Electronic Principles
The saturation point is approximately the same as

cutoff point
upper end of the load line
lower end of the load line
None of these
infinity

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Electronic Principles
Doubling the operating frequency of a purely inductive circuit:

increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit
None of these
has no effect on the current through the inductors
cuts the current through the inductors one-half
doubles the amount of current through the inductors

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