Battery and Bulb

1. Get one wire, one battery, and one bulb.

2. Using this equipment, try to make the bulb light.

3. Keep trying if you don’t get it right away. Think about different ways you can connect the battery, the bulb, and the wire.

4. 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.

5. Find out 4 different ways

Can you light the bulb?

Device that converts chemical energy to electrical energyA combination of two or more electrochemical cells

( negative electrode and positive electrode)

Battery

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

Open circuit: pathway in which all components are not connected / does not allow electricity to flow

Short circuit: closed circuit where electricity travels along an unintended, alternative path => cause circuit damage, overheating, fire or explosion

Electric Circuit

Series circuit:• A circuit in which all parts are connected in a

single loop • 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.

• All the bulbs in a series circuit share the same current.

• What if there is any break in the circuit? => The charges will stop flowing.

Electric Circuit (Cont.)

Parallel circuit: • There are at least two independent paths

for electric charges to follow, so each branch of the circuit can work by itself.

• The bulbs in a parallel circuit do not have the same current.

• 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.)

Bulb Observation

Glass Bulb

Low pressure inert gasTungsten filamentContact wireContact wireSupport

wiresGlass mount / support

Base contact wireScrew

threads Insulation

Electrical foot contact

Conductor: a substance through which electrical charges can easily flow

Insulator: a material through which electric charges cannot move

Electricity does not come from the light switch on 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 state’s source of electricity from the Energy Information Administration www.eia.doe.gov.

Electricity & Sources of it

A form of energy released by an atom Electromagnetic radiation of a wavelength

What is the light?

Conductorhttp://can-do.com/uci/lessons99/electricity.ht

ml

Structure of the Bulb

Container: A steel can housing the cell’s 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