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 …
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 …
Why did current increase when voltage decreased?
Jan 6, 2024 · At a lower voltage, you need more current to provide the same power. So any device that is designed to provide the same power regardless of voltage will draw more current …
What is "forward" and "reverse" voltage when working with diodes?
Mar 3, 2011 · The reverse voltage is the voltage drop across the diode if the voltage at the cathode is more positive than the voltage at the anode (if you connect + to the cathode). This …
voltage - Help me understand the relationship between positive ...
Some circuits need a negative voltage, so the positive side of a battery would be "ground". Some circuits need positive and negative voltages, in which case there could be two batteries, one …
Why does a resistor reduce voltage if V=IR? [duplicate]
According to Ohm's law, resistance varies directly with voltage You should read this the other way. Voltage varies directly with current. "R" is the constant of proportionality telling how much …
voltage - What is ground and what does it do? - Electrical …
What meaning does the voltage of a floating voltage source have? If I have voltage source with value V between nodes a and b, it means that the voltage difference between a and b will be V …
voltage - "Ground" vs. "Earth" vs. common vs. negative terminal ...
Aug 4, 2014 · Voltage has exactly the same problem: one terminal can only "have a voltage" when compared to another terminal. Voltage acts like distance: voltage and distance are …
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 …
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, …