without the DC branch. And then im using my previous...
Theres a picture of the circuit attached.
I did not understand how to start the problem since we dont know the distance between the terminal A and the sphere to write the absolute potential at terminal A. So I looked at the solution and im afraid I dont understand it at all.
The teacher took...
I understand that the current in the top wire above A will be the same as the wire just below A, as it will be for the wire region marked by n to m, due to the fact that all current in equals all current out.
My confusion lies in the first equation I supplied, the change in voltage through the...
I am going to reason this out for a simple circuit with a battery (with no internal resistance) and connecting wires which can be considered perfect conductors. Please let me know if I am thinking correctly, I am quite confused by the overall working.
An isolated battery has two electrodes...
Can someone provide me with a justification on this? As fair as I know current through an area is the rate of transfer of charge from one side of an area to the other.
So how does current become 0 in a conductor (not connected to a circuit just a plain conductor) just cause "the number of...
Assume i want to create a magnetic circuit within a ferrite core with airgap (i need the B field in airgap). The ferite core would have a coil on it. Problem is if i want my core airgap area and magnetic path length longer than wavelenght of current through the coil i would have high losses as...
I had a question in my mind about PCBs.
Printed Circuit Board (PCB) is a non-conductive material with conductive lines printed or etched. Electronic components are mounted on the board and the traces connect the components together to form a working circuit or assembly.
Now a Pencil has...
TL;DR Summary: Hey, I was hoping for some help on how I would be able to calculate the minimum and maximum frequency that can reached with the potentiometer and also how this circuit works intuitively, because I don't really understand it. Thanks in advance!
Hey,
The TL;DR sums it up. I don't...
my textbook said this
which I don't think is true, tho the textbook still said this (this equation is the true one)
so is the textbook right about the first equation?
Consider the problem below
I used Kirchoff's loop/junction rules to correctly arrive at answer C (1.3A). Before using Kirchoff's rules I tried to get ##V_3## by treating this as a Fermi problem using the following lines of logic, but there is a flaw somewhere, can someone identify the flaw...
I'm just not able to grasp the concept of a LC circuit intuitively, and yet I have found zero answers to my doubts.
I can't understand why does the current keeps flowing counter-clockwise between the 3rd and the 4th circuit (see image attached)
I know that when the capacitor has 0 charge, in...
Hi, I recently acquired some of these cheap modules for plasma experiments. I tried dissolving the epoxy off of one of them in an attempt to reverse engineer the circuit. I can see a resistor, diode, and transformer but am unsure about some of the other components. I was wondering if anyone here...
Hi! I tried by using the Thevenin. Later using Vth and Rth to calculate Vs(0.1ms).
After that I divided the voltage from E over R1 and R3.
The circuit and my attempt:
TL;DR Summary: I am trying to design a circuit using juat a power source, 3 switches (1,2,3) and 3 Resistors (a,b,c) and wires. i want to design the circuit so it satisfies 4 conditions. the first being if all switches are on, the 3 resistors have current flowing in parallel, second, if only...
I had two trains of thought. One is that the capacitor will fully charge when t = infinity, so when you plug t = infinity into the equation of charge as a function of time you get 1.68E-4, which you also could've gotten from Q = CΔV where ΔV = 42V. My other train of thought was that when t =...
Amplifier gain ##A_V## is defined as the ratio of an amplifier's output voltage to its input voltage,
i.e. ##\displaystyle\frac{V_R}{V}=\frac{IR}{IZ}=\frac{R}{R}=0.5## at 200 Hz.
But this is absurd. Where have I gone wrong? Please nudge me in the right direction.
As far as I can tell there are three circuit states that control the recliner foot rest, raise it, lower it, and off. How is this wired, how does the switch function etc...? I assume the up and down switch flip the polarity across the motor, but that is all I can seem to reason out...
Hi, I'm teaching Engineering (honors) and want to drill the students on series, parallel resistors in circuits and voltage dividers. does anybody a have a worksheet with lots of samples?
Thanks!
So far this is what I have:
I have the power source, two triple in a battery case, negative to the T emitter, T output to the (-) of motor, T base through a resistor to the switch, switch to the (+) of motor.
I tried wiring the Led to this junction and the switch, but either the motor or the...
