Question

Does current affect the resistance of a metal wire?

Answer 1

Step-by-step explanation:

Yes, current does affect the resistance of a metal wire. When an electric current flows through a wire, the moving electrons experience resistance, which is the opposition to the flow of electric charge. The resistance of a wire depends on various factors, such as its length, cross-sectional area, and the material it is made of.

When the current increases, more electrons move through the wire, leading to a higher collision frequency with the wire's atoms, which increases resistance. Conversely, when the current decreases, there are fewer collisions, resulting in lower resistance. Therefore, the resistance of a metal wire is influenced by the amount of current flowing through it.

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Answer 2

Yes, it does because, according to Ohm's law, the resistance of a conductor is directly proportional to the current passing through it, and inversely proportional to the cross-sectional area of the wire (R=V/I).

So, when the current through a wire increases, its resistance also increases ( 'cause the current causes more collisions between electrons and atoms in the wire, which increases the resistance); conversely, when the current through a wire decreases, its resistance also decreases.