What is the unit of measure for electrical power?
• Ohm’s Law basics: how voltage, current, resistance, and power relate • Difference between electrical current, voltage, capacitance, and power • Common unit used to rate the power output of motors, lights, and generators
• Ask yourself: which of these units is used when you talk about how much work per second an electrical device can do? • Which unit appears on light bulbs and generators when showing how much power they consume or produce? • Which of these units is associated with current, which with voltage, which with capacitance, and which with power?
• Match power with the correct physical concept: rate of doing work or energy per unit time • Mentally pair: ampere = current, volt = voltage, farad = capacitance and see what’s left for power • Think of typical ratings like "100 ___" on a light bulb and identify what unit normally fills that blank
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