Amps Definition and 104 Threads

Homework Statement We have a given op-amp, the data sheet has a specified slew-rate value for it, but in practice it happens to be a lot lower. I essentially used a step-input to determine the slew-rate and found it to be much lower. I can't remember the exact values now. I think The...

Hi everyone, I am in a situation where I need to run two 3000RPM, 24V, 15A DC motors from one 24V, 23A switching DC power supply, rated at 600W. Firstly, the power supply has three sets of DC outputs and one set of AC inputs. By sets I mean one positive and one negative. This means I can...

Hello , i would to ask if it is possible for an INVERTING summing amplifier of three input voltages ( V1,V2,V3) to have some of them negative and some positive i.e V1>0 and V2<0 and V3<0 or any other combination. Thank you !

From what I understand about electricity, it would be the amps flowing through your heart not through the circuit of which you touch. If I have a 2 amp circuit on a nine volt battery, it would not kill me because there is only 9 volts. Ohm's law says this will be drastically reduced by the...

Kisielowski Lewandowski Puchta have made a significant advance in calculating the transition amplitudes between quantum states of geometry. They have found a systematic algorithm that enumerates the (generalized) spinfoam-like histories by which one state evolves into another. And in this case...

I am looking for a design to achieve the following. I have an off road camping trailer with a second deep cycle battery installed. The second battery never reaches full charge because of the voltage drop from the alternator in front to the battery in the rear of trailer To charge the second...

Hi, I was hoping someone could help me resolve a little difficulty I have. ------ Question number one: Say you have an op amp with a negative feedback. I've been taught that the principle of 'virtual ground' must hold. But what happens for a circuit for like this? As you can see, I...

What would be the best way to produce 2,000 volts at a low amperage using 12V as the power source? I guess I just want to produce 2000 volts at a low amperage in a mobile environment?

I want to use a 12V DC Brushless permanent magnet motor as a wind powered electrical generator for a project. The motor is rated DC 12V and 1.20 amps. Once I reach an output of 12V does that means that I also have 1.2 Amps? Thank you.

Hi I working on a 2 cell lipo pack and need to drop the volts from 8.4 to under 6 volts. I have been using diode to do this but now I need to know what amps it will handle and which diodes to use. the setup I have now runs one servo that might pull 0.25 amps but now going to a system that will...

hey guys can anyone pls say how much current in amps does a ordinary car battery of 12v generates?? pls...

Homework Statement consider the cascading of two non identical amplifiers stages, each having a low-pass STC frequency response. STage 1 has a low freqency gain of ALF1 and a 3 dB frequency of f1. Stage 2 has a low frequency gain of ALF2 and a 3 dB frequency of f2. Derive a polynomial...

Hi I was starting to read up on Op Amps and near the beginning they said that current flowing into an Op Amp equals current going out (output current + 2 input current + 2 source current = 0) on the basis of KCL. I'm confused because I thought KCL only applied for all currents entering and...

Hi Friends, a high quality submersible water pump from Italy, it is 220 volt, 1,100SA, 4.3 amps, and it is grounded into the Earth while in use; and we also have an emergency electrical cut-off that cuts the power in case of an electrical short; but the question is, in a new high quality pump...

Hi Friends, a high quality submersible water pump from Italy, it is 220 volt, 1,100SA, 4.3 amps, and it is grounded into the Earth while in use; and we also have an emergency electrical cut-off that cuts the power in case of an electrical short; but the question is, in a new high quality pump...

http://www.newscientist.com/article/mg21028174.900-universes-highest-electric-current-found.html A COSMIC jet 2 billion light years away is carrying the highest electric current ever seen: 10^18 amps, equivalent to a trillion bolts of lightning. Philipp Kronberg of the University of Toronto...

Homework Statement Fan Motor Output: 0.172 kW Propeller Fan Compressor Motor Output: 2.9kW DC Inverter-driven Scroll Voltage: 208/230, single phase What I need to find is the FLA for each fan motor(2), and the FLA of the compressor motor. Total MCA = 32A Homework Equations...

Hi guys I really need some help to finish this on time, 1. A circuit with V volts and a 2 ohm resistor and a 2mH inductor and a 500uF capacitor in series. There is a graph of current through circuit over time, starting at 0 current icnreases to 20 amps in 1 mS stays there for 1 ms then goes...

An electron is moving by a wire that is carrying 10 amps of current e-----------------------------> (electrons) 0===============I-->======== (wire) if the electron is moving by the wire at 2.5x10^6 m/s and is .33 m from the wire how do I find these two answers? A) The magnetic field...

Homework Statement Hi! I've to try and solve "use two opamp integrators to solve the differental acceleration of an object falling under the force of gravity d^2y/dt^2 = 10" Homework Equations Vout = -1/Rc * integral (Vin dt) The Attempt at a Solution I'm really stuck as to...

I am trying to design a circuit that has 20 mA acoss an LED, I had been advised I could use a voltage regulator to keep the current at 20 mA. However, I am not exactly sure as to how to set up the circuit. Would I set it up so that it would maintain a voltage and then run that voltage across a...

Homework Statement http://i8.photobucket.com/albums/a45/bahester9/opamps1.jpg Homework Equations I know I can use KCL to solve at a node if I was looking for like a voltage. But I'm not sure really about the current, Ix. The Attempt at a Solution I know that Ix has to somehow be...

As in, what if you have a VERY high voltage? Then I = V/R. But what if you only have a limited number of charge carriers that could eventually run out? Then what will happen to the current? Will it suddenly stop following Ohm's Law? Will it immediately drop off to 0, or gradually drop off to 0?

