Electronic Principles
A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current?

300 mA
7.8 mA
200 mA
None of these
208 mA

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Electronic Principles
The total inductance of a series inductor circuit is:

None of these
less than the value of the smallest inductor
equal to the sum of the individual inductive-reactance values
equal to the sum of the individual inductance values
equal to the source voltage divided by total current

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