UNITS
2 marks · NormalA light bulb is connected to a power supply. The supply provides a voltage of 6.0 V, and a current of 0.40 A passes through the bulb. Calculate the power delivered to the bulb. Give your answer to 2 significant figures and include the correct unit.
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2.4 W (±0.1)
Common mistakes: incorrect multiplication; wrong decimal place
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Marking points
M1 · 1 mark · Uses the correct formula: P = IV
A1 · 1 mark · Correct value (2.4 W) to two significant figures
Worked solution