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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of the following is zero in relation to electromagnetic fields?

 Div curl A.
 Div grad V.
 Curl curl A.
 Grad div A.

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Electromagnetic Field Theory
The force experienced by a current carrying conductor lying parallel to a magnetic field is

 Bil sinθ.
 BIL.
 zero.
 Bil cosθ.

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Electromagnetic Field Theory
The drawback of Daltons atomic structure is that, it says

 none of these.
 most of the volume of an atom is empty space.
 the atoms can neither be created nor be destroyed.
 unique nature of atom.

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Electromagnetic Field Theory
Find the strength of the magnetic field when a 2m long conductor is moving with a velocity 4m/s inducing an emf of 20V.

 5T.
 2.5T.
 0.5T.
 10T.

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Electromagnetic Field Theory
In above problem, if the inductance L1 and L2 in series aiding with 30 mH mutual inductance, then total inductance will be

 50 mH.
 100 mH.
 200 mH.
 150 mH.

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

High standing wave ratio
Poor directivity
Low directional coupling
Narrow bandwidth

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MORE MCQ ON Electromagnetic Field Theory

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