I've been given this question for my TMA2, I've tried looking at the learning material but it gives no information on how to calculate the gap? Does anyone have a formula for this? Or can someone point me in the right direction?
Thanks
Hello, I need to find the magnetomotive force (mmf) of an inductor using NI (turns multiplied by amperes). The set up is pretty simple, AC power supply set at 24 VAC goes through a full wave rectifier (4 diodes) and into an inductor. If the inductor has a resistance of 47 Ohms, it looks like...
Here is the actual question.
And here is my attempt at a solution
In Summary I did the following
Found the Equivalence Resistance to Be 5.9 ohms and the Current throughout the entire resistor to be 1.53 Amperes
Worked backwards from my resistor simplifications. When the resistors were in...
Hello! I am confused in a question I found on youtube. I have uploaded the screen shots.
He told that with respect to S and R we have to write the change from Q to Q+( next state). But I am not getting it. How he wrote Q+ states?Is he considering that when S=1 , we have to set the circuit i.e on...
Given that they're all on the same branch, I had assumed that they were in series with one another. But with the middle resistor having being on the middle of three branches, it looks parallel.
Like I said, I have a feeling it's in series (making the answer 3R).
This question is from a past...
Hello guys! I am getting confused in drawing the circuit for a priority encoder. Because I saw some youtube videos and also on google , they all are drawing 4 to 2 priority encoder differently.These both are 4 to 2 priority encoders.
I attempted to solve the problem by following the positive terminal of the battery and I realized that Resistor R1 has a different path than R2+R3+R4. I came to the conclusion that R1 is in parallel with R2+R3+R4. The series connection with R2,R3,R4 would be 30 ohm total by adding the three...
1. Homework Statement
Moderators note: link removed. All images should be uploaded to PhysicsForums.
2. Homework Equations
V=IR
Series in parallel
Series in current
3. The Attempt at a Solution
I managed to get the current and voltage of R1 and R2. I've been trying to get the next one...
I built a wien bridge oscillator. But how do I tell if it works? I am very new to building circuits. I recently
Starting making circuits on a breadboard. I have not taken any
Electronics class. I am trying to learn how to do this.
1. Homework Statement
Find the Thevenin equivalent at terminals a-b
V1 = 70V
V2 (dependent) = 4Vo
R1 = 10Kohm
R2 = 20Kohm
2. Homework Equations
##V=RI##
##1/req = 1/r1 + 1/r2 + ... +1/rn##
3. The Attempt at a Solution
Found the current i = 1mA by KVL using Vo = 10ki then did source...
1. Homework Statement
The following circuit is given, and all voltage, current, resistance and power must be found for each resistor.
I have found the following information:
Vsrc = ?
Isrc = .5A
Rsrc = ?
Psrc = ?
V1 = ?
I1 = .5A
R1 = ?
P1 = ?
V2 = 2.5V
I2 = .25A
R2 = 10
P2 = .625W
V3 =...
1. Homework Statement
I'm asked to find the thevenin equivalent circuit, the load being ##R_1##
##e(t)=E_0\cos{(\omega t)}##
##R_1=1k\Omega \ R_2=R_3=1k\Omega##
##C=220nF \ f = 250Hz \ E_0=10V##
2. Homework Equations
3. The Attempt at a Solution
##Z_{th} = Z_{R_2}//(Z_c+Z_{R_3}) =...
How is symmetry used to solve electrical circuits? I have seen several problems in books in which currents in two resistors are said to be equal due to 'symmetry'. That is a concept that I fail to understand and thus cannot apply. In class, we were shown a few circuit diagrams which were...
Hello,
We just finished up midterms and I actually did well--got an A. However, somehow between the midterm (class before last) and last class we jumped to creating a circuit with a diode. I am pretty lost.
1. Homework Statement
2. Homework Equations
Voltage / Current = Resistance
3...
1. Homework Statement
Question:
For the circuits shown in Fig. 6, voltage meters and ampere meters are used to measure
the voltage across the load and their current flow. If the Red Probe is plugged into the “+”
terminal of the voltage meter and ampere meter, which circuit(s) show both the...
