Sail E0 Webinar

MCQs

Total Questions : 90 | Page 2 of 9 pages
Question 11. In a series RC circuit, when the frequency and the resistance are halved, the impedance
  1.    Doubles
  2.    Is halved
  3.    Is reduced to one-fourth
  4.    Cannot be determined without values
 Discuss Question
Answer: Option D. -> Cannot be determined without values
Question 12. A 2 kΩ resistor is in series with a 0.015 µF capacitor across a 15 kHz ac source. What is the magnitude of the total impedance and the phase angle?
  1.    73.4 Ω and ∠ = -19.5°
  2.    707 Ω and ∠ = -19.5°
  3.    2121 Ω and ∠ = -19.5°
  4.    734 Ω and ∠ = -38.9°
 Discuss Question
Answer: Option C. -> 2121 Ω and ∠ = -19.5°
Question 13. The impedance of a series RC circuit varies directly with frequency.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 14. What is the angular difference between +j4 and -j4?
  1.    30°
  2.    90°
  3.    180°
  4.    270°
 Discuss Question
Answer: Option C. -> 180°
Question 15. When the frequency of the voltage applied to a series RC circuit is decreased, the impedance
  1.    Increases
  2.    Decreases
  3.    Remains the same
  4.    Doubles
 Discuss Question
Answer: Option A. -> Increases
Question 16. The circuit phase angle is the angle between the total current and the applied (source) voltage.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 17. A capacitor with 150 Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is
  1.    Z = 150
  2.    Z = 150 ∠90°O
  3.    Z = 150 ∠-90°O
  4.    Z = 150 ∠180°O
 Discuss Question
Answer: Option C. -> Z = 150 ∠-90°O
Question 18. A 12 kΩ resistor is in series with a 0.02 µF capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as I = 0.3 ∠0° mA, what is the source voltage expressed in polar form?
  1.    45.6 V
  2.    411.3 V
  3.    0.411 V
  4.    4.11 V
 Discuss Question
Answer: Option D. -> 4.11 V
Question 19. An imaginary number is one that exists only in the mind of the mathematician.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 20. For a certain load, the true power is 150 W and the reactive power is 125 VAR. The apparent power is
  1.    19.52 W
  2.    195.2 W
  3.    275 W
  4.    25 W
 Discuss Question
Answer: Option B. -> 195.2 W

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Tabulation - Test Paper 2 Data Interpretation Reasoning & DI
Test Paper 1 Direction Sense Test Reasoning & DI
ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GFM Combined 1 Free Revision Test SAIL JO E-0