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MCQs

Total Questions : 90 | Page 5 of 9 pages
Question 41. In a parallel RC circuit, there is 100 mA through the resistive branch and 100 mA through the capacitive branch. The total rms current is
  1.    200 mA
  2.    100 mA
  3.    282 mA
  4.    141 mA
 Discuss Question
Answer: Option D. -> 141 mA
Question 42. In a lag network, the output voltage lags the input voltage in phase.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 43. In the complex plane, the number 14 – j5 is located in the
  1.    third quadrant
  2.    fourth quadrant
  3.    first quadrant
  4.    second quadrant
 Discuss Question
Answer: Option B. -> fourth quadrant
Question 44. A 470 resistor and a 0.2 F capacitor are in parallel across a 2.5 kHz ac source. The admittance, Y, in rectangular form, is
  1.    318.3
  2.    212
  3.    3.14 mS + j2.12 mS
  4.    2.12 mS + j3.14 mS
 Discuss Question
Answer: Option D. -> 2.12 mS + j3.14 mS
Question 45. A positive angle of 30° is equivalent to a negative angle of
  1.    –30°
  2.    –60°
  3.    –330°
  4.    –180°
 Discuss Question
Answer: Option C. -> –330°
Question 46. Point +4 on the complex plane is
  1.    4 units below the origin on the j axis
  2.    4 units right of the origin on the real axis
  3.    4 units left of the origin on the real axis
  4.    4 units above the origin on the j axis
 Discuss Question
Answer: Option B. -> 4 units right of the origin on the real axis
Question 47. In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is
  1.    19.2 V
  2.    1.9 V
  3.    27 V
  4.    3 V
 Discuss Question
Answer: Option A. -> 19.2 V
Question 48. A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is
  1.    18 kHz
  2.    12 kHz
  3.    0 Hz
  4.    6 kHz
 Discuss Question
Answer: Option D. -> 6 kHz
Question 49. A 47Ω resistor and a capacitor with a capacitive reactance of 120 are in series across an ac source. What is the circuit impedance, Z?
  1.    73Ω
  2.    167Ω
  3.    129Ω
  4.    12.9Ω
 Discuss Question
Answer: Option C. -> 129Ω
Question 50. In the complex plane, the number 4 + j3 is located in the
  1.    second quadrant
  2.    fourth quadrant
  3.    third quadrant
  4.    first quadrant
 Discuss Question
Answer: Option D. -> first quadrant

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