Electronic Principles
Which one of the following statements is true?

Power dissipation of a pure capacitor increases with operating frequency
Power dissipation of a pure capacitor decreases with operating frequency
There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency
None of these
All of these

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Electronic Principles
The core of an electromagnet is said to be in saturation when:

None of these
frequent changes in the direction of current through the coil causes heating effects in the core material
the core is permitted to move freely within the coil
changing the polarity of the current in the coil changes the polarity of the magnetic field around the core
an increase in current through the coil causes no further increase in the mmf

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