Ohm's Law & Resistance

Inside this lesson

Apply Ohm's law V = IR to compute voltage, current, or resistance for a resistor
Calculate conductance G = 1/R and use it in circuit analysis
Determine resistance from resistivity, length, and cross-sectional area using R = ρL/A
Derive and apply the power formulas P = I²R and P = V²/R for a resistor

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Educational content covering topics typical of a first- and second-year electrical engineering curriculum. Not a substitute for accredited coursework, and not suitable for real circuit or system design without review by a licensed professional engineer.