Series RLC Circuits

Question 1

Who is the stroboscopic effect of a two-lamp fluorescent fixture reduced?

Answer 1

A capacitor in the ballast is connected in series with one of the lamps

Question 2

How may the starting torque of a single phase motor be improved?

Answer 2

A capacitor may be connected in series with the start winding of the motor

Question 3

Identify a possible hazard when connecting a series RLC circuit

Answer 3

If the circuit is at or near resonance, the voltage drops across the components could be greater than the supply voltage

Question 4

How is the phase angle of a series circuit affected if the total resistance of the circuit is increased?

Answer 4

decreases

Question 5

A series RLC circuit has a lagging power factor. How does the circuit current change if the total inductive reactance is increased?

Answer 5

decreases

Question 6

A certain series RLC circuit had a leading power factor. How does the total impedance change if the capacitive reactance decreases, but the circuit continues to have a leading power factor?

Answer 6

decreases

Question 7

A series RLC circuit is operating at unity power factor. How does the circuit current change if the supply frequency is decreased?

Answer 7

decreases

Question 8

The net reactance of a series circuit containing a capacitor and an inductor is determined by what?

Answer 8

adding the values of X(C) and X(L)