# Questions tagged [electric-current]

A measure of the rate at which electric charge is transported (especially through a circuit), it has units of charge/time.

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### Why are charge (or current) and "amount of substance" both still base units even though charge is quantized?

Most unit systems have some dimension where charge or current is treated as a "fundamental" or "base" unit. The SI system is one familiar example. However, since Millikan's oil ...
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### With a properly wired/grounded neutral wire, is it breaking ohm's law?

I have researched and asked some questions around this before, so let me explain. I understand by bonding an Earth ground (literally a green wire to a metal rod in the ground) to the neutral bus bar, ...
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### How are the electrons able to overcome the significant force of attraction of the ions?

The cause of electrical resistance(in a metal) is electrons colliding with themselves and the positive ions. So if the electrons collide with the positive ions, how are they able to overcome the ...
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### What is the definition of direction of current?

Wikipedia defines the direction of current as: The direction of conventional current is arbitrarily defined as the direction in which positive charges flow. But suppose a region where there is a non-...
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### Why is the current equal when the resistors are in series? [duplicate]

I am a High schooler. And I learned that the current is always the same when the resisters are in series. I was told about the water analogy. If the first one had had a smaller resistance wouldn't it ...
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### Potentiometer problem with two cells; determine the length where the jockey should meet the potentiometer wire [closed]

So the statement of the problem is "Find x such that the galvanometer shows zero deflection. Resistance of the potentiometer wire is 6 ohm." The answer to the problem according to the source ...
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### I've been struggling with this question a lot any help would be highly appreciated [closed]

You make a parallel connection between two resistors, resistor A having a very large resistance and resistor B having a very small resistance. The equivalent resistance for this combination will be a) ...
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### What is a cathode and an anode in general sense

i am totally confused and not able to understand the difference between cathode and anode Cathode is defined as reduction point but why is its sign -ve in a terminal and different in a battery Anode ...