Resistivity is a measure of how strongly a material opposes the flow of electric current. It depends on the material's intrinsic properties, such as its composition and temperature.
Think of resistivity like the thickness of a pipe. Just as a thicker pipe makes it harder for water to flow through, materials with higher resistivity make it more difficult for electric current to pass through them.
Resistance: Resistance is the measure of how much an object or material impedes the flow of electric current. It depends on both resistivity and the physical dimensions (length and cross-sectional area) of the object.
Conductivity: Conductivity is the opposite of resistivity. It measures how easily a material allows electric current to pass through it. Materials with high conductivity have low resistivity.
Ohm's Law: Ohm's Law states that there is a linear relationship between voltage, current, and resistance in an electrical circuit. It can be expressed as V = IR, where V is voltage, I is current, and R is resistance.
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