Parallel Definition and 1000 Threads

Homework Statement List the order of brightness of each bulb (while the switch is open) assuming the bulbs are all of the same resistance. Homework Equations Ohm's Law: Change in voltage = current divided by resistance The Attempt at a Solution I know that bulbs A,C,D,F are all equal in...

Homework Statement Bulbs in series are less bright than those in a parallel circuit. But are all the bulbs in the series circuit equally dim? Homework EquationsThe Attempt at a Solution I think for the purpose of high school physics bulbs in series are considered to be equally dim in a series...

Hi, My book says that although there is a natural point of rotation, we can however choose any point as a center of rotation. But without explaining further, it goes directly to an example where the endpoint is the center of rotation. I would like to know what the book means by being able to...

Well,I know that the activation energy of a parallel reaction can be determined by the arrhenius equation as (e1k1+e2k2)/(k1+k2) where e1,k1 and e2,k2 are the activation energies and rate constants for the two reacations.now consider the reaction A》B,and A》C since at every instant the reacted...

How can we derive the formula for finding equivalent power in a series and parallel combination of 'n' resistors (with fixed resistance)?

if parallel universe are real... means according to schordinger equation..many possible states..then when we chose anyone state..then other options or i mean possible states would dissolve into one single option whom to chose... or remains present as a reality...?

If two people are in in space ships traveling next to each other at the same speed and they are going close to the speed of light they see each other expiriencing time more slowly. Why does this happen?

The setting strongly require rather unimpressive processors and not high enough demand to create multiple processors. On the other hand there would be clearly a big need for computation power. The solution that I can think of is going simple. In case of devices requiring little computation power...

Homework Statement Find the equivalent resistance between A and B. All resistances shown are in ohm. Homework Equations The formulas for parallel and series connections. The Attempt at a Solution I have attempted to redraw the circuit and my redrawn diagram looks like this. I don't think...

Hi all, Please help. I am stuck with the question below and I have no clue how to solve: Thanks for the help.

Homework Statement The space between 2 perfect conductor plates parallel to the x-z plane separated by a distance 2a are filled with 2 dielectric materials whose surface also lies in the x-z plane, at a distance equal to a from the plates. We're looking for TM modes propagating along the z...

The question is based on the image below but is not the same. The question is as follows: Assume the capacitor is charged, so that there is a charge q on the top plate and a charge -q on the bottom plate. Determine the magnitude of the potential difference across the k2 region, answering in...

Effective resistance in parallel is 1/r1+1/r2+1/r3. However, i don't get why there is lesser resistance when the bulbs are arranged in parallel. I thought arranging a circuit in parallel requires more wire(conductors) , which will increase the resistivity. can someone explain to me please? thank...

This is problem 11.15 of Jackson, Classical Electrodynamics In a certain reference frame a static, uniform, electric field Eo is parallel to the x axis, and a static, uniform, magnetic induction Bo = 2Eo lies in the xy plane, making an angle theta with the axis. Determine the relative velocity...

Hypothetical, Two parallel wires, wire 1 and wire 2. Trying to understand my system. A) Wire 1 has a constant current which is being driven by a V and power supply. Is there a current in wire 2 if the current in Wire 1 is constant? B) Wires A and B both have current flowing through them. Does...

If you place an electron between oppositely charged parallel plates, is it true the the force on it is the same regardless of how far it is from each plate? If so how?

when current flows through 2 parallel wires (same amount of current); the protons in the first wire would see the electrons drifting in a direction and also in the other wire (in the same direction). They would appear to be contracted in the direction which they flow due to length contraction...

Do parallel light rays diverge if ever so slightly upon exiting a spiral wave plate? See image below. Images from...

I understand that the force of gravity prevents galaxies from expanding, as space increases. However, I question if universal expansion separates photons (electromagnetism), as they are traveling along parallel paths (Would the normal distance between them increase over time)? Thank you.

