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A Bulb Marked 240V, 40W Is Used For 30 Minutes. Calculate The Heat Generated? - Erudites Academy
Physics WAEC

A bulb marked 240V, 40W is used for 30 minutes. Calculate the heat generated?

A. 320J
B. 400J
C. 10800J
D. 72000J

Correct Answer: Option D

D. 72000J

Explanation

W = P x t

= 40 x 30 x 60

= 72000J

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