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

chemical cell
thermocouple
None of these
solar cell
piezoelectric devices

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

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

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