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- 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 out and back is called a thermocouple, and can be used to sense temperature Many together is a thermocouple generator Yes, those actually
- How are current and voltage related to torque and speed of a brushless . . .
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") which is equal to the voltage it receives from battery (disregarding power losses and frictions for simplicity)
- What, exactly, is voltage? - Electrical Engineering Stack Exchange
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 rock on your toe, or feel the pressure in a balloon when you blow it up) What voltage is gets abstract (hence the analogies)
- What is forward and reverse voltage when working with diodes?
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 is usually much higher than the forward voltage As with forward voltage, a current will flow if the connected voltage exceeds this value This is called a "breakdown"
- Why are voltage and current inversely proportional to power, but . . .
If power is a constant, then, yes, current and voltage are inversely proportional since power is their product Again, this has nothing to do with Ohm's Law Ohm's law says that voltage and current are proportional because resistance is constant This fact, however, has nothing to do with constant power
- 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 it varies If I add in a resistor to a circuit, the voltage decreases If you have a resistor in a circuit, with a current flowing through it, there will be a voltage dropped across the resistor (as
- 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 with the negative side attached to ground, and the other with the positive side attached to ground This works because voltages are relative
- What exactly happens when you connect two voltage sources in parallel . . .
I have read that when two voltage sources of different magnitudes are connected in parallel (same polarities connected together,) a high current flows from voltage source of high magnitude to sourc
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