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ELECTROMAGNETIC FIELD THEORY

Electromagnetic Field Theory
Magnetic current is composed of which of the following?

 Both conduction and displacement current.
 Only displacement current.
 Only conduction current.
None of these

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Electromagnetic Field Theory
What is the value of magnetic vector potential due to an infinitesimally small current element, evaluated at infinite distance from it?

 Depends on strength of current element.
 Unity.
 Zero.
 Infinity.

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Electromagnetic Field Theory
A long straight wire carries a current I = 10A. At what distance is the magnetic field H = 1A/m?

 1.19 m.
 1.29 m.
 1.39 m.
 1.59 m.

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Electromagnetic Field Theory
How much current must flow in a loop of radius 1m to produce a magnetic field of 1 mA/m?

 1.5 mA.
 1mA.
 2.5 mA.
 2 mA.

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Electromagnetic Field Theory
The magnetic intensity in A/m at the centre of circular coil of diameter 1m and carrying a current of 2A is

 4.
 3.
 8.
 2.

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