Electronic Principles
In a pure inductor:

ac current and voltage are exactly in phase
ac current is converted to dc voltage
ac current lags the voltage by 90 degree
None of these
ac current leads the voltage by 90 degree

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

less than the value of the smallest inductor
None of these
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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