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

The voltage reverses polarity periodically
None of these
The voltage remains at one polarity and at a steady level
The voltage causes current to flow in two directions at the same time
The voltage remains at one polarity but changes value periodically

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Electronic Principles
The dielectric constant of a material is a measure of:

how well the material concentrates electrostatic lines of force
how well the material concentrates magnetic lines of force
None of these
the amount of opposition to the current flow
the amount of voltage it can withstand before breaking down

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