What *exactly* is electrical current, voltage, and resistance?
Apr 23, 2019 · The voltage tells us how much specific work (work per charge) is done, or can be done, on other charges when they move between the two locations which have differing potentials. Voltage …
What is the difference between electric potential, potential difference ...
Mar 27, 2019 · Voltage is the difference in potential between two arbitrary points at which the potential is not necessarily zero. For example, the potential at point A relative to a defined reference point …
Why is voltage equal across the resistors connected in parallel?
Jun 8, 2021 · 1 This isn't a physics question, it's a question of definitions. Voltage in a circuit is measured between two nodes. "In parallel," by definition, means that the resistors all are connected …
Why is Power = Voltage $\times$ Current? - Physics Stack Exchange
Apr 25, 2022 · In circuits where the voltage-current product corresponds to power, this is a statement of conservation of power (i.e. power supplied is equal to power consumed), which is reassuring. In …
Why does increasing voltage result in a decrease in current and not ...
May 31, 2020 · I recently read that in order to conduct electricity over vast distances via power lines they had to step up voltage which results in a decrease in current through the medium. This is reflected in ...
Why does more voltage mean more current? - Physics Stack Exchange
Feb 18, 2018 · The voltage (potential difference) corresponds to the pressure difference between two points. A higher pressure in one spot means a larger "push" on the water. For charges in a circuit, …
I don't understand what we really mean by voltage drop
Here we are speaking of voltage in the context of Ohm's law: current/resistance. Of course, in this sense, voltage makes sense at any two points, and since resistance can vary at various points along …
How does increasing voltage or current affect the power?
Power (P) = Voltage (V) * Current (I) That law describes the relationship between power, voltage, and current in a conductor. It means that, if you measure the current flowing in the conductor, and you …
Current without Voltage and Voltage without Current?
Voltage, in the most physical way, is a scalar field that determines the potential energy per unit charge at every point in space. Now, you can't have currents without voltages because if there's a current …
How can there be a voltage when there is no current?
Sep 4, 2014 · Large voltage at zero current! Blasphemy!!! So, if voltage isn't caused by current, what then causes voltage? Simple: electric charge causes voltage, since electric charge is permanently …