Electrical power

1 mark · Normal

Which of the following light bulbs transfers the most electrical energy every second?

AA 30 W bulbBA 50 W bulbCA 60 W bulbDA 70 W bulb

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Correct option: A 70 W bulb

Common mistakes: Choosing the bulb with the lowest wattage

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Marking points

B1 · 1 mark · Correctly selects 'A 70 W bulb'.

Worked solution

The bulb with the highest power rating (70 W) transfers the most energy per second.

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