# Capacitors in Parallel

Capacitors store charge on their plates

Capacitors in parallel can be replaced with an equivalent capacitor

# Capacitors in Series

Charge on capacitors must be the same

Capacitors in series replaced with an equivalent capacitor

# RC Circuits

RC Circuits are circuits comprised of a source of potential difference, a resistor network, and one or more capacitors

We will look at RC circuits from the steady-state perspective

What happens when first turned on

What happens after a "long" time has elapsed

Key to understanding RC Circuit Performance

Uncharged capacitors act like wires

Charged capacitors act like opens

# Charging an RC Circuit

# Discharging an RC Circuit

# The Time Constant

# Example 1: RC Analysis

What is the current through R2 when the circuit is first connected?

What is the current through R2 a long time after the circuit has been connected?

# Example 2: More RC Analysis

What is the current through R3 when the circuit is first connected?

What is the current through R2 a long time after the circuit has been connected

# Example 3: Equivalent Capacitance

What is the equivalent capacitance of the capacitor network shown below?

# Example 4: More Equivalent Capacitance

What is the equivalent capacitance of the capacitor network shown below?

# 2010 Free Response Question 2

# 2004 Free Response Question 2