Practice Power In Ac Circuits (9.5) - Alternating Current

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10 questions

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6 sample questions

Question 1.
What is the formula for instantaneous power?
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Remember, it involves voltage and current at a single moment.
Question 2.
Define average power in an AC circuit.
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Think of it as a measure over time.
3Question 3.
What formula is used to calculate instantaneous power?
- P(t)=V(t) + I(t)
- P(t)=V(t) ⋅ I(t)
- P(t)=V(t)/I(t)
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Think about how power is connected to both voltage and current.
4Question 4.
A power factor of 1 means that:
- True
- False
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Recall the definition of power factor and its implications.
Question 5.
In an AC circuit with maximum voltage of 120V and phase difference of 30 degrees, calculate the average power if the RMS current is 10A.
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Use the formula for average power!
Question 6.
An AC appliance consumes 1500W with a power factor of 0.6. What type of load is it?
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Recall characteristics of inductive and capacitive loads.

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