Electric Current: All Types Explained

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Electric current is defined as the flow of electric charge, which can occur through various mediums. All options presented—negative ions in a liquid, electrons in a vacuum, positive ions in a liquid, electrons in a wire, and ions in a vacuum—are considered forms of electric current. The movement of charged particles, whether they are electrons or ions, constitutes an electric current, typically driven by a potential difference. Thus, all the mentioned scenarios qualify as examples of electric current. Understanding this concept is essential for grasping the fundamentals of electricity.
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Which of the following would be considered a current?

a negative ions flowing in a liquid
b electrons moving in a vacuum
c positive ions flowing in a liquid
d electrons moving in a wire
e ions moving in a vacuum

I presume all of these would be electric currents after reading this definition...

Electric current means, depending on the context, a flow of electric charge (a phenomenon) or the rate of flow of electric charge (a quantity).[1] This flowing electric charge is typically carried by moving electrons, in a conductor such as wire; in an electrolyte, it is instead carried by ions, and, in a plasma, by both.[2]

"flow of electric charge"

I believe a-e are all electric charges.

Please help me confirm this... Thank you in advance for any help you can give.
 
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Current is simply movement of charged particles, usually caused by a potential difference (voltage). All of these are examples of current, despite the charge.
 
All of those answers are would be considered currents. Fact.
 
Thread 'Correct statement about size of wire to produce larger extension'
The answer is (B) but I don't really understand why. Based on formula of Young Modulus: $$x=\frac{FL}{AE}$$ The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A## I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...

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