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Electromagnetic Field Theory
A pure inductor is connected across a voltage source. Find the active power drawn by the inductor?
0
None of these
either 1 or 2
maximum
0
None of these
either 1 or 2
maximum
Answer
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Related Question
Electromagnetic Field Theory
In a perfect conductor the incident and reflected wave combine to produce
A standing wave which is not progressing
A stronger reflected wave
A stronger incident wave
None of these
A standing wave which is not progressing
A stronger reflected wave
A stronger incident wave
None of these
Answer
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Electromagnetic Field Theory
The electrical field strength at a distance point A due to a point charge +q, located at the origin, is 100 µl v/m. If the point charge is now enclosed by a perfectly conducting metal sheet sphere whose centre is at origin, A, outside the sphere, becomes
- 100 μ v/m.
None of above.
0.
100 μ v/m.
- 100 μ v/m.
None of above.
0.
100 μ v/m.
Answer
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Electromagnetic Field Theory
Skin depth is proportional to
1/√σ.
√(σ).
Permeability.
Frequency.
1/√σ.
√(σ).
Permeability.
Frequency.
Answer
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Electromagnetic Field Theory
Conductor is constant and field is varying then emf will be induced. This principle is called
static induced emf.
virtually induced emf.
None of these
dynamically induced emf.
static induced emf.
virtually induced emf.
None of these
dynamically induced emf.
Answer
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Electromagnetic Field Theory
The magnetic field required to reduce the residual magnetism to zero is called
Hysteresis.
Retentivity.
Saturation magnetism.
Coercivity.
Hysteresis.
Retentivity.
Saturation magnetism.
Coercivity.
Answer
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