(a)The primary of a step-up transformer connected to a 120 V source has 200 turns.  If the output is 480 V, how many turns does the secondary have? (b)The primary of a step-down transformer connected to a 240 V source has 1500 turns.  The secondary has 200 turns.   What is the output voltage of this transformer? (c)A laptop computer requires 24 volts to operate properly.  A transformer with 600 turns in the primary needs to have how many turns in the secondary to operate the computer from a 120 V source?

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