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?

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The Answer of 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?

An Ideal Transformer with 120 Turns in Its Secondary Supplies