Magnitude of the Generated or Induced EMF MCQ

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• Voltage induced in secondary coil of transformer is given by__________________
  ক

  NP*VP/NS

  খ

  NS*VP/NP

  গ

  (NP/VP)*NS

  ঘ

  NP/(VP*NS)
• What is the principle of the transformer?
  ক

  Gauss law

  খ

  Coulomb’s law

  গ

  Electromagnetic induction

  ঘ

  Ampere’s law
• North pole induces __________
  ক

  Clockwise current

  খ

  Anti-clockwise current

  গ

  Zero current

  ঘ

  Infinite current
• According to ____________________ induced emf oppose the cause due to which they are produced.
  ক

  Newton’s law

  খ

  Lenz law

  গ

  Faraday’s law

  ঘ

  Coulomb’s law
• The emf induced in a coil having N turns is?
  ক

  e=ϕ/t

  খ

  e=N*ϕ/t

  গ

  e=N*ϕ*t

  ঘ

  e=N2*ϕ*t
• According to _________________ induced emf is equal to rate of change of magnetic flux.
  ক

  Newton’s law

  খ

  Lenz law

  গ

  Faraday’s law

  ঘ

  Coulomb’s law
• Which, among the following, is the formula for induced emf?
  ক

  e=dϕ /dt

  খ

  e=dt/dϕ

  গ

  e=t*ϕ

  ঘ

  e=t2ϕ