series and parallel circuits l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Series and Parallel Circuits PowerPoint Presentation
Download Presentation
Series and Parallel Circuits

Loading in 2 Seconds...

play fullscreen
1 / 30

Series and Parallel Circuits - PowerPoint PPT Presentation


  • 739 Views
  • Uploaded on

Series and Parallel Circuits. Circuits. Can either be series or parallel. Series. Current only takes one path for electrons Current flows through every part of the circuit. Lights in a Series. Series. If you add a resistor (like another light):

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Series and Parallel Circuits' - Rita


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
circuits
Circuits
  • Can either be series or parallel.
series
Series
  • Current only takes one path for electrons
  • Current flows through every part of the circuit
series5
Series
  • If you add a resistor (like another light):
    • Total resistance goes UP since all the current has must go through each resistor.
adding resistors to series
Adding Resistors to Series:
  • Current in the circuit will go DOWN (lights will dim)
  • If you remove a light bulb or one burns out—all go out!
current in series
Current in Series
  • Current is the same at all points
  • Use Ohm’s Law to find current using resistance and voltage
voltage in series
Voltage in Series
  • Voltage is reduced by each resistance – voltage drop
resistance in series
Resistance in Series
  • Add up all resistors to get total
    • Total resistance will go up because all of the current must go through each resistor.
sample problem 1
Sample Problem #1
  • Draw a series circuit with two 1.5 V batteries, 3 resistors, and a current of 0.5 A.
  • What is the total voltage of the circuit?
  • What is the resistance of each resistor?
  • What is the voltage drop across each resistor? Label on your circuit.
parallel circuits
Parallel Circuits
  • Has at least one point where current divides
  • More than one path for current to flow
  • Paths are also known as branches
parallel
Parallel:
  • If you add a resistor:
    • Total resistance goes down
    • Total current goes up when you add another path
removing a light bulb
Removing a Light Bulb
  • If you remove a light bulb or one burns out, the others stay on because the circuit is still closed.
current in parallel
Current in Parallel
  • Current flows into a branching point, the same total current must flow out again
  • Current depends on resistance in each branch
voltage in parallel
Voltage in Parallel
  • Voltage is the same across each branch – because each branch is on the same wire
resistance in parallel
Resistance in Parallel
  • Calculate current in each branch based on resistance in each branch by using Ohm’s Law
practice problem 2
Practice problem #2
  • Draw a parallel circuit with two resistors (one on each branch) and a 12 V battery.
  • What is the voltage through each resistor?
  • What is the current flowing through each branch?
toll booth explanation
Toll Booth Explanation
  • Adding toll booths in series increases resistance and slows the current flow.
  • Adding toll booths in parallel lowers resistance and increases the current flow.
slide28
In series—The voltage is increased.
  • In parallel—No change in voltage; these batteries will last longer!
one more final thing
One More FINAL Thing:
  • Two Types of Current:
  • DC—Direct Current—produced by solar cells and chemical cells (batteries)
  • Current only flows in one direction.
2 nd type of current
2nd type of current:
  • AC—Alternating Current
  • Current flows back and forth (alternates)
  • Found in homes
  • Generators produce AC current