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  • A light bulb uses 500 J of energy in 5 seconds. What is i...
Multiple choice

A light bulb uses 500 J of energy in 5 seconds. What is its power? (Remember: P = E ÷ t)

  1. 50 watts

  2. 500 watts

  3. 10 watts

  4. 100 watts

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Using the formula P = E/t, 500 J / 5 s = 100 Watts.

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