Electricity
Your child will build circuits on paper the way electricians wire homes. Electricity usually fetches about seven marks, frequently an Ohm-law question plus series-parallel combination numerics. Learners verify Ohm law from measurements, study the factors deciding wire resistance, compare resistors joined in series with those in parallel, explain the heating effect inside fuses, bulbs and heaters, define electric power in watts with the commercial unit of energy, and show how careful circuit design keeps homes lit safely and affordably. Three confusions persist. Students add parallel resistors
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