1 / 20

2 nd Hour Agenda

2 nd Hour Agenda. Teaming Batteries Introduction to Ohms Law. Collaborative Learning. Positive Interdependence Share responsibilities (sink or swim together) Be sure that all team members learn the material Your success is linked to the success of your teammates Involve each team member

roy
Download Presentation

2 nd Hour Agenda

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. 2nd Hour Agenda Teaming Batteries Introduction to Ohms Law EGR 101

  2. Collaborative Learning • Positive Interdependence • Share responsibilities (sink or swim together) • Be sure that all team members learn the material • Your success is linked to the success of your teammates • Involve each team member • Each team member’s efforts are required for success • No “free riders” EGR 101

  3. Code of Collaboration • Every team member is responsible for the team’s progress and success! • Attend all classes and team meetings • Be on time • Come prepared • Carry out assignments on schedule • Be an active listener • Listen to and show respect for the contributions of the other team members • Constructively criticize ideas, not people • Resolve conflicts and avoid disruptive behavior EGR 101

  4. Code of Collaboration • Avoid disruptive side conversations • Only one person speaks at a time • Everyone participates, no one dominates • Be brief and to the point • Avoid long anecdotes and examples • Set a norm for behavior • “Code of Conduct” for your team EGR 101

  5. Out-of-Class Team Activity • Work together to develop your own team’s Code of Conduct • What do you expect of each other?Make your expectations explicit (like attending all meetings, arriving on time, prepared, etc) • What are the consequences if someone fails to meet expectations? • Due at the beginning of class next Tuesday EGR 101

  6. Where Does Current Come From? • The free electrons in a conductor need to be replaced when they move through the conducting medium (the wire). • These electrons are replaced by electrons from a source of energy such as a battery. EGR 101

  7. Circuit Components • Batteries + + EGR 101

  8. Source of Voltage in a Battery • A chemical reaction within the battery separates positive and negative ions(charged atoms) • When the battery is connected to a circuit, the negative charge move toward the positive charge and a current is produced • The amount of current is constrained by the resistance of the circuit EGR 101

  9. Example of A Battery The source of energy E in (Joules) releases charges Q in (Coulombs) Voltage (V) – the difference in potential that uses E = one Joule (J) of energy to move a charge Q = one coulomb (C). EGR 101

  10. Current Direction We will adopt “Conventional Flow” for all of our work! EGR 101

  11. Mathematical Relation • E: Energy required to move charges in Joules (J). • Q: Charge value in Coulombs (C). • V: Voltage or potential difference across the battery's posts in volts (V). • Thus, V = E / Q. • In units: 1 Volt = 1 Joule/Coulomb EGR 101

  12. Team In-class Activity (15 minutes) • A 10 V source uses 2 Joules of energy per second. Calculate the current being used by the source. • Hint, turn the word problem into equations; write down what you know. EGR 101

  13. When batteries are connected with their polarities in the same direction, they are in a series-aiding arrangement. EGR 101

  14. When batteries are connected with their polarities in the opposite direction, they are in a series-opposing arrangement. EGR 101

  15. In Class Activity • What is the total voltage between terminals A and B in the figure below?Which terminal is at a higher potential? A B 9V 4V 15V EGR 101

  16. Introduction to Ohm’s Law • A 1 Ohm resistance limits the current to 1 Amp when 1 Volt is applied. V = I.R EGR 101

  17. Ohm’s Law • Three forms: • Use the form that best describes the quantity that you are trying to determine EGR 101

  18. Determine the Current I + _ EGR 101

  19. Determine the Voltage + _ EGR 101

  20. Determine the Resistance + _ EGR 101

More Related