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12 February, 07:49

The battery charger for an mp3 player contains a step-down transformer with a turns ratio of 1:24, so that the voltage of 120 v available at a wall socket can be used to charge the battery pack or operate the player. what voltage does the secondary coil of the transformer provide? (no response) seenkey 5 v

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  1. 12 February, 09:17
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    Considering that we are talking about a stepdown transformer, and a turn ration of 1:24

    Then

    Vsecondary coil = 120 V / 24 = 5V

    (But lets remember that the power must be conserved in the transformer, so the voltage is 24 times less, but the current is 24 times higher)

    It provides 5 volts to operate the player or charge the batteries
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