It's ABCD question with answers attached.
Problem is that, I don't think that neither of those are correct. From KVL the equation seems to be i = (E2-E1)/(2r1+2r2 + R). I've attached images of the circuit, answers, and my solution.
Can someone please point me if I am wrong, and if yes, where's...
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...
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 =...
Homework Statement
Homework Equations
Vf+(Vi-Vf)e-t/RC
Tau = RC
The Attempt at a Solution
[/B]
Normally, I would use the eq'n mentioned above to find Vr in an RC circuit. However, this second capacitor is throwing me off. Is there a new equation I should use? How do I think about this...
Homework Statement
Two cells of same emf E and different internal resistance r1 and r2 are connected in series to an external resistance R.The value of R for which the potential difference across the first cell is zero is given by
(A) R=r1/r2
(B)R=r1+r2
(C)R=r1-r2
(D)R=r1r2
Homework Equations...
Homework Statement
I have to write about voltage within a parallel circuit and the formula for voltage in parallel is Vt=V1=V2=V3. But I was wondering if that's only the case if the resistors have the same resistance becasue I used resistors with different values
Homework Equations
V1=V2=V3...
Homework Statement
hello, just came across this type of question for first time.
A voltmeter with a range of 0-30volts is to be used to measure a 120 volt circuit. calculate the value of the resistor to be placed in series with the meter. the sensitivity of the meter is 1000 ohms per volt ...
Hi
Two lightbulbs in series, one with 50W one with 100W which is brighter. I have two different solutions and can't see my error. Using PR=V^2 and I^2=P/V 50/√50R1=100/√100R2 with the same current and R2=2R1. Using PR=V^2 and the same voltage across both bulbs yields 50R1=100R2 or R1=2R2. Which...
Homework Statement
A pair of power transmission lines each have 0.68-Ω resistance and carry 650 Amp. If the primary voltage of the 10:1 step-up transformer is 4.6 kV, calculate the input voltage of the step-down transformer at the other end.
Homework Equations
P=IV
V=IR
IpVp = IsVs
The...
Hello.
Resistive Ohm's law is famously known as V = IR. We can derive its microscopic version as being followed.
V = El, where E and l are, respectively, an electric field and a resistive load length over which a voltage drop V is developed.
I = JS, J and S are a current density and a...
Homework Statement
The circuit of the given problem is attached to this post (jpg file). All info is given in the photo.
Problem: find VA, VB, IA.
Homework Equations
Ohms law
KCL equations
P = VI or V^2/R
The Attempt at a Solution
- First, I noted that VB = 9 - VA.
- next, i set up a KCL...
Homework Statement
I'm trying to find the voltage drop V1 of the following circuit, assuming Vin=1v, and for the life of me can't seem to get the right answer.
Homework Equations
KCL, Ohm's law
The Attempt at a Solution
I basically tried to use KCL at the top node,
Vin/2+2V1 = V1/3 +...
I have a DC powered pump, that has suddenly stopped working.
During troubleshooting I came up with the following results, that I just cannot reconcile:
Input wires, not connected to pump: 12v
Input wires connected to pump: 0v
Sounds like a short in the pump right? However, connecting the...
hello i was wondering about how a dc motor would work as a generator and how the voltage and current would scale with ohms law. for example lets say i had a 350 watt motor thats 36 volts and generates 9.72 amps now lets say i use that motor as a generator but only generate 200 watts how would...
Hi Guys
I'm new the PF and hope I'm posting I the correct place, apologies to admin if not ;-). I'm working on a project at home and maths is not my strong suit. I have an equation that I need to complete and involves converting thermal heat capacity in water into electric power. From what I...
Homework Statement
In the following figure, R1= 3.1 Ω, R2= 4.9 Ω, L1= 0.155 H, L2= 0.2 H and the ideal battery has ε = 5.6 V. Just after switch S is closed, at what rate is the current in inductor 1 changing?
Homework Equations
{ \varepsilon }_{ induced }\quad =\quad L\frac { di }{ dt } \\...
Hey guys, hopefully this is the right subforum..
Anyways, I am wondering how to read the ratings of a relay. Here is what I am looking at:
http://www.ebay.com/itm/5pcs-5V-T73-SRD-5VDC-SL-C-5Pin-10A-Relay-Module-Arduino-ARM-PIC-AVR-DSP-/161755474571?pt=LH_DefaultDomain_0&hash=item25a960aa8b...
Homework Statement
Homework Equations
Current = Voltage / Resistance.
The Attempt at a Solution
I know this requires me using the formula Current = Voltage / Resistance, but I'm confused to which measurements I use. I think possibly I take 0.9 from 5 volts then do 4.1 / 10000?
Homework Statement
http://i.gyazo.com/c6b73ca3a53b7d36bce59a0aa5009d27.png
Homework Equations
Kirchhoff's Current and Voltage Laws, Resistors in parallel and in Series.
The Attempt at a Solution
The main thing confusing me is the diagonal 6 Ohms, not too sure what it is parallel too and how...
Is ohm's law (V=IR) works for both AC and DC. PLz explain in details
Also let me know which formula is right for power calculation for AC and DC circuits. (P=VI or P=VICos)
Does anybody understand the fundamentals of what is happening in this circuit?
Tungsten welding info is all about high current..... but this is a low current scenario.
AC input, CDI Coil generated 20Kv (estimated) suffers voltage drop over 100mm of tungsten rod.
The larger the diameter...