What is the difference between negative charge and free electron?

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Electrons inherently carry a negative charge, making them synonymous with negative charge in discussions about electricity. A charged conductor, such as one with a charge of -1.0 μC, indicates an excess of electrons, specifically around 6.24 trillion electrons. This calculation is derived by dividing the total negative charge by the charge of a single electron. Understanding this relationship clarifies the distinction between negative charge and free electrons. The conversation emphasizes the fundamental nature of electrons in defining electrical charge.
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What is the difference between negative charge and free electron?
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No. I wonder what is the difference between negative charge and free electron?
No.
 
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An electron carries negative charge. It is an electron.

A sheep has mass, but it is a sheep.

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When you see something like "the charge on a conductor is -1.0 μC" this says to you that the conductor is not neutral but has an excess of 6,241,509,074,460 electrons on it (give or take a few). You get that number by dividing the negative charge by the charge of one electron.
 
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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