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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 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"
What exactly does common-mode mean in the context of op-amps? Most, or maybe all, topologies could end up outside of common mode voltage ranges at some specific time What is important is to understand under what conditions will you be outside of the common-mode voltage range when designing a circuit, and if so will the op-amp you choose still suffice for your application?
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, much, much higher than 110 230V and that is not dangerous So obviously high voltages are not that dangerous in some cases Why?
Does LED brightness change with voltage? The voltage only needs to be slightly above the forward voltage rating of the LED A common way to control brightness is through pulse width modulation (PWM) Instead of giving a LED less voltage, to dim it, you give it the full voltage, but in repeating bursts The duty cycle determines brightness
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
RMS value calculation of 3 phase line voltages for power calculations For any three-phase load, the total power is sum of the power consumed per phase For a balanced load, this simplifies to: In a wye connected load, line current equals phase current , but line voltage is larger due to two sources, which means: For a Delta connected load, line voltage equals phase voltage Line current comes from two phases, so it is larger This means: This proves the
voltage - Ground vs. Earth vs. common vs. negative terminal . . . 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 double-ended measurements Or in other words, one terminal in a circuit always has many different voltages at the same time, depending on where we place the other meter lead