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MCQs

Total Questions : 327 | Page 32 of 33 pages
Question 311. Which of the following coil will have large resonant frequency __________?
  1.    A coil with large resistance
  2.    A coil with low resistance
  3.    A coil with large distributed capacitance
  4.    A coil with low distributed capacitance
 Discuss Question
Answer: Option C. -> A coil with large distributed capacitance
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 312. If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be________?
  1.    0.001 s
  2.    0.1 s
  3.    10 s
  4.    100 s
 Discuss Question
Answer: Option B. -> 0.1 s
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 313. In a R-L-C circuit_________?
  1.    power is consumed in resistance and is equal to I R
  2.    exchange of power takes place between inductor and supply line
  3.    exchange of power takes place between capacitor and supply line
  4.    exchange of power does not take place between resistance and the supply line
  5.    all above are correct
 Discuss Question
Answer: Option E. -> all above are correct
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 314. Power factor of electric bulb is__________?
  1.    zero
  2.    lagging
  3.    leading
  4.    unity
 Discuss Question
Answer: Option D. -> unity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 315. The safest value of current the human body can carry for more than 3 second is_________?
  1.    4 mA
  2.    9 mA
  3.    15 mA
  4.    25 mA
 Discuss Question
Answer: Option B. -> 9 mA
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 316. Time constant of a circuit is the time in seconds taken after the application of voltage to each___________?
  1.    25% of maximum value
  2.    50% of maximum value
  3.    63% of maximum value
  4.    90% of the maximum value
 Discuss Question
Answer: Option C. -> 63% of maximum value
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 317. Which of the following circuit component opposes the change in the circuit voltage ?
  1.    Inductance
  2.    Capacitance
  3.    Conductance
  4.    Resistance
 Discuss Question
Answer: Option B. -> Capacitance
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 318. In a purely inductive circuit__________?
  1.    actual power is zero
  2.    reactive power is zero
  3.    apparent power is zero
  4.    none of above is zero
 Discuss Question
Answer: Option A. -> actual power is zero
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 319. Time constant of an inductive circuit_________?
  1.    increases with increase of inductance and decrease of resistance
  2.    increases with the increase of inductance and the increase of resistance
  3.    increases with the decrease of inductance and decrease of resistance
  4.    increases with decrease of inductance and increase of resistance
 Discuss Question
Answer: Option A. -> increases with increase of inductance and decrease of resistance
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 320. Magnitude of current at resonance in R-L-C circuit________?
  1.    depends upon the magnitude of R
  2.    depends upon the magnitude of L
  3.    depends upon the magnitude of C
  4.    depends upon the magnitude of R, Land C
 Discuss Question
Answer: Option A. -> depends upon the magnitude of R
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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