Printable worksheet ยท 4 of 4
Relate energy transfer to current and voltage - Paper 4
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Ideal device has constant potential difference 15 V and current 0.2 A for 40 s. Use P=VI and E=Pt. In a separate run it operates at this same power for two hours. Use W and seconds for joules, or kW and hours for kWh. No mains work is requested.
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