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Electromagnetic Field Theory
What is the value of magnetic vector potential due to an infinitesimally small current element, evaluated at infinite distance from it?
Depends on strength of current element.
Infinity.
Unity.
Zero.
Depends on strength of current element.
Infinity.
Unity.
Zero.
Answer
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Related Question
Electromagnetic Field Theory
Poyniting vector has the dimensions
Watt/metre.
Watts/metre2.
Watt × metre2.
Watt × metre.
Watt/metre.
Watts/metre2.
Watt × metre2.
Watt × metre.
Answer
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Electromagnetic Field Theory
Magnetostriction is a phenomenon of
generation of magnetism in electrical conductors.
change in permeability of ferromagnetic materials during magnetism.
generation of electricity in ferromagnetic materials.
change in physical dimensions of ferromagnetic materials during magnetism.
generation of magnetism in electrical conductors.
change in permeability of ferromagnetic materials during magnetism.
generation of electricity in ferromagnetic materials.
change in physical dimensions of ferromagnetic materials during magnetism.
Answer
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Electromagnetic Field Theory
A sphere of 20 cm radius contains electrical charge of density 2/(r sinθ) c/m3. What is the total charge contained within the sphere?
0.335 C.
0.335/sinθ c.
0.
None of above.
0.335 C.
0.335/sinθ c.
0.
None of above.
Answer
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Electromagnetic Field Theory
In a dielectric material an applied field in x direction Ex = 5 v/m gives a polarization of px = 3/10π ux nc/m2. The susceptibility of the material is
2.16.
Infinity.
4.32.
Zero.
2.16.
Infinity.
4.32.
Zero.
Answer
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Electromagnetic Field Theory
Which of the following statement regarding waveguides is incorrect?
At frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
At waveguide can be coupled to a coaxial cable
Waveguides can handle large power at UHF and microwaves
At frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
At waveguide can be coupled to a coaxial cable
Waveguides can handle large power at UHF and microwaves
Answer
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