Question the battery charger for an mp3 player contains a, Ask an Expert

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Question: The battery charger for an MP3 player contains a step-down transformer with a turn ratio of 1:40, so that the voltage of 120 V available at a wall socket can be used to charge the battery pack or operate the player.

Part A: What voltage does the secondary coil of the transformer provide?

I need help to find what voltage the secondary coil of the transformer provides.

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