Computer Science - Electronic Principles

16. 

The total inductive reactance of a parallel inductor circuit is:

A. equal to the sum of the individual inductive-reactance values
B. equal to the sum of the individual inductance values
C. equal to the source voltage divided by total current
D. less than the inductance value of the smallest inductor
E. None of the above

Answer: Option C

Explanation:

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17. 

A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage?

A. 12 V
B. 18 V
C. 24 V
D. 30 V
E. None of the above

Answer: Option C

Explanation:

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18. 

Norton's theorem replaces a complicated circuit facing a load by an

A. Ideal voltage source and parallel resistor
B. Ideal current source and parallel resistor
C. Ideal voltage source and series resistor
D. Ideal current source and series resistor
E. None of the above

Answer: Option B

Explanation:

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19. 

Which one of the following statements regarding ac circuits is correct?

A. Current and voltage are in phase through an inductor
B. Current leads the voltage through an inductor
C. Current lags the voltage through an inductor
D. All of the above
E. None of the above

Answer: Option C

Explanation:

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20. 

Doubling the operating frequency of a capacitive circuit:

A. doubles the amount of a capacitive reactance
B. has no effect on the capacitive reactance
C. cuts the capacitive reactance in half
D. multiplies the capacitive reactance by 6.28
E. None of the above

Answer: Option C

Explanation:

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