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The Electron
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Cells and batteries
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Potential Difference & Voltage
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Series and parallel
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Circuit Diagram Symbols
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Polarity sensitive
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Direct Current
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Alternating Current
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Re-Cap
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Units
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Resistance
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Formula Relationships
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V = I x R
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P = V x I
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Circuit Diagrams
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Prefixes milli, kilo and Mega.
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Frequency
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50Hz Mains voltage
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Faster Frequencies
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AF and RF
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Sine Wave
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Frequency allocation table
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Frequency and wavelength conversion
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