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electricity:electricity

Electricity

1.Conductors and insulator are materials that let electricity through them or don’t. Metals such as copper are extremely conductive, whereas materials such as wood don’t let electricity pass through at all.

2.If a circuit was not complete it would not be able to flow as there would be a stop and the circuit could not carry on. The electrons would not be able get round there for the lamp for example would not light.  3.If there is no battery or cell in a circuit then the circuit is incomplete. For electrons to travel round a current, it must be complete. Otherwise the circuit is broken and nothing will work or be able to flow.

4.Nine circuit symbols are used to draw a circuit instead of drawing a lamp scientist would use the symbol for a lamp, however a wire doesn’t have a symbol you just use straight lines as the wires.

5.Nine circuit symbols are used to draw a circuit instead of drawing a lamp scientist would use the symbol for a lamp, however a wire doesn’t have a symbol you just use straight lines as the wires.

6.

7.Now open up the discussion to include the energy transfer within the cells. Point out that current flow through all parts of the circuit, including the cells. Since the cells themselves are made of material with resistance there will be some energy lost in the cell. This will increase with current, so there is more loss at higher currents. Although the chemicals that provide the electrical energy are the same ones that are responsible for the cell’s internal resistance (this term can be introduced quite naturally through discussion) it is convenient to separate these two roles so that they end up with an idea of energy transfers as summarised in this diagram.

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10.If you add more lamps in a series circuit the brightness will die down (lessen).

electricity/electricity.txt · Last modified: 2016/05/17 10:09 by sykesn