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Key Terms
Resistor
An element that ________ the flow of electric current and dissipates energy as heat.
Resistivity (ρ)
A material property that determines how much ________ it offers to current flow, distinct from a component's resistance.
Voltage Source (EMF)
A device that provides the potential ________, or 'push,' that drives current around a circuit, supplying energy to charges.
Ideal Wire
A perfect conductor with zero ________, meaning no voltage drop or energy dissipation across it.
Ohm's Law
The fundamental relationship V = IR, stating that voltage drop across a resistor is directly proportional to ________ and resistance.
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