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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of following is not a unit of flux?

 Telsa.
 Weber.
 Maxwell.
 All of above.

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

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Electromagnetic Field Theory
The tubes of force within the magnetic material are known as

 none of them.
 lines of force.
 magnetic flux.
 tubes of indication.

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Electromagnetic Field Theory
It is best to use for coupling a coaxial line to a parallel wire transmission line.

Tee
Balun
Slotted line
Directional Coupler

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Electromagnetic Field Theory
A point charge in space is attracted towards a dielectric material because of the

 all of above.
 maximisation of electrostatic flux.
 phenomenon of dielectric polarisation.
 dielectric hysteresis.

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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.
 80π coulombs.
 10π coulombs.
 40π coulombs.

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