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MCQs

Total Questions : 149 | Page 1 of 15 pages
Question 1. The winding resistance of a coil can be increased by
  1.    Increasing the number of turns
  2.    Using a thinner wire
  3.    Changing the core material
  4.    Increasing the number of turns or using thinner wire
 Discuss Question
Answer: Option D. -> Increasing the number of turns or using thinner wire
Question 2. An 18 V power supply is connected across a coil with a winding resistance of 180 Ω. Current flow in the coil is
  1.    1 mA
  2.    10 mA
  3.    100 mA
  4.    1 A
 Discuss Question
Answer: Option C. -> 100 mA
Question 3. An inductor, a 1 kΩ resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
  1.    0 V
  2.    6 V
  3.    12 V
  4.    4 V
 Discuss Question
Answer: Option B. -> 6 V
Question 4. Five inductors are connected in series. The lowest value is 8 µH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is
  1.    8 H
  2.    32 µH
  3.    64 µH
  4.    248 µH
 Discuss Question
Answer: Option D. -> 248 µH
Question 5. A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
  1.    55 mH
  2.    Less than 0.2 mH
  3.    Less than 5.5 mH
  4.    5.5 mH
 Discuss Question
Answer: Option D. -> 5.5 mH
Question 6. A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is
  1.    9.9 mH
  2.    Greater than 5 mH
  3.    9.9 mH or greater than 5 mH
  4.    Less than 0.6 mH
 Discuss Question
Answer: Option D. -> Less than 0.6 mH
Question 7. An inductance of 0.08 µH is larger than
  1.    0.0000008 H
  2.    0.000000008 H
  3.    0.000008 H
  4.    0.00008 mH
 Discuss Question
Answer: Option B. -> 0.000000008 H
Question 8. Three 15 mH inductors are in series. The total inductance is
  1.    15 mH
  2.    30 mH
  3.    45 mH
  4.    5 mH
 Discuss Question
Answer: Option C. -> 45 mH
Question 9. The voltage across a coil when di/dt = 20 mA/µs and L = 8 µH is
  1.    16 mV
  2.    160 mV
  3.    1.6 mV
  4.    2.5 mV
 Discuss Question
Answer: Option B. -> 160 mV
Question 10. An inductance of 0.43 mH is smaller than
  1.    43 µH
  2.    430 µH
  3.    0.05 H
  4.    0.00043 H
 Discuss Question
Answer: Option C. -> 0.05 H

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