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Electromagnetic Field Theory

Electromagnetic Field Theory
inductance (L2) in parallel without mutual coupling will be

 10 mH.
 20 mH.
 5 mH.
 15 mH.

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Electromagnetic Field Theory
Electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its centre is

 Q / 6.
 4πQ / 6ε.
 Q / 4π.
 Q / 6ε.

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Electromagnetic Field Theory
The main disadvantage of the two-hole directional coupler is

Narrow bandwidth
High standing wave ratio
Poor directivity
Low directional coupling

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Electromagnetic Field Theory
The field at any point on the axis of a current carrying coil will be

 at angle of 45° with the axis.
 perpendicular to the axis.
 parallel to axis.
 zero.

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Electromagnetic Field Theory
Biot-Savarts law states the relation between magnetic intensity and

 volume current only.
 filament current only.
 (A), (B), and (D) are all correct.
 surface current only.

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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

 0.
 None of above.
 - 100 μ v/m.
 100 μ v/m.

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