Parallel Definition and 1000 Threads

Homework Statement Calculate the capacitance between A and B in the attached diagram. (Capacitor.png) The Attempt at a Solution I just want to clarify something in my book first: The definition for capacitors in parallel is given as 'the capacitors are directly wired together at one...

Homework Statement I need to be able to determine the equivalent parallel resistance of an RLC parallel circuit, from a measured voltage when the circuit is at resonance. Homework Equations The Attempt at a Solution I know the values of the circuit element, but I'm not sure how...

I really have troubles determining whether a circuit is in series or parallel. Specially when it comes to capacitors, sometimes they draw it horizontally and sometimes vertically and both can occur in one circuit. How for example magically we combine two capacitors drawn like this -l l- and they...

Hello, I was curious, if two resistors are separated by a battery (i.e. a circuit looks like battery -> resistor -> battery -> resistor), are the resistors in series? Similar idea with a capacitor. Also, are the resistors parallel if there is a junction that contains a battery and a...

I am wondering why are voltages the same across a parallel circuit. How can we say that it depends on the start and end points only. On what basis? Thanks for clarifying!

Homework Statement There are 2 parallel plates of unknown area. The area between the 2 plates is completely filled with 150 kg of water. The capacitance is .3 mirofaradays. K of water is 120 and had density of 1000 kg/m^3. Also Eo = 9.1 x 10^-12 C^2/(NxM^2). Determine the distance between...

Ok, you guys! Please note that this is NOT a homework question but merely something that's been bothering me for a while. We have a vertical spring with a hanging mass M. We pull the mass down and let it go, thus creating a harmonic oscillator with the frequency f. What happens with the...

So there is a parallel circuit with two resistors, R1 and R2, and an ammeter that are connected to a constant 30-volt source. The equivalent resistance of the circuit is 6.0-ohms. The resistance of R1 is 10.-ohms. The resistance of R2 is equal to a) 6.0 Ω b) 2.0 Ω c) 15 Ω d) 4.0 Ω...

Hello, I know that if two resistors are in parallel or two capacitors, they have the same voltage. However, is it the case that a resistor and capacitor in parallel also have equal voltage?

From the book, given any two lines non intersecting lines in 3 space, any two planes each contains one of the lines can always make parallel to each other ( the two planes are parallel). The way the book described is that given two lines, you can produce two vectors V1 and V2, each parallel...

Homework Statement I am currently revising some AS level Circuit modules and I'm having trouble seeing how the P.D across 3 components in a parallel circuit can each have the same value as the P.D of the battery. I am probably just being dumb but its just not making sense! such as this...

Hi, in my book there are two capacitor plates distance x apart (they are kept connected to a constant voltage source). These plates are moved apart to distance 3x. In order to find the work done to move the capacitors apart (using W=F dl=QE dl), my book takes the charge Q of one plate and...

in what situations would you require the use of the parallel axis theorem? Also, from the physics book it says that let x and y coordinates of P(a point parallel to the first axis) be a and b. then let dm be a mass element(what does this mean? a point anywhere within the object?) with the...

Homework Statement Consider the circuit shown in the figure below. (R = 31.0 Ω.) (a) Find the current in the 31.0 Ω resistor. (b) Find the potential difference between points a and b. Homework Equations The Attempt at a Solution I am reading the solution of this problem...

Ok so my maths department decided to give us a question about electrical circuits with no information on how they work. Considering that more than half of the students are only starting their physics study this year (including me) it seems a bit odd... I just need a bit of clarification on a few...

the attached file is the question I know the time constant after opening the switch but how can i know the time constant when the switch is on? This is NOT the classic initial and AFTER A LONG LONG LONG Time question How can i know the potential of C in t=2s ? What is the equation...

Homework Statement In the circuit shown, find the current in the 20-ohm resistor and the potential difference between points X and Y. Homework Equations The Attempt at a Solution I've never really ran into a problem where the battery is in the parallel branches with resistors...

Why is it that introducing more loads in a parallel circuit decrease equivalent resistance? While we're on that topic, why is equivalent resistance, a changeable attribute, the resistance of a battery? And why is the voltage and Current in a series circuit the same across all loads, if the...