I have a question about the power usage of a light with a ballast. If the light is rated as a 1000w light and must be run through a ballast. I believe the ballast is like a transformer, because I saw somewhere that the bulb runs at 300 volts. So since Watts = amps x volts, does the wattage...

Hi guys and gals, please forgive the lame-o title, first poster here! I recently picked up a pretty fierce interest in electronics and I've been doing plenty of reading and experimentation but I have a few questions that I'm hoping will land on generous ears. What follows is a "brain dump"...

Homework Statement Please see the attached drawing. Find levels at A and B. Homework Equations voltage gain in dB = 20log(V_out/V_in) dBu defined: 20log(V/0.775V) The Attempt at a Solution First question, since I know the level before the first amp, can I disregard the impedance...

How exactly do guitar amps work and why can't I just plug my guitar into my computer and start playing with the computer speakers instead? I am just curious

Does anyone know what current voltage, amps would be required to produce a corona around an electrical wire? I gather that this would also be dependent upon the wire material and size. I have seen photos of this and would like to do reproduce the process. What type of camera may these...

Okay so here's what I am dealing with. I created a circuit with 3 volts and used a 330 ohm resistor and a simple red LED, and using my multimeter I tested for the current. Now using ohms law: 3/330 = 9 mA... now what I see over the multimeter is 3 mA. I must have calculated something wrong...

Homework Statement Problems below in attached files.Homework Equations http://en.wikipedia.org/wiki/Norton%27s_theorem http://en.wikipedia.org/wiki/Maximum_power_theorem The Attempt at a SolutionQ1) current to voltage amp question Attempt: if i1 is 2mA. Then 5(i1)=.01, therefore using...

http://evcomponents.com/cscart/index.php?dispatch=products.view&product_id=29862 for example I thought Coulombs SI units was A.s so for 1 second 4C = 4A, am i wrong?

hi I've been set a project to test the limitations of the ideal op amp when applied to the real ones, and its doing my head in, if any of you could help me figure this one out i'd be very thankful. the first thing I'm confused about is the input offset voltage: i know its the voltage...

Homework Statement The fastest, most powerful Class III battery charger available is supposed to recharge 8.8 kWh into a Chevy Volt battery pack in 15 minutes. What is the most likely combination of DC volts and amps to do this and why? Homework Equations W=VxI (I = amps) a 120 V unit...

http://img257.imageshack.us/img257/7161/physics.png I only have one more chance at this problem and I can't understand why it isn't 1. I assumed that power in = power out and power = current x voltage. If the voltage remains constant, wouldn't the current as well? "In the circuit shown...

Homework Statement http://rsteiger.is-a-geek.com:81/homework%20question.jpg The question for me is merely conceptual. I'm really good at math (not that a lot would be required here) but I don't even know where to start, hence the lack of an attempt. I'm not looking for the answer (I already...

hi everyone I am new here and no nothing about physics. with that being said, what would you do in order to run over 96V but get no amps or get very little amps...

Alright, I'm working on an idea for a MHD generator, and I have a water based solution. That is Cl- 6250 mg/L or 176 mmol/L SO4^2- 6250 mg/L or 65 mmol/L Na+ 6250 mg/L or 272 mmol/L K+ 6250 mg/L or 160 mmol/L Ca^2+ 5000 mg/L or 125 mmol/L If I'm doing my math right, that means my...

Hi. I joined to ask this one question..but who knows maybe I will stick around and learn other things..lol... I bought an electric 12v anchor winch which is designed to be used with a 12v car battery on a boat. I intend to use it to hoist my bicycles to the ceiling of my garage. However, the...

Homework Statement if its 26.6 milliamps and you want amps is it .026 or .0026? Homework Equations The Attempt at a Solution

What's the difference between volts and amps?

I have a question regarding finding the transfer functions when dealing with op amps. I do not understand the steps towards going from a general op amp circuit towards getting an the transfer function where you can draw the bode plots for magnitude and phase. Could anyone give me a general...

So what produces a solenoid's magnetic field? Voltage or Power? Voltage = Current * Resistance Power = Current^2 * Resistance Magnetic field magnitude of a solenoid = magnetic constant * turns * current We can quadruple the turns using the four times of the same type of wire, but that will...

hello, i know car battery amps range from 40 amps to whatever, i just can't understand them, the amps aren't printed on the batteries and i don't know why? i have a pretty good ideal that my car battery maybe 45 amps, what does this mean? i know the alternator produces 55 amps, if i hooked a...

Homework Statement Will an increase of voltage also increase Amps? The Attempt at a Solution I always hear this water analogy where voltage is equivalent to pressure. If I picture a pipe with some water coming out the end, increasing pressure will result in more water coming out the...

I had electronics last semester, and we went over some digital briefly at the end. I think we learned a bit about digital circuits using diodes and something about transitor-transitor logic? Anyway, at the time I was wondering if there was a way to use Op Amps to create digital circuits.

It seems that amps using vacuum tubes are becoming more and more popular with musicians these days. They're a bit expensive, at least the models I've seen, and the claim is that these vacuum tube amps produce a better sound or a richer sound. I was wondering if there was a physics-based...

AMPS AND DETERMININ DISTANCE, urgent please help Crossed wires (a) Two long current-carrying wires cross at an angle of 37° ("theta" is half of this) as shown in the figure below. The magnitude of the current is the same in each wire, I = 177 A. A wood mouse is running along the dashed...

hi, i'm a little...a lot confused about op amps. in english, can someone tell me their purpose? thanks

Hello! I was reading Asimov on Physics the other day, and found that a watt is a measure of gm cm^2/s^3. That got me thinking, if voltage times current equals watts, what would voltage and current be a measure of? I have been trying to figure it out for a while, and came up with: current=...

volts, current, Amps?? Please could someone explain to me which are affected by which and what they do? I am a bit confused.