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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of the following represents ohms law

 I = GV
All of these
 J = σE
 V = RI

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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

 2.52 V.
 1.26 V.
 1.31 V.
 2.62 V.

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Electromagnetic Field Theory
Ohm’s law in point from field theory can be expressed as

 J = σE.
 J = E / σ.
 R = ρ × ( l / A).
 V = IR.

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Electromagnetic Field Theory
Radiation intensity in a given direction is the

Power radiated per unit solid angle in that direction
Energy radiated per square metre
None of these
Power radiated per square metre

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Electromagnetic Field Theory
Poyniting vector has the dimensions

 Watts/metre2.
 Watt/metre.
 Watt × metre2.
 Watt × metre.

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Electromagnetic Field Theory
Midway between two equal and similar charges, a third equal and similar charge is placed, then this third charge will

 will move out of the field of influence of two charges.
 not be equilibrium.
 be in unstable equilibrium.
 remain in stable equilibrium.

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