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Discussion

The power input and output in a device are 3650 W and 3385 W with each reading in doubt by ± 10 W. The percentage uncertainty in losses is

  • A.± 7.55%
  • B.± 3.77%
  • C.± 11.32%
  • D.± 15.09%

Answer: A

Losses = 3650 - 3385 = 265 W uncertainty = ± 20 W.

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