Chapter 32

Question 1

An AC source drives an RLC circuit with a fixed voltageamplitude. If the driving frequency is1, the circuit ismore capacitive than inductive and the phase angle is–10°. If the driving frequency is2, the circuit is moreinductive than capacitive and the phase angle is +10°. Atwhat frequency is the largest amount of power deliveredto the circuit?
(a) It is largest at1.
(b) It is largest at2.
(c) The same amount of power is delivered at bothfrequencies.

Answer 1

c

Question 2

What is the impedance of a series RLC circuit atresonance?
a) larger than R
(b) less than R
(c) equal to R(
d) impossible to determin