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Electromagnetic Field Theory

Electromagnetic Field Theory
The Biot-savarts law is a general modification of

 Amperes law.
 Kirchhoffs law.
 Lenzs law.
 Faradays law.

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Electromagnetic Field Theory
Electric field intensity (E) at ant point in an electric field is equal to

 (potential gradient)1/2.
 (potential gradient)1/3.
 potential gradient.
 (potential gradient)2.

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Electromagnetic Field Theory
In case of antenna the ratio of the power radiated in the desired direction to the power radiated in the opposite direction is known as

Loss coefficient
Transmission efficiency
Front to back ratio
None of these

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Electromagnetic Field Theory
A dipole having a moment p – 3ux - 5uy + 10uz ncm is located at p(1,2,-4) in free space. The V as Q(2,3,4) is

 2.62 V.
 1.26 V.
 2.52 V.
 1.31 V.

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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

 150.
 600.
 300.
 450.

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Electromagnetic Field Theory
A point charge in space is attracted towards a dielectric material because of the

 phenomenon of dielectric polarisation.
 all of above.
 maximisation of electrostatic flux.
 dielectric hysteresis.

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MORE MCQ ON Electromagnetic Field Theory

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