1. ELECTRICITY PPT COMPILED & EDITED BY MUKESH KUMAR CHHIPA TGT WE K V 2 AJMER (RAJ.) 9269048633(M)

2. Electricity Theory VIR PIV and Capacitors!!!

3. Energy  When an object is at some height in a gravitational field it is said to have gravitational potential energy, PE g PE g

4. Potential Difference

6.  Back to the zero point  A convenient zero point to chose in a circuit or any electric system is the “ground”

7. Battery (cells)  A battery produces electricity by transforming chemical energy into electrical energy

8. Battery Carbon Electrode Zinc Electrode Sulfuric Acid +

10. Capacitor  A capacitor is a storehouse of charge and energy that can be reclaimed when needed for a specific application  A capacitor will only charge to the potential difference between the terminals of the battery

11. Capacitance  Capacitance, C: The ability of a conductor to store energy in the form of electrically separated charges  Capacitance is the ratio of charge to potential difference

12. Charge Movement

14. Circuit Analogy

15. Types of Current  AC  Alternating current  charges continuously change direction forward and back at 60 Hz  Example: outlets (approx 120 V)  DC  Direct current  charges move in one direction  Example: batteries AC-DC Debate births the Electric Chair

18. Resistance  Resistance is the impedance of the motion of charge through a conductor  The ratio of potential difference across a conductor to the current it carries

19. Ohm’s Law

20. Resistance  Depends on: Length, cross sectional area, material, and temperature

21. Resistance and Temp

22. Resistance and Thickness

23. Resistor  An electronic element that provides a specified resistance.  A current or voltage REGULATOR

24. Power (it’s Electric!)  Power: Rate at which work is done. OR Rate at which energy is transformed  Electric Power: The rate at which charge carriers convert PE E into non-mechanical energy

25. Reading and Homework  Read Chapter 17 pp 593 - 625  HW due on test day: p 599 1-3; p 601 2, 3, 5-9; p 607 1 – 4 (B); p609 1 – 5 p 615 1 – 6; p 616 2-4, 7,9 p 621 1 – 5  Extra Practice p 626 – 628 11, 20 – 54