Electronic Principles
At cut off, the Q point is at

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

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

The current in an ac circuit flows in one direction at a steady level
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
None of these
The current in an ac circuit changes direction periodically

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