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MCQs

Total Questions : 33 | Page 3 of 4 pages
Question 21. The Norton equivalent current is
  1.    The current through the load
  2.    The open-current from the source
  3.    The short circuit current
  4.    None of the above
 Discuss Question
Answer: Option C. -> The short circuit current
Question 22. Norton's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent voltage source in series with an equivalent impedance.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 23. Thevenin's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent current source in parallel with an equivalent impedance.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 24. If two currents are in the same direction at any instant of time in a given branch of a circuit, the net current at that instant
  1.    Is zero
  2.    Is the sum of the two currents
  3.    Is the difference between the two currents
  4.    Cannot be determined
 Discuss Question
Answer: Option B. -> Is the sum of the two currents
Question 25. The Thevenin equivalent voltage is
  1.    Equal to the source voltage
  2.    The same as the load voltage
  3.    The open circuit voltage
  4.    None of the above
 Discuss Question
Answer: Option C. -> The open circuit voltage
Question 26. Norton's theorem gives
  1.    An equivalent current source in parallel with an equivalent impedance
  2.    An equivalent current source in series with an equivalent impedance
  3.    An equivalent voltage source in parallel with an equivalent impedance
  4.    An equivalent voltage source in series with an equivalent impedance
 Discuss Question
Answer: Option A. -> An equivalent current source in parallel with an equivalent impedance
Question 27. Referring to the given circuit, what is ZTH if R1 is changed to 220 Ω?
  1.    225 ∠12.1° Ω
  2.    225 ∠77.9° Ω
  3.    46 ∠77.9° Ω
  4.    46 ∠12.1° Ω
 Discuss Question
Answer: Option C. -> 46 ∠77.9° Ω
Question 28. Referring to the given circuit, determine ZTH as seen by RL.
  1.    1444 ∠-48.5° Ω
  2.    4176 ∠-73.3° Ω
  3.    956 ∠-48.5° Ω
  4.    1444 ∠-73.3° Ω
 Discuss Question
Answer: Option A. -> 1444 ∠-48.5° Ω
Question 29. Determine VTH if R1 is changed to 3.3 kΩ.
  1.    0.574 ∠16.7° V
  2.    4.63 ∠16.7° V
  3.    4.63 ∠39.5° V
  4.    0.463 ∠39.5° V
 Discuss Question
Answer: Option C. -> 4.63 ∠39.5° V
Question 30. Referring to the given figure, determine ZTH as seen by RL if R1 is changed to 3.3 kΩ.
  1.    1488 ∠-70.7° Ω
  2.    3859 ∠-31.2° Ω
  3.    5180 ∠-50.5° Ω
  4.    1828 ∠-50.2° Ω
 Discuss Question
Answer: Option D. -> 1828 ∠-50.2° Ω

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