Electronic Principles
For a pure capacitor:

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

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Electronic Principles
Which one of the following phrases best describes residual magnetism?

Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
The amount of magnetic flux that is not confined to the core material of an electromagnet
The circular magnetic field that surrounds a conductor carrying a current
The force of attraction between the poles of a permanent and temporary magnetic field
None of these

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

The total voltage of a series circuit is equal to the total current divided by the total resistance
The total voltage is equal to the sum of the individual voltages in a series circuit
None of these
The total voltage in a series circuit is always less than the value of the smallest voltage
The total voltage in a series circuit is equal to the average value of the individual voltages

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