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Electromagnetic Field Theory

Electromagnetic Field Theory
Find H for centre of solenoid having finite length d = 1 unit where N = no of turns = 500, I = 2 A.

 100.
 500.
 None of these.
 1000.

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

 5 C.
 None of above.
 40π C.
 10 C.

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Electromagnetic Field Theory
MUF is depend upon

Electron density of the ionospheric layer
Received frequency by receiver
11 year sun spot cycle
Height of ionospheric layer

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Electromagnetic Field Theory
The force required to seperate two surfaces with a contact area measuring 5 cm by 6 cm, when flux density normal to the surface is 0.8 tesla, will be

 76400 N.
 764 N.
 76.4 N.
 7640 N.

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

Directional Coupler
Balun
Tee
Slotted line

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Electromagnetic Field Theory
Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s

 second law
 first law
 third law
 fourth law

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