Concept #1: LC Circuits

Practice: An LC circuit with an inductor of 0.05 H and a capacitor of 35 μF begins with the current of -1A. The capacitor plates have a maximum charge of 2.65mC at any time during the oscillation. What is the phase angle of this oscillation?

Example #1: Oscillations in an LC Circuit

Concept #2: Energy in an LC Circuit

Practice: In an oscillating LC circuit in which the capacitance C = 4μF and the maximum voltage across the capacitor V = 1.50V, the maximum current measured across the inductor is 50mA. What is the angular frequency of this LC circuit?

A charged capacitor with C = 8.00 x 10-9 F is connected to an inductor with L = 5.00 H. The resistance of the circuit can be neglected. At the instant when the current in the inductor is increasing at a rate of 70.0 A/s, what is the charge on the capacitor?

A charged capacitor with C = 4.00 x 10 -12 F and initial charge Q = 8.00 x 10 -6 C is connected to an inductor that has L = 4.0 H. During the subsequent current oscillations, what is the maximum current in the inductor?
A) 2.0 A
B) 4.0 A
C) 6.0 A
D) 8.0 A
E) None of the above answers

Which LC circuit shown has the largest period of oscillation?

The circuit on the left has an oscillation frequency of 400 Hz. The frequency of the circuit on the right is?
a. 200 Hz
b. 282.8 Hz
c. 400 Hz
d. 565.7 Hz
e. 800 Hz