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Electromagnetic Field Theory

Electromagnetic Field Theory
The electric flux is given D = (2y2 + z) Ix + 4xy Iy + x Iz C/m2. The volume charge density at point (-1, 0, 3) is

 - 4 C/m3.
 - 2 C/m3.
 0 C/m3.
 - 8 C/m3.

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Electromagnetic Field Theory
If the static magnetic flux density is B, then

  Divergence of B = 0.
 Divergence of B = J.
 Curl of B = J.
 Curl of B = 0.

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Electromagnetic Field Theory
Which of following can induce the maximum induced voltage ?

 1 amp 100 Hz.
 1 amp 1 Hz.
 1 amp dc.
 20 amp dc.

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Electromagnetic Field Theory
Coulombs law for the force between electric charges most closely resembles with

 Law of conservation of energy.
 Newtons law of gravitation.
 Newtons law of motion.
 Gauss theorem.

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Electromagnetic Field Theory
An inductor designed with 400 turns coil wound on an iron core of 16 cm2 cross sectional area and with a cut of air gap length of 1 mm. The coil is connected to a 230 V, 50 Hz supply. Neglected coil resistance, core loss, iron reluctance and leakage inductance. Find the current in the inductor.

 2.28 A.
 9.04 A.
 4.56 A.
 18.08 A.

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Electromagnetic Field Theory
A long straight wire carries a current I = 10A. At what distance is the magnetic field H = 1A/m?

 1.59 m.
 1.19 m.
 1.39 m.
 1.29 m.

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