Homework Statement The parameters of an air-filled parallel plate capacitor are: d = 5mm and A = 500cm2. The charge of the electrodes are Q = 10nC and −Q. Inside of the capacitor in the middle point there is a point charge of 0, 02Q. Find the magnitude of the force acting to the point charge...

Homework Statement Can a circuit be both series and parallel? Not series-parallel, but series *and* parallel? Let's say you have a battery with its positive terminal connected to a resistor and its negative terminal connected to the other end of the resistor. Due to conservation of...

Homework Statement What is the electric field at point A in the unit of σ/ε0? Homework Equations E=σ/2ε The Attempt at a Solution I just want to make sure my thinking behind this is correct. From the center we have +5σ. To find the A what I did is subtract the other two -σ from...

Homework Statement So I have a circuit diagram that looks close to This picture. The first bulb in the series is called A, then inner bulb in the parallel is B and the outer is C The questions a) Which, if any, is brightest? b) What happens if you remove C? Homework Equations...

Scenario: Alice is "sitting" on photon A Bob is "sitting" on photon B both are moving in same direction, their paths are parallel to each other. Per relativity the speed of light is constant So Alice will measure Bob's speed to be c and Bob will measure Alice's speed to be c yet they are...

In a series RC circuit, the current flows until the voltage of the capacitor equals that of the source so that the two voltages oppose each other and there's no net flow. In a parallel circuit, the current indeed does stop flowing through the branch the capacitor is attached to (after the...

http://books.google.com/books?id=p7WsoU-CfPkC&pg=PA224&lpg=PA224&dq=6.132+fluid+mechanics&source=bl&ots=7q6rcCGewf&sig=EvcrqTJCxqLSPbKrkiztkPS4I6Q&hl=en&sa=X&ei=6vo6UYusIenFyAHHt4GYAQ&ved=0CDoQ6AEwAw#v=onepage&q=6.132%20fluid%20mechanics&f=false Can someone please tell me how they arrived at...

With 12V battery,I had simplified the look and found the I.total= 0.47874. I need to find the Current and Voltage in all the resistors. I understand the 11 ohms has I=0.47874 and V=5.28V. Then remaining voltage goes to the parallel ones, so the 12 ohms has V=6.72V and I=0.3061A , then the...

!20V battery.I need to Find Voltage, Resistance and Current in all resistors and total. This is what I did so far. Added 13ohms +15 ohms, then took all 3 of those and made it into one, whihc gave me 7.2258ohms. Did the same for the 72 and 45 to get 27.7 ohms. Then found the total resistance...

I have this question I need to Find Voltage, Resistance and Current in all resistors and total. This is what I did so far. Added 13ohms +15 ohms, then took all 3 of those and made it into one, whihc gave me 7.2258ohms. Did the same for the 72 and 45 to get 27.7 ohms. Then found the...

Homework Statement Sorry for the stupid question, but I want to be sure whether everything is correct. Here is the problem, I think I managed to do all the parts. 2. The attempt at a solution a)ω=2∏f; ω=4000∏ or 12566.37 rads b)Xl = ωL = 4000∏x0.004=50.27Ω c)I1=R x Vac I2=Xl x...

Homework Statement So I just wrote my midterm in physics, and I was curious on how to do the last question. Parallel plates, length 5.5cm, Distance between them is 0.3 cm Electric Field (E) is 5.4x10^4 Asking what is the initial speed of a proton going through the parallel plates if it just...

Homework Statement A parallel plate has p.d. V with one end 0V and the other +V. B-field of strength B has direction along plates. An electron is released from rest at 0V plate. Show that if V is less than e(DB)2/(2m) the electron will not reach the other plate. Homework Equations...

Homework Statement The deck of the boat is parallel to the dock as you jump from the boat and the direction of your velocity as you jump is 30° above the horizontal. If the boat was stationary when you jumped and 1.5 m away from the dock, what is the horizontal speed of the boat (in m/s) after...

Hello, i know how to calculate normal line on point but i don't know how to do this problem. "find an equation of the normal line o the parabola y=x^2-5x+4 tha is parallel to the line x-3y=5."

