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Electromagnetic Field Theory

Electromagnetic Field Theory
If E is the electric field intensity, then what is the value of divergence of (curl of E)?

 Null vector.
 | E |.
 Zero.
 E.

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Electromagnetic Field Theory
In case of all flux from the current in coil 1 links with coil 2, the coefficient of coupling will be

 1.0.
 Zero.
 0.5.
 2.0.

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Electromagnetic Field Theory
RF inductor are characterized by

 high current rating and low resistance.
 high current rating and high resistance.
 low current rating and high resistance.
 low current rating and low resistance.

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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.

 9.04 A.
 2.28 A.
 4.56 A.
 18.08 A.

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Electromagnetic Field Theory
Electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its centre is

 4πQ / 6ε.
 Q / 4π.
 Q / 6ε.
 Q / 6.

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

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MORE MCQ ON Electromagnetic Field Theory

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