RLC Circuit

Complex number can be expressed in the form of

• polar

• angular

• rectangular

• non-polar

Which item have the same way of finding I and V like a resistor?

• Diode

• Capacitor

• Transformer

• Inductor

What are the components in a power triangle?

• Apparent power, S

• Reactive power, Q
  

• Real power, P
  

• Phase angle

Choose the ones with the correct unit

• P [W]

• S [VA]

• S [VAR]

• P [kW]

Calculation involving power must use _______ value of voltage and current

• corresponding

• supply

• root mean square (rms)

• total

What is the difference between apparent power, |S| and complex power, S?

• Both have the unit VA

• |S| has direction and magnitude, S has magnitude only

• Both involve rms value of current and voltage

• S has direction and magnitude, |S| has magnitude only

What are the axis label of a phasor diagram between voltage and current?

• X

• Y

• Re

• Im

Formula for inductive capacitance is...

• $\frac{1}{2\pi fC}$

• $\frac{1}{2\pi fL}$

• It does not exist

• $2\pi fC$

The formula to find X_C is

• $\frac{1}{2\pi fC}$

• $2\pi fC$

• $\frac{1}{2}\pi fC$

• $\omega fC$

Impedance is

• Z = R + j(X_L - X_C)

• Z = R + j(X_L + X_C)

• Z = R + jX_L - jX_C

• Z = R + jX_L + jX_C