WAEC - Physics (2007 - No. 39) | ExamPlay

WAEC - Physics (2007 - No. 39)

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

320J

400J

10800J

72000J

Explanation

W = P x t

= 40 x 30 x 60

= 72000J

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