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Electromagnetic Field Theory
The potential that appears at a point in space due to the current which caused it is called potential
Retardation
Oscillating
Lagging the current
Accelerating
Retardation
Oscillating
Lagging the current
Accelerating
Answer
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Related Question
Electromagnetic Field Theory
Mutual inductance between two magnetically coupled coils depends on
permeability of core.
all of above.
cross sectional area of their common core.
the number of their turns.
permeability of core.
all of above.
cross sectional area of their common core.
the number of their turns.
Answer
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Electromagnetic Field Theory
Gradient of scalar field is expressed as
Maximum rate of increase of scalar function at a point.
Circulation of a vector field per unit area as the area tends to zero.
Gradient of divergence of a vector field minus the curl of the vector field.
Outward flux of a vector field per unit volume as the volume about the point tends to zero.
Maximum rate of increase of scalar function at a point.
Circulation of a vector field per unit area as the area tends to zero.
Gradient of divergence of a vector field minus the curl of the vector field.
Outward flux of a vector field per unit volume as the volume about the point tends to zero.
Answer
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Electromagnetic Field Theory
In case of all flux from the current in coil 1 links with coil 2, the coefficient of coupling will be
Zero.
1.0.
0.5.
2.0.
Zero.
1.0.
0.5.
2.0.
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.
600.
150.
300.
450.
600.
150.
300.
Answer
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Electromagnetic Field Theory
The energy stored in the magnetic field at a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying an current at 10 A, is
0.015 J.
1.15 J.
0.5 J.
0.15 J.
0.015 J.
1.15 J.
0.5 J.
0.15 J.
Answer
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