2. The ac adapter for a laptop computer contains a transformer. The input of the adapter...
2. The ac adapter for a laptop computer contains a transformer. The input of the adapter is the 120 volts from the ac wall outlet. The output from the transformer is 20 volts. What is the turns ratio of the transformer?
a. 100
b. This cannot be determined without knowing how many turns one of the coils in the transformer has.
c. 0.17
d. 6
Homework Answers
Input voltage to the transformer = V1 = 120 V
Output voltage from the transformer = V2 = 20 V
Turns ratio of the transformer = n
Turns ratio of a transformer is equal to the ratio of the number of turns in the primary coil to the secondary coil which is also equal to the ratio of the primary voltage to the secondary voltage.
n = 6
Turns ratio of the transformer = 6
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