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Electromagnetic Field Theory

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

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

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Electromagnetic Field Theory
When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon

The value of current
None of these
The direction of the conductor
The weight of the conductor

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Electromagnetic Field Theory
A negative point charge q = - 40 nC is moving with velocity of 6 × 106 m/s in a direction specited by unit vector uy + 0.6 uz. Find the magnitude of force vector on the moving particle by the field B = 2 ux + 3 uy + 5 uz mT and E = 2 ux - 3 uy + 5 uz KV/m

 1440 μN.
  1144 μN.
 244 μN.
 144 μN.

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Electromagnetic Field Theory
The ability of charged bodies to exert force on one another is attributed to the existence of

 neutrons.
 electric field.
 electrons.
 protons.

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Electromagnetic Field Theory
The critical frequency of ‘F’ layer is greater than 30 MHz.

False
True

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Electromagnetic Field Theory
The radiation pattern of loop antenna is

Elliptical
Cardoid or Limacon
Circle
Semicircle

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MORE MCQ ON Electromagnetic Field Theory

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