Physics for IGCSE & O level - Electricity (Section 5 - No. 20) | ExamPlay

Physics for IGCSE & O level - Electricity (Section 5 - No. 20)

If a lightbulb uses 100J of energy every second, what is its power?

100 Watts

100 Amperes

100 Volts

100 Ohms

Explanation

Power is energy per second, so 100J/s = 100W.

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