The document describes an RLC series circuit containing a fully charged capacitor, inductor, and resistor. When the switch is closed at time t=0, the capacitor begins discharging and current oscillates through the circuit. The resistor dissipates some of the current, resulting in an underdamped oscillation where the amplitude of the current falls to 50% of its initial value over time.

1. RLC Series Circuit
Fully charged capacitor
At t = 0, switch S is closed
Like LC circuit
capacitor discharges
Current oscillates
Resistor dissipates current

2. RLC Series Circuit

3. RLC Series Circuit
underdamped

4. Transformers

5. Seatwork 2
1. Electrical oscillations are initiated in a series circuit containing a capacitance C,
(a) If ≪ 4 / (weak damping), how much time elapses before the amplitude
inductance L, and resistance R.
of the current oscillation falls of to 50.0% of its initial value?
(b) How long does it take the energy (of the capacitor) to decrease to 50.0% of its
initial value?
2. The primary coil of a transformer contains 100 turns; the secondary has 200 turns.
The primary coil is connected to a size AA battery that supplies a constant voltage of 1.5
volts. What voltage would be measured across the secondary coil?
3. A transformer is intended to decrease the rms value of the alternating voltage
from 500 volts to 25 volts. The primary coil contains 200 turns. Find the necessary
number of turns in the secondary coil.
4. A transformer is intended to decrease the rms value of the alternating
current from 500 amperes to 25 amperes. The primary coil contains 200 turns.
Find the necessary number of turns in the secondary coil.
5. The primary coil of a transformer has 200 turns and the secondary coil has 800
turns. The power supplied to the primary coil is 400 watts. What is the power
generated in the secondary coil if it is terminated by a 20-ohm resistor?