1. Homework Statement
10 v, 100 hz goes into a circuit of a 1o resistor, a 1o inductive reactance and a 1o capacitive reactance that are in series.
What is the current. What is the V across the cap.
2. Homework Equations and the attempt at a solution
So I know I = V/Z and Z = sqrt( R^2...
I have to construct suitable circuits to show the operational principles of some sensors: pH meter, sound, light and temperature. Would these count as circuits? or diagrams? (I'd say diagrams).
I am finding it hard to find circuits showing how sound sensors and pH sensors work etc and the ones...
Hey guys, I have tried and tried to find a start to this problem with no success. My book may have the answer but unfortunately I must be not realizing it. So hopefully I just need a different perspective. Typically I would find the equivalent resistance of the circuit and then begin to...
1. Homework Statement
why is there a loss of energy in DC circuits and power loss is reduced in AC when transmitted
2. Homework Equations
3. The Attempt at a Solution
Loss of energy in a DC circuit is due to the resistance of the wire cauing the wire to heat up therefore energy is being...
1. Homework Statement
I have to explain the equation W=VIt and apply it to a circuit. But I do not undertsand what the equation shows.
2. Homework Equations
W=VIt
3. The Attempt at a Solution
My rough guess is : work done is equal to the time (t) taken for 1A of current to flow at 1V
1. Homework Statement
https://imgur.com/3H3pCkD
R is the resistance of each resistor, determine total resistance in the circuit. (see the image in the link above)
2. Homework Equations
R=1/R₁+1/R₂+1/R₃+... (in parralel circuit)
R=R₁+R₂+R₃... (in series circuit)
3. The Attempt at a...
1. Homework Statement
http://www.chegg.com/homework-help/questions-and-answers/ideal-opamp-find-v0-terms-vs-need-help-solving-vp-firstly-understanding-parts-q8278769
2. Homework Equations
I am having difficulties with this problem. It asks to find vo in terms of vs. For the gain, I got an...
1. Homework Statement
Assume that the two balanced loads are supplied by an 840-V rms 60-Hz line. Load #1: Y-connected with 30+j40 Ω per phase, Load #2: balanced three-phase motor drawing 48 kW at a power factor of 0.8 lagging. Assuming abc sequence, calculate the complex power absorbed by the...
1. Homework Statement
Suppose a 120 micro-farad capacitor from a camera flash unit retains voltage of 210 V when an unwary student removes it from the camera. If the student accidentally touches the two terminals with his hands, and if the resistance of his body between his hands is 1.8...
1. Homework Statement
a. What is the net resistance in the circuit?
b. What is the current through the 4 Ω resistor?
c. What is the voltage drop across the 3 Ω resistor?
2. Homework Equations
R12 = R1 +R2
R34 =R3 + R4
1/Rt = 1/R12 + 1/R34
I3=I4
3. The Attempt at a Solution
a) R12...
Hi all,
I think this issue periodically resurfaces in PF. I have found a similar discussion in this closed post and possibly others. I'm posting this because I'd like to check my understanding, if anyone is available to provide some furtherinsight.
So I'm trying to gather a "overall"...
1. Homework Statement
http://www.chegg.com/homework-help/questions-and-answers/interconnection-fig-p25-valid-find-total-power-developed-circuit-interconnection-valid-exp-q22345911
It asks if the circuit is valid, which I assume it is.
It asks for the power developed
2. Homework Equations
I...
1. Homework Statement
An automobile battery has a terminal voltage of 12.8 V with no load. When the starting motor (which draws 90A) is running, the terminal voltage drops to 11.0 V. What is the internal resistance of the battery?
2. Homework Equations
V= EMF- Ir
3. The Attempt at a Solution...
I previously made a derivation of Neumann potential. It can be found in the pdf file below. I originally made it in the ##dx## method. It involved equations like ##dm=I dS##. My maths teacher told that such an expression has no meaning, at least in elementary calculus. However I argued that my...
1. Homework Statement
1. For the first measurement, a load resistance Rload = 119Ohms results in an output voltage V(OUT) = 11Volts. For the second measurement, Rload = 11Ohms results in an output voltage V(OUT) = 3.2Volts. From these two measurements, determine the output voltage V(OUT) when...