Electronic Principles
For a pure capacitor:

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

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

The total current is less than the sum of the currents for the resistance and capacitance
The total current is equal to 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
None of these
The total current. is greater than the sum of the currents for the resistance and capacitance

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Electronic Principles
Which one of the following phrasers best describes flux density?

The opposition to a build-up of magnetic fields
The rate of change of the number of lines of magnetic force
None of these
The force that maintains lines of force
The concentration of lines of magnetic force

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