Electronic Principles
Doubling the number of turns of wire in an inductor:

reduces the value of inductance by one-half
None of these
reduces the value of inductance by one-fourth
multiplies the value of inductance by four
multiplies the value of inductance by two

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Electronic Principles
In a pure inductor:

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

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