Practice Pure Capacitor In Ac (3.3) - Electromagnetic Induction and Alternating

Practice: Pure Capacitor in AC

Lesson 3.3Electromagnetic Induction and Alternating

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10 questions

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3 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Explain the phase relationship between current and voltage in a pure capacitor.
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Think about how the charging process of a capacitor works.
Question 2.
What happens to the average power consumed by a pure capacitor?
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Consider what happens during a full AC cycle.
3Question 3.
What is the phase relationship between current and voltage in a pure capacitor?
- Current leads voltage by 90 degrees
- Current lags voltage by 90 degrees
- Current and voltage are in phase
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Recall the definition of current and voltage phase relationships.
4Question 4.
True or False: The average power consumed by a pure capacitor is greater than zero.
- True
- False
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Think about the role of a capacitor in AC circuits.
Question 5.
Calculate the peak current through a 15µF capacitor connected to an AC voltage of 120V at a frequency of 60Hz.
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Start by calculating the angular frequency and then apply it in the current formula.
Question 6.
Explain how a pure capacitor affects the power factor in an AC circuit when used in conjunction with resistive and inductive loads.
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Mix knowledge of capacitors with power factor concepts.

6 more questions in this section. Enroll free to practise them all.