Ohm’s Law for a Magnetic Circuit MCQ

Test your knowledge with important Ohm’s Law for a Magnetic Circuit MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Ohm’s Law for a Magnetic Circuit MCQs at Bissoy

• The equivalent of the current I in magnetic ohm’s law is?
  ক

  Flux

  খ

  Reluctance

  গ

  MMF

  ঘ

  Resistance
• What is MMF?
  ক

  Magnetic Machine Force

  খ

  Magnetomotive Force

  গ

  Magnetic Motion Force

  ঘ

  Magnetomotion Force
• Can we apply Kirchhoff’s law to magnetic circuits?
  ক

  Yes

  খ

  No

  গ

  Depends on the circuit

  ঘ

  Insufficient information provided
• A ring having a cross-sectional area of 500 mm2, a circumference of 400 mm and ϕ=800microWb has a coil of 200 turns wound around it. Relative permeability of ring is 380. Calculate the magnetising current.
  ক

  6.7A

  খ

  7.7A

  গ

  7.6

  ঘ

  6.1A
• A ring having a cross-sectional area of 500 mm2, a circumference of 400 mm and ϕ=800microWb has a coil of 200 turns wound around it. Relative permeability of ring is 380. Calculate the magnetomotive force.
  ক

  1442At

  খ

  1342At

  গ

  1432At

  ঘ

  1344At
• A ring having a cross-sectional area of 500 mm2, a circumference of 400 mm and ϕ=800microWb has a coil of 200 turns wound around it. Relative permeability of ring is 380. Calculate the reluctance.
  ক

  1.68 * 10-4A/Wb

  খ

  1.68 * 104 A/Wb

  গ

  1.68 * 106 A/Wb

  ঘ

  1.68 * 10-6A/Wb
• A ring having a cross-sectional area of 500 mm2, a circumference of 400 mm and ϕ=800microWb has a coil of 200 turns wound around it. Calculate the flux density of the ring.
  ক

  1.6T

  খ

  2.6T

  গ

  3.6T

  ঘ

  4.6T
• Calculate the MMF when the magnetic flux is 5Wb and the reluctance is 3A/Wb.
  ক

  10At

  খ

  10N

  গ

  15N

  ঘ

  15At
• What happens to the MMF when the magnetic flux decreases?
  ক

  Increases

  খ

  Decreases

  গ

  Remains constant

  ঘ

  Becomes zero
• Ohm’s law for magnetic circuits is _________
  ক

  F=ϕS

  খ

  F=ϕ/S

  গ

  F=ϕ2S

  ঘ

  F=ϕ/S2