SUMMARY
Ohm's Law, expressed as V=IR, is applicable to both AC and DC circuits, but its specific formulation differs. For DC circuits, the relationship is straightforward with V=IR, while for AC circuits, the correct expression is V=IZ, where Z represents impedance, incorporating both resistance (R) and reactance (X). Power calculations also differ: for DC, the formulas P=VI, P=V²/R, and P=I²R are valid, whereas for AC, the formula P=VIcos(φ) is used, where φ is the phase angle.
PREREQUISITES
- Understanding of electrical concepts such as voltage, current, and resistance.
- Familiarity with AC and DC circuit characteristics.
- Knowledge of impedance and reactance in AC circuits.
- Basic grasp of power calculations in electrical engineering.
NEXT STEPS
- Study the differences between AC and DC circuit analysis techniques.
- Learn about impedance and how to calculate it in AC circuits.
- Explore power factor and its significance in AC power calculations.
- Investigate advanced applications of Ohm's Law in complex circuit scenarios.
USEFUL FOR
Electrical engineers, students studying circuit theory, and professionals working with AC and DC systems will benefit from this discussion.