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

electric device
chemical cell
None of these
thermocouple
solar cell

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Electronic Principles
Which one of the following statements is true for the currents in a series RC circuit?

The total current is less than the sum of the currents for the resistance and capacitance
None of these
The total current is equal to the sum of the currents for the resistance and capacitance
The total current is greater than the sum of the currents for the resistance and capacitance
The current always has the same amplitude and phase for every part of the circuit

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Electronic Principles
In a pure inductor:

ac current leads the voltage by 90 degree
ac current and voltage are exactly in phase
ac current is converted to dc voltage
None of these
ac current lags the voltage by 90 degree

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Electronic Principles
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?

None of these
The voltage reverses polarity periodically
The voltage causes current to flow in two directions at the same time
The voltage remains at one polarity and at a steady level
The voltage remains at one polarity but changes value periodically

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