Coupling Coefficient MCQ

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• Find the value of x if the Mutual inductance is 20H, the inductance of coil 1 is xH and the inductance of coil 2 is 8H. The coupling coefficient is 5.
  ক

  2H

  খ

  4H

  গ

  6H

  ঘ

  8H
• Find the value of x if the Mutual inductance is x H, the inductance of coil 1 is 2H and the inductance of coil 2 is 8H. The coupling coefficient is 5.
  ক

  10H

  খ

  20H

  গ

  16H

  ঘ

  15H
• Find the coupling coefficient if the Mutual inductance is 20H, the inductance of coil 1 is 2H and the inductance of coil 2 is 8H.
  ক

  5

  খ

  20

  গ

  2

  ঘ

  8
• What is the SI unit of coupling coefficient?
  ক

  H

  খ

  H-1

  গ

  No unit

  ঘ

  H2
• What happens to the coupling coefficient when the flux linkage of coil 1 and coil 2 increases?
  ক

  Increases

  খ

  Decreases

  গ

  Remains the same

  ঘ

  Becomes zero
• Which, among the following, is the correct formula to find the coupling coefficient?
  ক

  k=M/sqrt(L1L2)

  খ

  k=M/sqrt(L12)

  গ

  k=M/sqrt(L22)

  ঘ

  k=M/(L1L2)
• Mutual inductance between two coupled coils depend on?
  ক

  Amount of flux linkage

  খ

  Rate of change of flux linkage

  গ

  Rate of change of current

  ঘ

  Flux density
• Can the coupling coefficient practically ever be equal to 1?
  ক

  Yes

  খ

  No

  গ

  Depends on the current in coil 1

  ঘ

  Depends on the current in coil 2
• What is the coupling coefficient when there is ideal coupling?
  ক

  0

  খ

  100

  গ

  1

  ঘ

  Insufficient information provided
• What is the coupling coefficient when all the flux of coil 1 links with coil 2?
  ক

  0

  খ

  100

  গ

  1

  ঘ

  Insufficient information provided