# Electric Circuits

## Concepts:

(A detailed list of terms & objectives is available.)

• Electric Circuits
• Series Circuits
• Single pathway
• When one device fails, all fail
• Voltage (and energy) must be shared by all devices in the circuit
• Equivalent (total) resistance is the sum of the individual resistances
• Total voltage equals the sum of individual voltages
• Current = Voltage/Total resistance (Ohm's Law)
• Ohm's Law applies to each separate device
• Quiz on series circuits
• Parallel Circuits
• Voltage is the same across each device
• Ohm's Law applies separately to each branch
• Total current is the sum of the branch currents
• Equivalent (total) resistance decreases as the number of branches increases
• Equivalent (total) resistance of 2 equal resistances is half the individual resistance
• Equivalent (total) resistance of 2 parallel branches is less than the smallest resistance
• Home circuits connected in parallel
• Total current increases as each device is added
• Total energy supplied increases as each device is added
• short circuits
• fuses & circuit breakers
• Quiz on parallel circuits
• Comparing Series and Parallel Circuits
• Compound Circuits
• Equivalent resistance
• Applying Ohm's Law
• total current
• separate components
• Analyzing Simple Circuits - a Summary

## Supplements:

• The Best From Conceptual Physics Alive (Videodisc)
• Chapter 7 - Demo: Electric Circuits - demonstrates series and parallel circuits (5:28)