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Electromagnetic Field Theory
Electric field inside a hollow metallic charged sphere is
increasing towards centre.
decreasing towards centre.
zero.
none of above.
increasing towards centre.
decreasing towards centre.
zero.
none of above.
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
40π C.
5 C.
None of above.
10 C.
40π C.
5 C.
None of above.
10 C.
Answer
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Electromagnetic Field Theory
A coil of 300 turns is wound on a non-magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The current of 3 A will be
113.04 µH.
37.68 µH.
113.04 mH.
37.68 mH.
113.04 µH.
37.68 µH.
113.04 mH.
37.68 mH.
Answer
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Electromagnetic Field Theory
Which of this statement is not characteristic of a static magnetic field
it has no sink or sources.
magnetic flux lines are always closed.
it is solenoidal.
it is conservative.
it has no sink or sources.
magnetic flux lines are always closed.
it is solenoidal.
it is conservative.
Answer
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Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is
450.
150.
600.
300.
450.
150.
600.
300.
Answer
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Electromagnetic Field Theory
The frequency of the power wave associated with an electromagnetic wave having field as E = e-z/δ cos(ω - zδ) is given by
ω/2π.
ω/4π.
ω / π.
ω.
ω/2π.
ω/4π.
ω / π.
ω.
Answer
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