If we suppose universe is infinite than there will be no parallel universes.So I know that If ##Ω_k##→Universe will be infinite.Then there will be no parallel universes cause there's one universe. I am confused.Is that mean the parallel universe idea is wrong ?

Homework Statement There is a DC circuit with a resistor and inductor in parallel. Graph the current through the resistor vs time and the inductor vs. time. Homework Equations i=i(0)e^(-Rt/L)+V/R(1-e^(RT/L) The Attempt at a Solution My first thought was that initially current through the...

Hi everyone. I have a problem with my device. It consists of a parallel plate capacitor with plates made of galvanized iron. Each plate's area is 1mx1inch. It's connected to a bleeder resistor and basically, the circuit is just a simple RC circuit. The source I'm using is a constant 5V DC...

Hi, I would like to know how to calculate capacitance between two wires which are parallel but not necessarily straight.for instance the two wires might be parabolic..I would like to calculate for such general structures.i.e) two parallel wires that are not necessarily straight. Thanks in...

good evening to all if two ideal cells with emf 6 volt and 3 volt are connected in parellel to supply current how the net emf can be decided

Homework Statement If you measure the resistance of the three lightbulbs (independently) and get the following values. What is the equivalent total resistance of the circuit, and it’s uncertainty. R_1 = (50 \pm 7) \Omega, \ \ R_2 = (720 \pm 30) \Omega, \ \ R_3 = 140 \pm 20) \Omega Now you...

Can a line be parallel to itself?

1. So my teacher gave us examples of how to solve capacitor problems. I know how to solve the problem but I don't this problem's particular "formation" of parallel capacitors. In this problem, my teacher says C3 and C4 are parallel but when I did the problem, I assumed it was series. Can anyone...

Homework Statement How are the two lines r = i + 2j + t(i - k), and r = k + s(-i + k) parallel? t,s∈ℝ Homework Equations parametric vector equation of a line r-r_0=tv The Attempt at a Solution Tried to find the conditions for lines to be parallel in ℝ^3.

Homework Statement The ammeter reads 5.0A. Find I1, I2, and ε Homework Equations ΔV=IR The Attempt at a Solution I've never dealt with ammeters before so I'm very confused. To start, I tried breaking this into loops, and then used Kirchhoff's Law. I started with the left side, since I...

Homework Statement Four long straight wires located at the corners of a square of side l = 27.8 cm carry equal currents I0 = 16 A perpendicular to the page as shown in the figure above. Determine the magnitude of B at the center of the square. Homework Equations B=mu0/2pi*I/r The Attempt at...

Homework Statement Note - I have used an image here. For the simple reason I don't want to confuse anyone by missing out subscripts. But if that is not acceptable let me know and I will attempt to write it out. Homework Equations I have considered using Poissons equation - but couldn't...

Homework Statement A load of 1000 kVA at 0.866 p.f. lagging is supplied by two 3 phase transformers of 800 kVA capacity operating in parallel. Ratio of transformation is same : 6600/400 V, delta/ star. If the equivalent impedances referred to secondary are (0.005 + j.015) ohm and (0.012 + j...

Homework Statement Hello, can you help with this problem. For the next circuit, determine the voltages Homework Equations I=V/RT RT=R1+R2+R3+...+Rn P=V^2/R V=V1=V2=V3 I=V/R GT=1/R1+1/R2+1/R3+...+1/Rn The Attempt at a Solution My background is that I only know a very few and I don´t know how to...

Homework Statement Solve the next circuit to find the voltages Homework Equations I=V/R GT=(1/R1)+(1/Rn) V=V1=V2=V3 The Attempt at a Solution My background is that I know that in a parallel circuit, the voltage for each component is the same and electric current it's equal to the sum of the...

Homework Statement The circuit in the link below contains a capacitor of capacitance C, a power supply of emf E, two resistors of resistances R1 and R2, and two switches S1 and S2. After switch S1 has been closed for a long time, switch S2 gets closed at a time t = 0. Sketch graphs of the...

