I don't understand why the voltage drops only when the charges in an electric circuitnpass through resistors or electric devices, but don't drop as charges move through the wire. As charges move through the wire due to electric potential differences, from a high potential to a low potential...
Hi all,
I think I know the answer to this question but I'm having trouble explaining why it is so.
If I have a circuit with a fixed resistor connected in parallel with a reverse biased diode, I believe the voltage drop across each will be the same. Is this correct? If so can someone explain the...
Homework Statement
When the internal resistance is large in comparison to the external resistance, the terminal potential difference falls to a small value. This is used to make high voltage supplies safe for use in a laboratory. Explain how this makes the supply safe.
Homework Equations...
Hello Everyone!
So, I need to calculate the voltage in the capacitor, let's call it Vc(t).
For t=0- I know that there is no current in the capacitor. Did some calculations and I've found that Vc(0)=6v.
Now i need to know Vc(infinite)
But when the switch key is opened and the time goes to...
Homework Statement
for S1,S2,S3,S4 are all closed at the long time
find the current in each resistor
Homework EquationsThe Attempt at a Solution
why I3 is not = i2?
the solution of this question is
24-28I1-I212-12=0
7I1-32=3-----(1)
12-12I2-163=0
3I2+43=3 ---(2)
I1+I2-I3=0---(3)
I1=0.492...
Homework Statement
Homework Equations
$$ V=IR $$
The Attempt at a Solution
To simplify the algebra it was suggested that I set $$ R_{1}=R_{2}=R $$ and $$C_{1}=C_{2}=C $$ So that's what I did. I labeled the voltage in the middle node as $$ V_{1} $$Taking KCL at the middle node gives $$...
Hi,
I would like to know how to get the potential difference due to a constant local magnetic field acting on a wire moving at a constant speed perpendicular to the field. What is the link between F = q v ∧ B and the actual difference of potential in the circuit ? How to determine the induced...
I've searched around and all I can find are people quoting the equations. I see it in the math, but it seems contradictory. Here is my line of thought:
1. A source maintains a voltage difference across its terminals.
2. The difference in voltage causes charge to flow from higher to lower...
Homework Statement
Homework Equations
equations listed below in chart
The Attempt at a Solution
here is my answer, i just need to know if I am doing this correctly, thanks :)[/B]
Homework Statement
When a certain 9.0V battery is connected to a voltmeter, the voltmeter reads 8.00V (assume that the voltmeter has an internal resistance of 10MΩ. We may conclude that
(A) only 1/9 of the battery's fuel has been used, and so the battery has plenty of life left in it.
(B) the...
in Voltage Tripler and Quadrupler , why don't current divide between two diodes ( D1 , D3 ) or ( D2 , D4 ) ?
they are forward in the same cycle , right ?
I understand that charging happens in a very little time , so two cycles already is not shown on oscilloscope but in BoyleStad is explained...
Homework Statement
{image inserted in-line by mentor}
http://imgur.com/lnURBGX
Calculate the magnitude of the current through point Y.
Homework Equations
Ohm's Law: V=IR
Kirchoff's Junction: 1/Req=1/R+1/R2+1/R3+...
The Attempt at a Solution
I have been told that in parallel circuits the...
I have a sine wave produced as an output, which varies. This sine wave has been filtered by a moving average filter. From this output, coming out of a DAC module, I need to obtain the the voltage peak-peak value and store it preferably in an array.
How can I do this?
More importantly how can I...
Homework Statement
I'm trying to derive the voltage waveform across the capacitor for a discharging capacitor that has been fully charged by a DC power supply ##v_0##, i.e. ##v_c(t=0)=v_0## and then at ##t=0## the switch is flipped and the capacitor starts to discharge.
Homework Equations
The...
Homework Statement
https://session.masteringphysics.com/problemAsset/1385140/3/36.P42.jpg
Part A
What is the peak current supplied by the emf in the figure?
