
What exactly is voltage? - Electrical Engineering Stack Exchange
The total voltage you get from one out and back, even with a high temperature difference is pretty small. By putting many of these out and back combinations together, you can get a useful voltage. A single …
What, exactly, is voltage? - Electrical Engineering Stack Exchange
Aug 22, 2020 · And also if voltage is like gravitational potential energy, how does more voltage mean more current? And here our nice analogy breaks down. In this sense voltage is more like pressure in …
How are current and voltage related to torque and speed of a …
Sep 3, 2012 · Voltage instead "regulates" how fast a motor can run: the maximum speed a motor can reach is the speed at which the motor generates a voltage (named "Counter-electromotive force") …
Voltage drop across a single resistor and across two resistors
Jul 20, 2020 · An intuitive way to look at is that all the voltage is dropped across two resistors, and since the resistors are the same, the voltage drop across each will be the same, each taking half.
Why does voltage drop across resistance contradict Ohm's law?
Aug 10, 2020 · Here when current flows in this circuit, due to ohm's some voltage has to be dropped across the internal resistance r, causing the output voltage, i.e, the voltage available at cell terminals …
How to reduce DC voltage using resistors?
Jul 10, 2013 · How would one go about using a 12 V DC power source to power something which needs 4.5 V DC using resistors? Is there a way to determine how much adding a resistor would drop the …
voltage - Can someone explain these battery charge discharge charts ...
Feb 13, 2023 · I have these charts from Renogy 12V Deep Cycle AGM Battery 100AH datasheet. Can somebody explain to me In the first chart: what does the F.V/Time column present? In the second …
How does an ideal op amp amplify a voltage input when the voltage ...
Nov 1, 2019 · You only stated one of the two critical facts about an ideal op amp. The voltage difference between the inputs is zero, and the input currents are also zero. Therefore, you can apply Kirchhoff's …
voltage - How many amperes can an alkaline AA battery supply ...
Jun 15, 2021 · I've seen a Duracell alkaline AA battery on Amazon. It can supply 1.5 V, but I don't see any information about the current (in A) or the power (in W). Where can I find this information?
How to choose value of resistor in voltage divider?
Mar 29, 2012 · 71 I understand that the output voltage is determined by the ratio between the two resistor values, and that if the both resistors are same then output voltage will be exactly same for …