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Electromagnetic Field Theory
Magnetostriction is a phenomenon of
change in permeability of ferromagnetic materials during magnetism.
change in physical dimensions of ferromagnetic materials during magnetism.
generation of magnetism in electrical conductors.
generation of electricity in ferromagnetic materials.
change in permeability of ferromagnetic materials during magnetism.
change in physical dimensions of ferromagnetic materials during magnetism.
generation of magnetism in electrical conductors.
generation of electricity in ferromagnetic materials.
Answer
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Related Question
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
10 C.
5 C.
40π C.
None of above.
10 C.
5 C.
40π C.
None of above.
Answer
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Electromagnetic Field Theory
Coulombs law for the force between electric charges most closely resembles with
Newtons law of gravitation.
Gauss theorem.
Law of conservation of energy.
Newtons law of motion.
Newtons law of gravitation.
Gauss theorem.
Law of conservation of energy.
Newtons law of motion.
Answer
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Electromagnetic Field Theory
The magnitude of force acting on a current carrying conductor placed in a magnetic field is independent of
cross-sectional area of conductor.
length of conductor.
current flowing through the conductor.
flux density.
cross-sectional area of conductor.
length of conductor.
current flowing through the conductor.
flux density.
Answer
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Electromagnetic Field Theory
A negative point charge q = - 40 nC is moving with velocity of 6 × 106 m/s in a direction specited by unit vector uy + 0.6 uz. Find the magnitude of force vector on the moving particle by the field B = 2 ux + 3 uy + 5 uz mT and E = 2 ux - 3 uy + 5 uz KV/m
244 μN.
1440 μN.
144 μN.
1144 μN.
244 μN.
1440 μN.
144 μN.
1144 μN.
Answer
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Electromagnetic Field Theory
For a line characteristic impedance zo terminated is load zo/3, the reflection coefficient is
– 1/3.
1/3.
– ½.
2/3.
– 1/3.
1/3.
– ½.
2/3.
Answer
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