Part B
What is the peak voltage across the 4.0 μF capacitor?
Homework Equations
I = V/XC = E0/1/2πfC = 2πfCE0
The Attempt at a Solution...
Homework Statement
A 9 V power supply delivers 2 A to a resistive load. The a.c. supply is 230 V, 50 Hz and a bridge rectifier is used in conjunction with a 0.047 farad reservoir capacitor.
Homework Equations
Vpp = 1/(2FCRL) * VC
The Attempt at a Solution
1/(2*50*0.047*2) * 9
=0.957v
after...
If I had a turbine roughly 2 inches in diameter (4-5 blades), where the housing for the blades is about one inch wide (meaning the axle is 1"), what would be the estimated voltage I could produce if I were to use my lung power in one complete exhale through the input? That is, if there were...
5. A wire is formed into a 30 turn loop whose diameter is 14 cm and the resistance of the loop is 4 ohmns. The loop is placed on this page and a magnetic is going directly into the plane of the paper and is varying according to the formula
B(t) = 4t^3 - 9t^2 + 3t - 28
Part (a): What is the...
So, I'm asked to demonstrate the formulas for finding out the voltage labeled here as ΔU, which I'm given in my project document:
I think I would be able to make the demonstrations without any outside help, if only I knew how I'm supposed to interpret this circuit branch in the middle. Is it...
Homework Statement
Homework Equations
The voltage between any two points due to the field from a point charge q is:
Kirchoff's voltage laws, which states that the total voltage around a closed loop must be zero, i.e.:
The Attempt at a Solution
To find V(e<-d) I used Kirchoff's...
My teacher asked me to explain the reason why we need to tune the offset of the function generator of a ttl circuit to 2.5v(or -2.5v::didn't hear it clearly!) to create a shift from -2.5v to 2.5v instead of having it shift between 0v to 5v.
I've done some research regarding the high voltage and...
Homework Statement
So this was the question:
The 60W filament lamp is connected to a 6.0 V battery. The resistance of the lamp in this circuit is 70 Ohms. Explain why this value differs from the value given in (a)(iv) when the lamp is connected to the 230V supply.
My answer was:
V=IR, P=IV...
Homework Statement
Greetings.
Can someone give me hint how to solve following problem:
Homework Equations
From my understanding, you need following formula to solve problem:
and then potential can be obtained by integrating over the current distribution.
But right now these foormuas really...
Hi all
Wondering if anyone can help. Really don't know where to start
I know Zs = Ze + Z1 + Z2
and Z1 = PCR 8.9 milli-ohms/meter
and Z2 = CPC 14.5 milli-ohms/meter
which equates to 0.0234X milli-ohms/meter over X meters
but where does my volt drop come in if I don't know my current?
Regards
Homework Statement
I'm trying to understand the dependence of short circuit current and open circuit voltage on illumination.
Short-circuit current is due to the generation and collection of light-generated carriers -- so does that mean the short circuit current is linearly dependent on...
Homework Statement
FIGURE 2 shows an adjustable voltage regulator using the LT1083
.The LT1083 develops a 1.25V reference voltage between the output and the
adjust terminal. By placing a resistor R1 between these two terminals, a constant
current is caused to flow through R1 and down through...
I've been studying circuits, but I can't find any resources that really answer my specific questions. So far I understand that a battery creates a potential difference between the two terminals, one of which is positive while the other is negative. There is a buildup of positive charge on the...
Hi, i am halfway through one of my assignments and i require some assistance. I do not seek the answer to the assignment just a little boost to my knowledge.
1. Homework Statement
Basically, if i am calculating the Thevenin's voltage and the resistor i have removed that is in question has a...
Hi
I was wondering if someone could help me understand and explain to me how one can control the frequency of the grid from help of the active power (frequency -> power angle -> active power) and how reactive power can be used to control the voltage level.
My thoughts:
Voltage Control:
I don't...
