Short Answer
An ideal transformer with 120 turns in its secondary supplies 12 V at 220 mA to a toy
train. The primary is connected across a 120-V wall outlet.
(a) How many turns are in the primary?
(b) What is the primary current?
(c) What power is delivered by the wall outlet?
Correct Answer:

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(a) 1200 (...View Answer
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