Transformers as Magnetically Coupled Circuits MCQ

Test your knowledge with important Transformers as Magnetically Coupled Circuits MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Transformers as Magnetically Coupled Circuits MCQs at Bissoy

• Total cross-sectional area of earthing conductor depends on _____________
  ক

  Minimum fault current

  খ

  Maximum fault current

  গ

  System output voltage

  ঘ

  System input voltage
• What is the coupling factor if self-inductances and mutual inductance are 5.096 H, 0.05098 H and 0.5096 H respectively?
  ক

  1

  খ

  1.499

  গ

  1.2

  ঘ

  0.699
• 5. A transformer has turn ratio of a = 10. The primary on application of 200 V draws 4 A with secondary open circuited which is found to have a voltage of 1950 V. Then, M is equal to ______________
  ক

  1.9 H

  খ

  1.55 H

  গ

  9 H

  ঘ

  2.59 H
• A transformer has turn ratio of a = 10. The primary on application of 200 V draws 4 A with secondary open circuited which is found to have a voltage of 1950 V. Then, L1 is equal to ______________
  ক

  0.19 H

  খ

  0.159 H

  গ

  0.9 H

  ঘ

  0.259 H
• Which of the following ratio is equal to N1/N2?
  ক

  L1/L2

  খ

  L2/L1

  গ

  √ (L1/L2)

  ঘ

  √ (L2/L1)
• Core magnetizing current is __________________
  ক

  i1-i2/a

  খ

  i1+i2/a

  গ

  i1/a-i2/a

  ঘ

  i1/a+i2/a
• Considering transformer as a magnetically coupled circuit, the voltage at the secondary of the transformer is _________________
  ক

  R2i2 + L2*di2/dt – M*di1/dt

  খ

  R2i2 + L2*di2/dt + M*di1/dt

  গ

  -R2i2 + L2*di2/dt – M*di1/dt

  ঘ

  -R2i2 – L2*di2/dt + M*di1/dt
• Considering transformer as a magnetically coupled circuit, the voltage at the primary of the transformer is _________________
  ক

  R1i1 + L1*di1/dt – M*di2/dt

  খ

  R1i1 + L1*di1/dt + M*di2/dt

  গ

  R1i1 – L1*di1/dt + M*di2/dt

  ঘ

  R1i1 – L1*di1/dt – M*di2/dt