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

Mechanical energy
Solar energy
Light energy
None of these
Chemical energy

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Electronic Principles
The rms value of a sine waveform is:

equal to 1.41 times the peak amplitude
the time required to complete one full cycle
None of these
the number of cycles completed in one second
equal to 0.707 times the peak amplitude

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Electronic Principles
For a pure capacitor:

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

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