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Electromagnetic Field Theory

Electromagnetic Field Theory
A wire 1 m long carries a current of 5A and is at an angle of 30o with B = 1.5 wb/m2. Magnitude of force is

 2 N.
 2.5 N.
 3.75 N.
 5 N.

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Electromagnetic Field Theory
Poyniting vector has the dimensions

 Watt/metre.
 Watt × metre.
 Watt × metre2.
 Watts/metre2.

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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

 None of above.
 5 C.
 40π C.
 10 C.

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Electromagnetic Field Theory
Mutual inductance between two magnetically coupled coils depends on

 cross sectional area of their common core.
 permeability of core.
 the number of their turns.
 all of above.

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Electromagnetic Field Theory
A satellite that simply reflect back the signals from one region of the earth to the other region is known as

Active satellite
Passive satellite
Geostationary satellite
Orbiting satellite

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

Slotted line
Directional Coupler
Tee
Balun

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MORE MCQ ON Electromagnetic Field Theory

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