☰ Electromagnetic Field Theory (Electrical Engineering) - MCQs

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Q25.

Magnetic flux density emerging out of a closed surface is

  • A. infinite
  • B. zero
  • C. depend upon the magnetic movement inside the closed surface
  • D. none of the above

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Q26.

An ideal voltage source will charge an ideal capacitor

  • A. in infinite time
  • B. exponentially
  • C. instantaneously
  • D. none of the above

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Q27.

In a parallel plate capacitor, a dielectric slab is introduced. Then the

  • A. pd between the plates will decrease
  • B. electric intensity will decrease
  • C. capacitance will increase
  • D. all of the above

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Q28.

A medium behaves like dielectric when the

  • A. displacement current is just equal to the conduction current
  • B. displacement current is less than the conduction current
  • C. displacement current is much greater than the conduction current
  • D. displacement current is almost negligible

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Q29.

Where is the Laplace's equation valid?

  • A. only in free space
  • B. only in conductors
  • C. only in charge free dielectric regions
  • D. only in cavities founded on all sides by conducting wall

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Q30.

The equation of continuity defines the relation between

  • A. electric field and magnetic field
  • B. electric field and charge density
  • C. flux density and charge density
  • D. current density and charge density

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