Homework Statement
A circuit is arranged like above.
To make the energy absorbed by the 6 ohm resistor every second is 1.5 J, voltage X should be ... Volt
Homework Equations
V = IRThe Attempt at a Solution
[/B]
I really have no idea.
I just know that it's kinda like wheatstone bridge and...
Homework Statement
Three resistors (R1 = 3 ohm, R2 = 4 ohm, R3 = 5 ohm) is arranged like the picture above.
The voltage at point 1 is 24 Volt and the voltage at point 2 is 10 Volt.
The currents that go in R1 and R2 are 2 Amperes.
The voltage at point 3 is ... Volt
A. 10
B. 12
C. 16
D. 18
E...
In my electrical engineering textbook, in the section with voltage dividers, it says that after you combine two series resistors, then the output voltage can no longer be defined.
It then said that thus the equivalence was made strictly from a voltage source standpoint.
I do not understand why...
Homework Statement
Greetings
So i was trying to solve following prolems:
Homework EquationsThe Attempt at a Solution
I did manage to solve problem 22 using
E = NAB(2pi * f)
E = (100)(0.005)(0.9)(2pi)(50) = 141.372 v
But I have no idea what to do with problem 21. Mostly because I don't know...
Hello,
I have a bit of a problem with my project and it is as follows: I am trying to discharge a capacitor bank (2x 470uf 400V capacitors in parallel). I tried making a MOSFET switch to use that as a switch, but it kept burning out the mosfets (they were rated for 600V and around 100A), then I...
Does electrical arc with the same power but different voltage and current have same temperature?
When electrical arc is form, it is estimate that the temperature is about 3000K
Does temperature depend on voltage or current alone? Or does it depend on power(P=VA)? I think it is power, because...
Homework Statement
Determine the voltage gain Vo/Vi of the op-amp circuit
Homework Equations
inverting amplifer
vout=-(Rf/Rin) x vin
differential amplifer
vout= (R2/R1) x (vo - vin)
The Attempt at a Solution
im really struggling to even get started with this one sorry for the limited...
https://files.slack.com/files-pri/T0GNF95E2-F0TV5JSSG/voltage_reversed_and_shifted.png
This the voltage waveform across a resistor load (15W). The applied voltage is 230V AC at 50Hz. What can be inferred from this? [ the Analog to Digital conversion of Voltage happens at around 1690 Samples per...
Homework Statement
≈
What is a 3D representation of voltage using Kq/r assuming a positive point charge and what is the equation in cartesian and cylindrical form2. Relavent equations
Kq/r
3. Attempt at solution[/B]
I was trying to get a better understanding of Voltage, to really FEEL...
I'd like to find Vth by mesh current analysis.
Mesh A and B share a current source, so they're treated as one supermesh.
What's the equation for this supermesh? Also, do I ignore the loop with the open circuit? Since there's no current flowing there...
2A = ib - ia
Anyway, is this the right...
I need an urgent help. I have a 25 kva transformer in my house. Without load the volt metter indicates 114 volts. Which dould be fine for my house. But when I put the house on the transformer I have no electricity and the volt metter indicates less than 1 volt. Can anybody help me out please?
Homework Statement
[/B]
Three resistors are connected to a real battery. The open circuit voltage of the battery is 4.5 Volts. The voltage across the 5 Ohm resistor is 2.5 Volts.
A) What is the voltage across battery terminals?
B) What is the internal resistance of the battery?
Here's a...
Homework Statement
Consider the circuit shown below. a) What is the total power loss for the whole circuit? b) What is the power loss through R1? c) What is the power loss through R2? d) Find the voltage across each of the three resistors.
I didn't do this myself. I have no idea what's going...
Homework Statement
A real voltage source can be expressed as an ideal voltage source that is in series with a resistor that represents the inner resistance of the voltage source. This voltage source is a EMF and it is also in series with another resistor. Suppose both the EMF resistor...