A bulb marked 240V, 40W is used for 30 minutes. Calculate the heat generated
PHYSICS
WAEC 2007
A bulb marked 240V, 40W is used for 30 minutes. Calculate the heat generated
- A. 320J
- B. 400J
- C. 10800J
- D. 72000J
Correct Answer: D. 72000J
Explanation
W = P x t = 40 x 30 x 60 = 72000J
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