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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of following is the unit of inductance?

  Milli- henry.
 Ohm.
  Webers / m.
  Ampere turns.

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Electromagnetic Field Theory
A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 × 103 N, is known as

 pico - coulomb.
 micro - coulomb.
 coulomb.
 milli - coulomb.

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Electromagnetic Field Theory
In free space E (z, t) = 103 sin(ωt - βz) uy v/m. What is the value of H (z, t)

 (103/377) sin(ωt - β z)(-ux) A/m.
 None of above.
 (103/377) cos(ωt - β z)(-ux) A/m.
 (103/377) sin(ωt - β z)(ux) A/m.

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Electromagnetic Field Theory
A metal surface with 1 meter radius and surface charge density of 20 coulombs / m2 is enclosed in a 10 m side cube. The total outward electric displacement normal to the surface of the cube is

 none of these.
 10π coulombs.
 80π coulombs.
 40π coulombs.

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Electromagnetic Field Theory
A plane wave magnetic field is represented by Bx = cos(y – ct). The electric and magnetic fields will be zero in the direction

 Ex = Ey = 0, By = Bz = 0.
 Ey = Ez = 0, By = Bz = 0.
 Ex = Ey = 0, Bx = By = 0.
 None of these.

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Electromagnetic Field Theory
A magnetic vector potential is given by the expression A = (- cos x) (cos y) uz. The flux density at the origin is

 – uy.
 – 2 ux.
 2 ux.
  0.

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