AC Circuit Analysis Quiz

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Questions and Answers

What is the phase angle when power becomes half of its maximum value in an L-C-R circuit?

  • $90^\circ$
  • $60^\circ$ (correct)
  • $30^\circ$
  • $45^\circ$

Which function represents the instantaneous value of alternating current or voltage in an L-R-C circuit?

  • $P_{av} = \frac{2V_0}{\pi}$
  • $E = E_0 \sin(\omega t)$ (correct)
  • $I = I_0 \sin(\omega t)$
  • $V_{avg} = \frac{2V_0}{\pi}$

What is the equation for capacitive reactance, XC, in an L-C-R circuit?

  • $XC = \frac{1}{\omega C}$ (correct)
  • $XC = \frac{1}{\omega R}$
  • $XC = \frac{1}{\omega L}$
  • $XC = \frac{1}{R}$

What is the equation for the impedance, Z, in an L-C-R circuit?

<p>$Z = R^2 + (XL - XC)^2$ (A)</p> Signup and view all the answers

What is the equation for the power, P, in an L-C-R circuit?

<p>$P_{av} = 0$ (D)</p> Signup and view all the answers

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