2012年9月3日 · 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).

2017年4月9日 · When I output a constant audio signal, the voltage rises initially to 0.5 V, but drops back to 2 mV after 2-3 seconds. What purpose does this 2 mV bias voltage serve?

2024年12月28日 · How to find the power delivered to each bulb of the 50 bulbs given in a circuit. Given that the bulbs are rated (240V, 240W), connected in parallel to light a long corridor. The copper wires have

2017年8月30日 · I am designing a PCB and there will be high voltages. What is the recommended clearance that I should have between two traces that have a voltage difference of 1000VDC and 2000VDC? Additionally, is there an equation that I could use …

What voltage range can I expect to see on the audio lines from the iPhone? I assume that turning the volume up on the phone will produce a large AC voltage, but how large does it go up to? I want to make sure that it wont exceed the voltage level that an Arduino can read on its input pins.

Voltage is technically electomotive force in the particular units of Volts. Since Volts is so overwhelmingly used, we usually get lazy and say "Voltage" even when we don't really care about the units and should say "electromotive force", sometimes abbreviated EMF. EMF is like "distance", wheras voltage is like "inch measurement".

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 means that U = V1 - V1 (voltage is a difference between voltage potentials). I agree that in IEEE and American standards voltage is described by "V" letter.

While reading a datasheet for an IC I came across the pin voltages being presented as 3V3 or 1V8. What does this representation stand for?

2012年7月17日 · So rated voltage is 12V. After charging, i.e. when the charging device says that it is finished, I measure 14.3V. When I now discharge, at what voltage should I consider my battery as "empty"? Is this the lowest voltage that I can discharge it …

2015年3月12日 · These additional connection allow to go for higher current without having massive voltage drop at the connection. Coupled with higher voltage, that gives a lot higher charging power. All in all, I guess that the laptops will as …