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  1. 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 …

  2. 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 …

  3. What, exactly, is voltage? - Electrical Engineering Stack Exchange

    Aug 22, 2020 · We say that voltage is like pressure, or like gravitational potential energy, because we're trying to draw an analogy to something that you can see or feel (because you can drop a …

  4. Volts vs voltage - Electrical Engineering Stack Exchange

    Jul 30, 2015 · As I have understood it voltage is electric potential difference while volts are just electric potential. So I can say that the negative end (ground) of a battery has many volts since …

  5. How much voltage/current is "dangerous"?

    6 It's not the voltage but the current that kills, is a popular yet still incorrect incomplete answer. It is the ENERGY that kills. With static electricity you will will be exposed to voltages much, …

  6. 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 …

  7. theory - Where does U for voltage come from? - Electrical …

    Both of voltage description "U" and "V" are proper, however it must be mentioned that in European notation "U" describes voltage source while "V" describes rather voltage potential. It …

  8. voltage - Can someone explain these battery charge discharge …

    Feb 13, 2023 · Notice how when the battery voltage reaches 2.45 V per cell, the charge current reduces and enters the constant voltage phase of charging (sometimes called the "topping …

  9. 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 …

  10. How much voltage does a green LED need to be supplied? Will it …

    Apr 8, 2017 · The forward voltage rating of your Green LEDs depends on the silicon elements and dopants used, but is likely somewhere from 2.2 to 3.3 V when conducting. This might help you …