Hello, I am not quite sure how to work out the before and after charging values for resistance and current. This is the circuit I am working with: So, when there is no voltage then the capacitor can be technically not considered as part of the circuit. So for the resistors, would R = 1/R1...

Homework Statement We connect a capacitor C1 = 8 microfarad to a power supply, charge it to a potential difference V = 120V, and disconnect the power supply (Fig. 24.12). http://imgur.com/7VQDEKo Homework EquationsThe Attempt at a Solution How are these capacitors in parallel after S is...

[FONT=Tahoma] [FONT=Tahoma]1. My Conceptual Questions (5) is at 3. CONSIDER: Case 1: two dissimilar slabs of material (say slab 1 and slab 2) connected in series (bonded at their...

There is a series of very interesting science fiction films lately related to physics and from Marvel Universe. To those dizzy already or want to relax from Many Worlds or unsolved problems in physics, etc. Try to watch the latest Avengers: Age of Ultron. I have to watch it the second time to...

Homework Statement 2 different questions that I'm using to test my understanding of the physics concepts rather than the math: 1) How does the brightness of bulb A compare to that of bulb C? After D is added how does the brightness of bulb A change? Does the brightness of B change? Does...

Lets say you have two perfectly reflective parallel mirrors in a frictionless vacuum. You fire off a beam of light between them, so that it bounces between them continuously. Do they continuously accelerate away from each other due to radiation pressure? I think the answer must be no, but I...

Homework Statement Eight lights are connected in parallel to a 110-V source by two long leads of total resistance 1.6 Ω. a. If 302 mA flows through each bulb, what is the resistance of each? b. What percent of the total power is wasted in the leads? Homework Equations V=I P=V^2/R R. The...

Homework Statement Homework Equations F=qE+qv x B The Attempt at a Solution The electric and magnetic fields are parallel, so the magnetic force will be in the j direction and the electrostatic force will be in the k direction. If the magnetic force was acting alone it would be cyclotron...

Quick question about electromagnetic waves traveling through what's basically a capacitor. In the picture I have labelled areas that I'm curious about. 1. Is there a potential induced at A? 2. If yes, is it localized? I suspect the potential would be different at A and B. 3. Is it correct to...

I'm currently teaching a gen ed course called Relativity for Poets. This is the first semester I've taught it, and it's been a ton of fun so far. If anyone is curious, http://www.lightandmatter.com/area3phys120.html is the class's web page with links to the syllabus and lecture notes. The...

Homework Statement Two long, straight, parallel wires carry currents that are directed perpendicular to the page as shown in Figure P30.9. Wire 1 carries a current I1 into the page (in the negative z direction) and passesthrough the x-axis at x a. Wire 2 passes through the x-axis at x 5 22a and...

I've got two resistors in parallel (X and Y) and a variable resistor, ammeter and voltmeter. SEE PHOTO! I've calculated the value of X by measuring V and I when the switch is open. I can close the switch and measure V and I but how do I calculate the resistance of Y? I know 1/x + 1/y = 1/R...

Homework Statement In plane parallel plate the refractive index is a function of coordinate ##z##, so that ##n=n_0 -{n}'z^2## for ##{n}'>0##. The origin of the coordinate system is in the middle of the layer, and ##z## is parallel to the normal of the layer. In paraxial approximation calculate...

Hi fellows. Are batteries connected in parallel better than battery connected in series ? Think of two circuits , with 1 identical bulb each circuit.The first circuit is connected with a battery in series , and the battery in the second circuit will be connected in parallel (2 batteries). Which...

The cell can provide conatant emf ε and initial charge of capacitor is zero. Now current through resistor initially is zero and increases. But the potential difference across the capacitor is always a constant with magnitude ε. then ##\frac{q(t)}{C}=E## So ##q(t)=CE## which implies q is constant...