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

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

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Electronic Principles
Which one of the following phrases most accurately describes a purely capacitive circuit?

Resistances provide the only opposition to current flow
Combinations of resistance and capacitive reactance provide any opposition to current flow
None of these
Capacitive reactance provides the only opposition to current flow
The ac voltage leads the current by 90 degree

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

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

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