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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for calculating average power in AC circuits?
π‘ Hint: Think about RMS values and power factor.
Question 2
Easy
What is a power factor of 1 indicate?
π‘ Hint: Consider what it means when voltage and current are in phase.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the average power formula in AC circuits?
- P = VI
- P = V_{rms} I_{rms} cosΟ
- P = I^2 R
π‘ Hint: Remember, it's about effective voltage and current!
Question 2
True or False: A power factor of 1 means there is no energy loss in the circuit.
- True
- False
π‘ Hint: Recall the meaning of power factor in relation to energy loss.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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?
π‘ Hint: Remember to convert watts to kilowatts when calculating energy.
Question 2
A factory's machine draws 15A at 480V with a lagging power factor of 0.4. Calculate the average power and discuss its implications.
π‘ Hint: What does a low power factor signify for energy bills?
Challenge and get performance evaluation