Electronic Principles
What form of energy is used for creating static electricity?

Mechanical energy
Light energy
Solar energy
None of these
Chemical energy

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

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

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