Electronic Principles
The total impedance of a parallel RLC circuit:

always decreases as the applied frequency increases
is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
is maximum at the resonant frequency
always increases as the applied frequency increases
None of these

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

Combinations of resistance and inductive reactance provide any opposition to current flow
Inductive reactance provides the only opposition to current flow
Resistances provide the only opposition to current flow
None of these
The ac voltage lags the current by 90 degree

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