Direct Current and Alternating Current
Sources and graphs · Frequency 50 Hz · The rectifier
Define direct and alternating current
Read the time current graph of each
Explain frequency and what 50 Hz means
Match appliances to currents and describe a rectifier
Rechargeable emergency lamps and torches
Solar panel, battery and inverter
Battery charged from the mains, with an inverter
Petrol or diesel generators
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