Electric Circuits

1
Electric Circuits

• Chapter 23

2
Review

• What does it take to get electricity to flow?
• What is an open circuit? Closed circuit?

3
Schematic Drawings

• A short-hand used to draw circuits.

4
Things to Remember

• As current flows in a closed circuit, charge will
  lose all of its electric potential by the time it
  returns to the voltage source.
• Current entering a junction equals current
  leaving a junction.
• Electricity takes the path of least
  resistance!!!!

5
Tips for Success

• KNOW what electric potential, current and
  resistance are.
• LEARN the differences and similarities between
  series and parallel circuits.

6
Series Circuit

• A circuit that only allows the current to flow in
  one path.

7
Parallel Circuit

• A circuit that allows the current to take more
  than one path.

8
Applying the facts

• How does the current in each component relate to
  the total current?
• How does the voltage drop across each component
  relate to the total voltage drop?
• How does the resistance of each component relate
  to the total resistance?

9
Series Circuits

• ITIi
• VTSVi
• RTSRi

10
Parallel Circuits

• ITSIi
• VTVi
• (1/RT)S (1/Ri)

11
Understanding Check

• Why must the ammeter be hooked in series?
• Why must the voltmeter be hooked in parallel?
• How is your house wired? Parallel or series?
• What do fuses and circuit breakers do?
• How do fuses and circuit breakers work?