ALTERNATING CURRENT AND DIRECT CURRENT
2 marks · EasyA small fan operates at a power of 10 W. How much energy does it transfer in 3 minutes?
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1800 J (±3)
Also accept: 1.8 kJ; 1800; 1800 joules
Common mistakes: Failing to convert time to seconds
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Marking points
M1 · 1 mark · Converts 3 minutes to 180 seconds and recalls E = P × t.
A1 · 1 mark · Multiplies 10 W × 180 s to get 1800 J.
Worked solution
Convert 3 minutes to seconds: 3 × 60 = 180 s.