Exercise: Electronic Principles

Questions for: Electronic Principles

A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage?
A:
700 V
B:
707 V
C:
651 V
D:
208 V
Answer: C
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Which one of the following statements most accurately reflects the nature of ac power?
A:
The current in an ac circuit flows in one direction, but changes value periodically
B:
The current in an ac circuit flows in one direction at a steady level
C:
The current in an ac circuit changes direction periodically
D:
The current in an ac circuit flows in two directions at the same time
Answer: C
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What causes the depletion layer?
A:
Doping
B:
Recombination
C:
Barrier potential
D:
Ions
Answer: C
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When operating below its resonant frequency, a parallel RLC circuit has the characteristics of a:
A:
parallel RL circuit
B:
parallel RC circuit
C:
parallel RLC circuit operated above its resonant frequency
D:
purely resistive circuit
Answer: A
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What is the algebraic sum of this series of values:+2, -3, -6,+4?
A:
-6
B:
-3
C:
0
D:
+2
Answer: B
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