Can someone check my work for me please? I'm pretty sure i made a mistake with the sign convention but I'm not sure which sources are supposed to be negative. help! Problem: http://imageshack.us/a/img201/339/circuitzz.png My solution: http://imageshack.us/a/img191/8049/circuitz.png...

Homework Statement What is Q(∞), the charge on the capacitor after the switch has been closed for a very long time? a circuit, whose image is attached, has known values for the resistors : R1 = R2 = 72 Ω, R3 = 101 Ω and R4 = 79 Ω, is C = 56 μF, V = 24 V. Homework Equations kirchoff's laws...

hello , I am trying to detect a laser pulse with a photodiode , having a power of 100w max of the laser beam with pulse wave of 1microsecond . when i see the output in ocilloscope the wave do not have 1 microsencond this is without any resistor or capacitor. so my question is that what...

Homework Statement I'm asked to find 1)The capacitance 2)The electric field 3)The surface charge density 4)The polarization charge at the interface between the dielectrics. Of 2 set ups. The first one is a parallel plate capacitor which is half filled with a dielectric ##\varepsilon _1## and...

Hello, I am currently reading about what has been alluded to in the title of this thread. I attached a diagram, as it will be of some help. Okay, in my textbook it says: After the battery is attached to the circuit, the capacitors quickly reach their maximum charge. Let’s call the maximum...

Homework Statement i tried using the usual Q=VC to answer this question for a multiloop RC circuit, "What is Q(∞), the charge on the capacitor after the switch has been closed for a very long time?" and my answer was wrong. clearly, i can't find Qmax because the resistors contribute to the...

Homework Statement A rigid body is made of three identical rods, each with length L = 0.525 m, fastened together in the form of a letter H, as in Figure 10-56 below. The body is free to rotate about a horizontal axis that runs along the length of one of the legs of the H. The body is allowed...

I got the answer by comparing I2R of the circuit with resistor R but why do i have to use R/2 for power of resistor R?( P= (0.5I)^2 (R/2)) I know its parallel to Resistor Q but i want to find the power of that component so shouldn't it be P= (0.5I)^2 (R) instead?

Homework Statement Two parallel plates having charges of equal magnitude but opposite sign are separated by 14.0 cm. Each plate has a surface charge density of 37.0 nC/m2. A proton is released from rest at the positive plate. (a) Determine the magnitude of the electric field between the plates...

Homework Statement The figure shows three capacitors with capacitances C1, C2, and C3. How are they connected: in parallel or in series? |------| |------| |.....| (middle dots don't mean any thing. they help keep lines in place) |---| |---| |---|Homework Equations Serie...

Homework Statement The Attempt at a Solution I know that the E-field is definitely affected by the presence of the space charges. Since one side is positive, the positive charges in the air get pushed towards the negative plate. so Enet = Eplate - Echarges But the thing is...

I have two parallel air coils attached to each other but separated by 3" of air. if I move a magnet past one coil it will induce a magnetic flux into it and that will create a voltage across it. Will that voltage transfer to the other coil thereby creating a magnetic pulse in the second coil...

Hi. Lets say I have two batteries{each one has a 12 volts} connected in parallel circuit with a load of 2 ohms.This means,that each battery will force a current of 6A through the circuit and we will have 12 amperes through the circuit. Is this correct.Does the total amount of amps in the...

Homework Statement Two long, parallel wires carry currents of I1 = 2.78 A and I2 = 4.80 A in the direction indicated in the figure below. (Choose the line running from wire 1 to wire 2 as the positive x-direction and the line running upward as the positive y-direction.) a) Find the magnitude...

Homework Statement A parallel-plate uniform electric field with a strength of 325 N/C is oriented as shown below. An electron (q = 1.6 × 10-19 C, m = 9.11 × 10-31 kg) is released (from rest) inside the field and moves 3.2 cm to the left. What is the final speed of the electron at the end of...

1. Homework Statement The problem is not answering the questions, as supplied by the book The book then asks you to reverse both diodes, so you still have one diode in the circuit that let's current pass through it and one that does not. When you solve for the PD at Q you use the 0.6V...

Homework Statement Two metal plates are placed in parallel, 2mm apart. They are then connected to a fully charged 9V battery. Without discharging the plates, the battery is removed, after which the separation between them is increased to 1 cm. What is the new potential difference between the...