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# Chapter 4 battery and bulb

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### Chapter 4 battery and bulb

1. 1. Battery and Bulb<br />
2. 2. Get one wire, one battery, and one bulb.<br />Using this equipment, try to make the bulb light.<br />Keep trying if you don’t get it right away. Think about different ways you can connect the battery, the bulb, and the wire.<br />As you try each different arrangement, draw it on the piece of paper. Draw arrangements both that lighted the bulb and that did not light the bulb.<br />Find out 4 different ways<br />Can you light the bulb? <br />
3. 3. Battery<br />Device that converts chemical energy to electrical energy<br />A combination of two or more electrochemical cells <br /> ( negative electrode and positive electrode)<br />
4. 4. Electricity: A variety of phenomena resulting from the presence and flow of eclectic charge<br />Circuit: pathway which allows electricity to flow<br /><ul><li>Closed circuit: pathway in which all components are connected to allow electricity to flow
5. 5. Open circuit: pathway in which all components are not connected / does not allow electricity to flow
6. 6. Short circuit: closed circuit where electricity travels along an unintended, alternative path </li></ul> => cause circuit damage, overheating, fire or explosion<br />Electric Circuit<br />
7. 7. <ul><li>Series circuit:
8. 8. A circuit in which all parts are connected in a single loop
9. 9. There is only one path for electric charges to follow, so the charges moving through a series circuit must flow through each part of the circuit.
10. 10. All the bulbs in a series circuit share the same current.
11. 11. What if there is any break in the circuit? </li></ul> => The charges will stop flowing.<br />Electric Circuit (Cont.)<br />
12. 12. <ul><li>Parallel circuit:
13. 13. There are at least two independent paths for electric charges to follow, so each branch of the circuit can work by itself.
14. 14. The bulbs in a parallel circuit do not have the same current.
15. 15. What will happen to the other bulbs if one of the bulbs is removed from its bulb holder? </li></ul> => They are still working because charges still run through the other branches. <br />Electric Circuit (Cont.)<br />
16. 16. Bulb Observation <br />Glass Bulb<br />Low pressure inert gas<br />Tungsten filament<br />Contact wire<br />Contact wire<br />Support wires<br />Glass mount / support<br />Base contact wire<br />Screw threads<br />Insulation<br />Electrical foot contact<br />
17. 17. Conductor: a substance through which electrical charges can easily flow<br />Insulator: a material through which electric charges cannot move<br />
18. 18.
19. 19. Electricity does not come from the light switch on the wall; it comes from power generating plants. <br />More than half of the electricity that is used in the US is provided by burning coal. <br />One ton (2,000 pounds) of coal can produce 2,500 kilowatts (kwh) of electricity.<br />About 7,500 pounds of coal is mined every year for every person in the US, most to produce electricity. <br />Find your state’s source of electricity from the Energy Information Administration www.eia.doe.gov.<br />Electricity & Sources of it<br />
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23. 23. A form of energy released by an atom <br />Electromagnetic radiation of a wavelength<br />What is the light?<br />
24. 24.
25. 25. Conductor<br />http://can-do.com/uci/lessons99/electricity.html<br />
26. 26. Structure of the Bulb<br />
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31. 31. Container: A steel can housing the cell’s ingredients to form the cathode, a part of the electrochemical reaction.<br />Cathode: Manganese dioxide mixture and carbon. Cathodes are the electrodes reduced by the electrochemical reaction.<br />Separator: A non-woven, fibrous fabric which separates the electrodes.<br />Anode: Powdered zinc metal. Anodes are the electrodes that are oxidized. <br />Electrodes: Where the electrochemical reaction takes place.<br />Electrolyte: A potassium hydroxide solution in water. The electrolyte is the medium for the movement of ions within the cell and carries the ionic current inside the battery. <br />Collector: A brass pin in the middle of the cell that conducts electricity to the outside circuit. <br />Battery Parts<br />