17th
Apr
Electromagnetic Induction MCQ

Electromagnetic Induction MCQ

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  • 17th Apr, 2021
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Electromagnetic Induction MCQ Test

Following are mostly asked Electromagnetic induction MCQ test that are designed for professionals like you to crack you interviews. You can take this Electromagnetic induction online test before appearing to you real interview. This Electromagnetic induction quiz there are around 30+ multiple choice questions on Electromagnetic induction with four options.

1) The magnitude of the induced e.m.f. in a conductor depends on the

  • A. Amount of flux cut
  • B. Amount of flux linkages
  • C. Rate of change of flux-linkages
  • D. Flux density of the magnetic field

2) A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be

  • A. 50 V
  • B. 25 V
  • C. 15 V
  • D. 10 V

3) Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is

  • A. 5 H
  • B. 10 H
  • C. 5 mH
  • D. 10 mH

4) The coefficient of coupling between two air core coils depends on

  • A. Mutual inductance between two coils only
  • B. Self-inductance of two coils only
  • C. Mutual inductance and self inductance of two coils
  • D. None of the above

5) A crack in the magnetic path of an inductor will result in

  • A. Zero inductance
  • B. Reduced inductance
  • C. Increased inductance
  • D. Unchanged inductance

6) Which of the following is not a unit of inductance?

  • A. Volt second per ampere
  • B. Henry
  • C. Coulomb/volt ampere
  • D. All of the above

7) Air-core coils are practically free from

  • A. Eddy current losses
  • B. Hysteresis losses
  • C. Both (A) and (B)
  • D. None of the above

8) The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be

  • A. 48 mH
  • B. 24 mH
  • C. 3 mH
  • D. 12 mH

9) If a negative charge is absent corresponding to Faraday’s experiment of concentric spheres, then where do the flux lines show termination?

  • A. At unity
  • B. At infinity
  • C. At zero
  • D. At radial field

10) During the movement of a charge, potential energy undergoes _________

  • A. Reflection
  • B. Radiation
  • C. Compression
  • D. Expansion

11) The phenomenon of work done while moving a point charge in presence of an electric field is independent of _______

  • A. Path
  • B. Force
  • C. Position
  • D. All of the above

12) Work done becomes zero, if the selected path is located in _______ direction to electric field intensity (E)

  • A. Parallel
  • B. Adjacent
  • C. Opposite
  • D. Perpendicular

13) If the motion of charge (Q) is against the electric field with an additional requirement of external force, then what would be the nature of work done?

  • A. Positive
  • B. Infinity
  • C. Null (zero)
  • D. Negative

14) What does the constant ‘μ’ indicate, while specifying the relation between magnetic flux density (B) and magnetic field intensity (H)?

  • A. Permittivity
  • B. Persistivity
  • C. Permeability
  • D. Permissibility

15) Which conceptual notion introduced by Maxwell, indicates the generation of magnetic field in an empty free space?

  • A. Velocity Vector current
  • B. Acceleration current
  • C. Velocity Vector current
  • D. Displacement current

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