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

piezoelectric devices
solar cell
chemical cell
thermocouple
None of these

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Electronic Principles
The total inductive reactance of a parallel inductor circuit is:

None of these
equal to the source voltage divided by total current
equal to the sum of the individual inductive-reactance values
less than the inductance value of the smallest inductor
equal to the sum of the individual inductance values

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Electronic Principles
Which one of the following statements is true for the voltage in a parallel RL circuit?

The total voltages is less than the sum of the voltages across the resistance and inductance
The total voltage lags the total current by less than 90
The total voltage is equal to the sum of the voltages across the resistance and inductance
None of these
The voltage always has the same amplitude and phase for every part of the circuit

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Electronic Principles
Which one of the following phrases most accurately describes a purely inductive circuit?

Combinations of resistance and inductive reactance provide any opposition to current flow
Inductive reactance provides the only opposition to current flow
The ac voltage lags the current by 90 degree
Resistances provide the only opposition to current flow
None of these

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