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

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

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

The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is less than the sum of the voltages across the resistance and inductance
The total voltages is equal to the sum of the voltages across the resistance and inductance
None of these
The total voltage lags the total current by less than 90

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Electronic Principles
For a pure capacitor:

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

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

The total current in a parallel circuit is always less than the smallest amount of current
The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance
None of these
The same current always flows through every part of a parallel circuit

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Electronic Principles
Doubling the operating frequency of a purely inductive circuit:

has no effect on the current through the inductors
increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit
None of these
doubles the amount of current through the inductors
cuts the current through the inductors one-half

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Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

None of these
Like magnetic poles attract, while unlike poles repel
Current flowing through a conductor generates a magnetic field
Like magnetic poles repel, while unlike poles attract
Current is induced in a conductor that is moving through a magnetic field

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