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

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
Explanation

W = P x t
= 40 x 30 x 60
= 72000J

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