Hi all,
I was trying to detect small optical signal through amplification process and realized that there is a huge DC background behind the AC signal. So I decided to remove the background using a Thorlabs DC blocker (EF500). The photodiode I used was Newport 818-bb-21, and the signal before...
I separated the circuit into parts- upper and lower
For the upper loop I wrote: -14-2I1-3.4I3-I2 = 0
For the lower loop I wrote 16-2.9I2+3.4I3-5.4I2 = 0
I solved for I1 and I2 separately and plugged it into the junction rule and solved for I3.
I may have got it wrong because of the...
This is the given circuit:
I think to add another Cnot on the right with a1 as control and a0 as target, to set initial states of a0 an a1 both |0⟩, and to measure the a0. If a0=|0⟩ then b0=b1, and vice versa.
Is it correct?
I tried splitting it up into 4 individual resistors, adding them up (each side serially and then both sides with each other as parallel) and then using V=IR but it ended up being the same current as the original.
(The answer should end up being (9/8)* the original current)
so this is a question i am trying to solve and then confirm with the simulation,
so far i have..
Lamp load
IL = PL/VL 1/6 = 0.1667A
Thevenin resistance Rth = Rs1 || Rs 2 = 2 x 4 / 2 +4 = 1.333ohms
Vth = 12V
look at node voltage with load circuit and use kcl
V = 6V
Is1 = 12 -6 / 2 = 3A
Is2 =...
The answer key is (D) but I don't understand how to approach this question.
I am guessing the wire is acting as short circuit path but how to know which bulb will be short - circuited?
Thanks
My answer is C (although I am not sure if the correct one is C or D). I suppose since the 1-V battery is being charged by the 9-V battery, the electrical energy should be on the RHS of the energy transformation. Am I correct?
Thanks
In the circuit, two identical incandescent lamps are connected to a voltage source of voltage U = 6.0 V via an ohmic resistor of magnitude
R= 8.2 are connected to a voltage source of voltage U = 6.0 V.
As electrical components, incandescent lamps do not behave like ohmic resistors. When current...
I have a circuit board, and one of these inrush current limiting devices (yellow arrows) has failed. Does anyone recognize them? Failing that, does anyone recognize the logo that looks like a letter V and an upside down V superimposed? I have searched in several places, but have been unable...
I want to ask about question (c). My idea is to compare the period and time constant. The period is 0.05 s and time constant is 0.005 s.
Time constant is the time needed for capacitor to discharge until the charge stored in it becomes 37% of initial charge. But I don't know how to relate the...
I simulated the below circuit to capture the phase delay between input voltage and output current in LTSpice
How do i measure the phase delay introduced due to capacitor?
Is the PN junction inside a diode what makes the electrical current only flow in one direction and not in the opposite direction? If this is so, why does it happen?
Also
Why is the P-type material said to have empty holes and the N-type material to have free electrons?
Hi,
I am not sure if I have calculated the task correctly
I have now assumed that the capacitor does not need to be charged and is therefore fully charged. In a DC circuit, a capacitor acts like an infinitely large resistor or like an open switch, so I assumed that it is a parallel circuit...
So I have calculated Zab which is 3-3j (it's correct).
Now I have to calculate (Uab)0. This is where I just get completely lost.
In my opinion:
(Uab)0=E3+I3*R3+Ic1*Xc1+E4
Note: I recognize these currents are not shown in the picture, but based on their indexes and basic logic I hope you...
Hello,
Please help me to create the sampling processing circuit.
i have to create the voltage and current sampling processing circuit, Then the output of circuit will be fed to processor to further operation.
output voltage of my original circuit will be maximum 250v and current is 30A(peak...
use a frequency range from 10 Hz to 10 kHz and show that the circuit operates as a high-pass filter with a ‘knee’ point at 1 kHz
I have to be honest i an not 100% on what the question is asking me,
should i be working out Frequency resonance first using all the information provided, then i need...
Does anyone know a cheap(available on Ebay/AliExpress ) battery protection circuit board that has undervoltage/overvoltage protection and charging capability? I have a 3.7v Li-po battery and I need to draw 5 Amps from it.
In the given circuit, a transient current will flow and when this current finally stops at equilibrium, the charges ##q_1## and ##q_2## are assumed to deposit at the capacitor plates as shown below. The dashed line indicates an isolated system that will have it's total charge conserved.
If I...