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-Difference between:
conventional current and electrical current
- electric circuit symbols
- units and symbols

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atom theory
meaning of positive and negative charge
what is a conductor and insulator

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How
-> friction
->electroscope
-> contact or conduction
-> van de Graaf generator
-> induction

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Effect of length, cross sectional area to resistance

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Resistance, voltage and current in series and parallel

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-> what is power
-> how is it calculated
-> efficiency problems