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A refrigerator consumes an average 35W power to operate between temperature -10°C to 25°C. If there is no loss of energy then how much average heat per second does it transfer?

Option 1 -

350 J/s

Option 2 -

298 J/s

Option 3 -

35 J/s

Option 4 -

263 J/s

0 75 Views | Posted 3 months ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    3 months ago
    Correct Option - 4


    Detailed Solution:

    Q H Q L = T H T L

    ⇒ Q L = T L T H − T L × ( Q H − Q L )

    ⇒ d Q L d t = T L T H − T L . d ( Q H − Q L ) d t

    = 2 7 3 − 1 0 2 5 − ( − 1 0 ) × 3 5

    = 2 6 3 J s − 1

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