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Battery and Bulb

Chapter 4 battery and bulb

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Text of Chapter 4 battery and bulb

  • 1. Battery and Bulb

2. Get one wire, one battery, and one bulb.
Using this equipment, try to make the bulb light.
Keep trying if you dont get it right away. Think about different ways you can connect the battery, the bulb, and the wire.
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.
Find out 4 different ways
Can you light the bulb?
3. Battery
Device that converts chemical energy to electrical energy
A combination of two or more electrochemical cells
( negative electrode and positive electrode)
4. Electricity: A variety of phenomena resulting from the presence and flow of eclectic charge
Circuit: pathway which allows electricity to flow

  • Closed circuit: pathway in which all components are connected to allow electricity to flow

5. Open circuit: pathway in which all components arenot connected / does not allow electricity to flow 6. Short circuit: closed circuit where electricity travels along an unintended, alternative path => cause circuit damage, overheating, fire or explosion
Electric Circuit

  • Series circuit:

8. A circuit in which all parts are connected in a single loop 9. There is only one path for electric charges to follow, so the charges moving through a series circuit must flowthrough each part of the circuit. 10. All the bulbs in a series circuit share the same current. 11. What if there is any break in the circuit? => The charges will stop flowing.
Electric Circuit (Cont.)

  • Parallel circuit:

13. There are at least two independent pathsfor electric charges to follow, so each branch of the circuit can work by itself. 14. The bulbs in a parallel circuit do not have the same current. 15. What will happen to the other bulbs if one of the bulbs is removed from its bulb holder? => They are still working because charges still run through the other branches.
Electric Circuit (Cont.)
16. Bulb Observation
Glass Bulb
Low pressure inert gas
Tungsten filament
Contact wire
Contact wire
Support wires
Glass mount / support
Base contact wire
Screw threads
Electrical foot contact
17. Conductor: a substance through which electrical charges can easily flow
Insulator: a material through which electric charges cannot move
18. 19. Electricity does not come from the light switchon the wall; it comes from power generating plants.
More than half of the electricity that is used in the US is provided by burning coal.
One ton (2,000 pounds) of coal can produce 2,500 kilowatts (kwh) of electricity.
About 7,500 pounds of coal is mined every year for every person in the US, most to produce electricity.
Find your states source of electricity from the Energy Information Administration www.eia.doe.gov.
Electricity & Sources of it
20. 21. 22. 23. A form of energy released by an atom
Electromagnetic radiation of a wavelength
What is the light?
24. 25. Conductor
26. Structure of the Bulb
27. 28. 29. 30. 31. Container: A steel can housing the cells ingredients to form the cathode, a part of the electrochemical reaction.
Cathode: Manganese dioxide mixture and carbon. Cathodes are the electrodes reduced by the electrochemical reaction.
Separator: A non-woven, fibrous fabric which separates the electrodes.
Anode: Powdered zinc metal. Anodes are the electrodes that are oxidized.
Electrodes: Where the electrochemical reaction takes place.
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.
Collector: A brass pin in the middle of the cell that conducts electricity to the outside circuit.
Battery Parts