Electronic Principles
The total impedance of a parallel RLC circuit:

always increases 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 decreases as the applied frequency increases
None of these

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Electronic Principles
Which one of the following phrasers best describes flux density?

The opposition to a build-up of magnetic fields
None of these
The force that maintains lines of force
The concentration of lines of magnetic force
The rate of change of the number of lines of magnetic force

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