Electronic Principles(Computer Science ) Questions and Answers
Question 1. Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?
R = E2/P
P = PR
P = E2/R
I = P/E
None of the above
Explanation:-
Answer: Option A. -> R = E2/P
Question 2. The total capacitive reactance of a parallel capacitor circuit is:
equal to the sum of the individual capacitive-reactance values
equal to the sum of the individual capacitance values
equal to the source voltage divided by total current
less than the capacitance value of the smallest capacitor
None of the above
Explanation:-
Answer: Option C. -> equal to the source voltage divided by total current
Question 3. Thevenin theorem replaces a complicated circuit facing a load by an
Ideal voltage source and parallel resistor
Ideal current source and parallel resistor
Ideal voltage source and series resistor
Ideal current source and series resistor
None of the above
Explanation:-
Answer: Option C. -> Ideal voltage source and series resistor
Question 4. What kind of device is a diode?
Bilateral
Linear
Nonlinear
Unipolar
None of the above
Explanation:-
Answer: Option C. -> Nonlinear
Question 5. Which one of the following statements applies to common, non-rechargeable flashlight batteries?
Common flashlight batteries are secondary wet-cell batteries
Common flashlight batteries are primary wet-cell batteries
Common flashlight batteries are primary dry-cell batteries
Common flashlight batteries are secondary dry-cell batteries
None of the above
Explanation:-
Answer: Option C. -> Common flashlight batteries are primary dry-cell batteries
Question 6. The total inductive reactance of a parallel inductor circuit is:
equal to the sum of the individual inductive-reactance values
equal to the sum of the individual inductance values
equal to the source voltage divided by total current
less than the inductance value of the smallest inductor
None of the above
Explanation:-
Answer: Option C. -> equal to the source voltage divided by total current
Question 7. A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage?
12 V
18 V
24 V
30 V
None of the above
Explanation:-
Answer: Option C. -> 24 V
Question 8. Which one of the following statements regarding ac circuits is correct?
Current and voltage are in phase through an inductor
Current leads the voltage through an inductor
Current lags the voltage through an inductor
All of the above
None of the above
Explanation:-
Answer: Option C. -> Current lags the voltage through an inductor
Question 9. Norton's theorem replaces a complicated circuit facing a load by an
Ideal voltage source and parallel resistor
Ideal current source and parallel resistor
Ideal voltage source and series resistor
Ideal current source and series resistor
None of the above
Explanation:-
Answer: Option B. -> Ideal current source and parallel resistor
Question 10. Doubling the operating frequency of a capacitive circuit:
doubles the amount of a capacitive reactance
has no effect on the capacitive reactance
cuts the capacitive reactance in half
multiplies the capacitive reactance by 6.28
None of the above
Explanation:-
Answer: Option C. -> cuts the capacitive reactance in half