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Electricity and Energy Resources

Ch. 7, 8, 9. Electricity and Energy Resources. Ch. 7 Electricity. Ch. 7 Electricity. Ch. 7 Electricity Bellringer. WRITE the question. USE your book. What kind of charged particle is attracted to a positive charge? What is electric current made of? Define: Voltage Resistance Insulators.

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Electricity and Energy Resources

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  1. Ch. 7, 8, 9 Electricity and Energy Resources

  2. Ch. 7 Electricity

  3. Ch. 7 Electricity

  4. Ch. 7 Electricity Bellringer • WRITE the question. USE your book. • What kind of charged particle is attracted to a positive charge? • What is electric current made of? • Define: • Voltage • Resistance • Insulators

  5. Ch. 7 Electricity Voltage Difference is the force that causes electric charges to flow

  6. Ch. 7 Electricity

  7. Ch. 7 Electricity

  8. Ch. 7 Electricity

  9. Ch. 7 Electricity

  10. Problems to Solve • Calculate the voltage difference in a circuit with 25 ohms resistance if the current is 0.5 amps. • A current of 5 amps flows in a 600 watt light bulb. The voltage difference between the filament ends is 120V. What is the resistance of the filament?

  11. Problems to Solve 3. What kind of a circuit is this?

  12. Problems to Solve 2. What kind of a circuit is this?

  13. Problems to Solve 5. A toaster is plugged into an outlet where the voltage is 120V. How much power does it use if the current is 10A? 6. A VCR on powersave mode (not on) still uses 10 W of power. What is the current if the VCR is plugged into 220 V? 7. A flashlight bulb uses 2.4 W of power when the current in the bulb is .8 A What is the voltage difference supplied by the battery?

  14. Problems to Solve 8. A microwave with a power rating of 1,200 W is used for .25 h. How much electrical energy is used by the microwave? 9. A refrigerator operates for about 18 hours a day. The 700 W rating on a fridge means it uses ________ of electrical energy each day.

  15. Ch. 8 Magnetism Magnetic Poles

  16. Ch. 8 Magnetism

  17. Ch. 8 Magnetism

  18. Ch. 8 Magnetism • The magnetic flux lines up the compass arrows along their North-South orientation

  19. Ch. 8 Magnetism

  20. Ch. 8 Magnetism • What happens when the current is reversed?

  21. Ch. 8 Magnetism • Electric Motors

  22. Ch. 8 Magnetism • Electric Motors

  23. Ch. 8 Magnetism • When electric current travels through a wire a magnetic field forms. Notice the change in direction. Why?

  24. Ch. 8 Magnetism • When electric current travels through a wire a magnetic field forms. By forming many loops why is the magnetic field increased?

  25. Ch. 8 Magnetism • When electric current travels through a wire a magnetic field forms. By forming many loops why is the magnetic field increased? • http://science.howstuffworks.com/electromagnet2.htm

  26. Ch. 8 Magnetism • Successfully write and answer #1-13 p. 218 & #1-14, p. 250In groups describe how an electrical generator works. Video answers.

  27. Ch. 8 Magnetism • Remember the “Right Hand Rule” to determine the direction of the magnetic flux caused by a current.

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