Ch' 23 Series and Parallel Circuits

1
Ch. 23Series and Parallel Circuits

• Milbank High School

2
Sec. 23.1Simple Circuits

• Objectives
• Describe both a series connection and a parallel
  connection and state the important
  characteristics of each
• Calculate current, voltage drops, and equivalent
  resistance for devices connected in series and in
  parallel
• Describe a voltage divider and solve problems
  involving one

3
Series Circuits

• Charge only has one path to follow
• Potential difference (voltage drop)
• V IR
• In an electrical circuit, Vsource is equal to the
  voltage drops across your resistors
• R Ra Rb .
• Net change in potential of current is zero
• Battery or generator raises potential

4
Voltage drops

• As current passes through a resistor, the
  potential drops an amount equal to the increase,
  and therefore, the net change in zero
• Voltage divider
• Produces a voltage of desired magnitude
• Specialized resistor

5
Parallel Circuits

• Several current paths

6
Sec. 23.2 Applications of Circuits

• Objectives
• Explain how fuses, circuit breakers, and
  ground-fault interrupters protect house-hold
  wiring
• Analyze conbined series-parallel circuits and
  calculate the equivalent resistance of such
  circuits
• State the important characteristics of voltmeters
  and ammeters, and explain how each is used in
  circuits