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28 December, 13:47

8 dB correspond to a power ratio of ... ?

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  1. 28 December, 16:25
    0
    6.31

    Explanation:

    Power ratio (in db) = 10 * log [P (out) / P (in) ]

    Here, P (in) and P (out) correspond to input and output power in Watts respectively.

    This implies, 8 db = 10 * log [P (out) / P (in) ]

    Rearranging, log [P (out) / P (in) ] = (8/10)

    Or, P (out) / P (in) = 10 ^ 0.8 = 6.31

    But, P (out) / P (in) corresponds to the power ratio of output and input power.

    So the required power ratio corresponds to 6.31
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