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Physics

CAIE2023

For Examiner’s Use (c) Calculate the length of the wire pair for the signal power to be reduced to the level of the noise power. length = km [2] © UCLES 2005 9702/04/SPECIMEN PAPER [Turn over PPPMMMTTT For

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Physics

CAIE2016

5 µW and there is a constant noise power in the wire pair of 0.035 µW. (a) Explain what is meant by noise. ................................................................................................................................................... .............................................................................................................................................. [1] (b) Calculate the power output of the amplifi er. power output = ..................................................... W [3] (c) Calculate the length of the wire pair for the signal power to be reduced to the level of the noise power. length = .................................................... km [2] [Total: 6] © UCLES 2014 9702/04/SP/16 PPMMTT

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