Electronic Principles
A device that converts mechanical pressure to electrical energy is called a:

None of these
piezoelectric device
nicad cell
photodiode
solar cell

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

None of these
doubles the amount of current through the inductors
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

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