Practice Instantaneous Power (p(t)) (5.1) - Fundamentals of AC Circuits
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Instantaneous Power (p(t))

Practice - Instantaneous Power (p(t))

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is the formula for instantaneous power in an AC circuit?

💡 Hint: Think about the two main components that contribute to power.

Question 2 Easy

What does it mean when we say instantaneous power oscillates?

💡 Hint: Consider the nature of AC waveforms.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the formula for instantaneous power in AC circuits?

p(t) = v(t) * i(t)
p = iv
p(t) = v(t) + i(t)

💡 Hint: Think about multiplication of the two key variables.

Question 2

True or False? Instantaneous power remains constant in an AC circuit.

True
False

💡 Hint: Consider the AC nature of voltage and current.

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Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Calculate the instantaneous power for an AC circuit with v(t) = 150 sin(100πt) and i(t) = 5 sin(100πt + 60°). Derive the expression and evaluate at t = 0.02 seconds.

💡 Hint: Expand the sin(a + b) expression.

Challenge 2 Hard

If an AC system has a current i(t) = 10 sin(ωt + 30°) and the average power is known to be 500 W, find the peak voltage necessary to maintain this power.

💡 Hint: Recall that P_avg = V * I * cos(ϕ).

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Reference links

Supplementary resources to enhance your learning experience.