Electronic Principles
At cut off, the Q point is at

lower end of the load line
upper end of the load line
middle of the load line
infinity
None of these

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Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

None of these
The current in an ac circuit flows in two directions at the same time
The current in an ac circuit flows in one direction, but changes value periodically
The current in an ac circuit changes direction periodically
The current in an ac circuit flows in one direction at a steady level

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Electronic Principles
The total impedance of a parallel RLC circuit:

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

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