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The measure of how difficult it is for electrons to flow through a circuit is called resistance.

Another Answer

Resistance is not a measure of 'how difficult' it is for electrons to flow through a circuit. It is more accurate to describe it as a measure of whether a material can supportcurrent flow.

For example, it's incorrect to say that an insulator 'blocks' current flow. It's more accurate to say that it has an insufficient amount of charge carriers to support an electric current.

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Your question is its own answer.


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