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3 cards from this section. Quick, good the night before a test.
What is the formula for calculating average power in AC circuits?
Think about RMS values and power factor.
What is a power factor of 1 indicate?
Consider what it means when voltage and current are in phase.
What is the average power formula in AC circuits?
Remember, it's about effective voltage and current!
True or False: A power factor of 1 means there is no energy loss in the circuit.
Recall the meaning of power factor in relation to energy loss.
An electric heater operates at 240V and 10A with a power factor of 0.95. If the average power consumed is needed for a 24-hour usage, how much energy in kilowatt-hours does it consume?
Remember to convert watts to kilowatts when calculating energy.
A factory's machine draws 15A at 480V with a lagging power factor of 0.4. Calculate the average power and discuss its implications.
What does a low power factor signify for energy bills?
6 more questions in this section. Enroll free to practise them all.
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