AC Theory Exam 2025 With 100% Correct Answers

AC Theory Exam 2025 With 100%
Correct Answers

If the frequency is increased in a series RL circuit, the current will ____ - CORRECT ANSWER✔✔-
decrease

increase

increase proportionally with the frequency

remain the same



In general, when either the resistance or the inductive reactance in a circuit is ______ the other,
the smaller value can be ignored. - CORRECT ANSWER✔✔half as much as

-ten times greater than

three times as great as

twice as great as



What is the power factor for the circuit in the figure below? Given; R = 250 Ohms L = 500 mH
120V 60Hz



Xl = { 2pi (60) (.5)}

Z = Square root of 250^2 + 188.4^2

PF = 250/313 x 100 - CORRECT ANSWER✔✔66.3%

-79.9%

87.6%

125.2%

, When analyzing a series RC circuit, ________ is used as the reference. - CORRECT ANSWER✔✔-
current

reactance

resistance

voltage



What is the applied voltage for the circuit in the figure below? Given; 60 Hz, Er = 118V, Ec =
209V



Eapp = square root of 118^2 + 209^2

=square root of 13,924 + 43681

=square root of 57,605

240 - CORRECT ANSWER✔✔120 volts

208 volts

-240 volts

327 volts



What is the capacitive reactance of a series RC circuit containing a 100uF and a 200uF capacitor
when supplied by 500 Hertz power?



Ct = C1 + C2

Xc = 1/2pi (500) (300)

= .28 (150,000)

= ,000

=0.0000011 - CORRECT ANSWER✔✔-1.1 microohms

3.0 microohms

4.8 Ohms