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

Solar energy
None of these
Light energy
Chemical energy
Mechanical energy

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

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

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Electronic Principles
In a pure inductor:

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

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

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 reverses polarity periodically
None of these
The voltage remains at one polarity but changes value periodically

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