A bulb marked 240V 40W is used for 30 minutes C... - WAEC Physics 2007 Question
A bulb marked 240V, 40W is used for 30 minutes. Calculate the heat generated
A
320J
B
400J
C
10800J
D
72000J
correct option: d
W = P x t
= 40 x 30 x 60
= 72000J
= 40 x 30 x 60
= 72000J
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