The 200- turn primary coil of a step‑down transformer is connected to an AC line that...
The 200- turn primary coil of a step‑down transformer is connected to an AC line that is 120.0 V (rms). The secondary coil is to supply 10.0 A (rms) at 11.4 V (rms). Assuming no power loss in the transformer, what is the number of turns ?s in the secondary coil?
?s= turns
What is the rms current ?p,rms in the primary coil?
Homework Answers
Given that
N1 = 200
V1 = 120 V
I2 = 10 A
V2 = 11.4 V
Now we know that
N1/N2 = V1/V2 = I2/I1
a)
200/N2 = 120/11.4
N2 = 200*11.4/120 = 19 turns
b) 120/11.4 = 10/I1
I1 = 0.95 amp
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