SOLUTION: d. The step-down transformer in a local neighborhood reduces the voltage from a 7200 V line to 120 V at the house. Using the relationships between electrical quantities in a trans

Question 1120423: d. The step-down transformer in a local neighborhood reduces the voltage from a 7200 V line to 120 V at the house. Using the relationships between electrical quantities in a transformer, answer the following.

1.
i. If there are 125 loops in the secondary coil, how many are there in the primary coil?
ii. What current does the transformer draw from the line if the current in the secondary coil is 36 A?
iii. What are the power input and output?

Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
7200/120=60
60*125=7500 primary turns
36/60=0.6 amps
w=ia
w=7200*0.6=4320 primary
120*36=4320 secondary
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