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Electromagnetic Field Theory

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

 2.
 8.
 4.
 3.

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Electromagnetic Field Theory
The core of coil length is 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be

 24 mH.
 12 mH.
 48 mH.
 3 mH.

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Electromagnetic Field Theory
Fleming's right hand rule may be applied to an electric generator to find out the direction of

 rotor rotation.
None of these
 magnetic field.
 induced emf.

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Electromagnetic Field Theory
Magnetic field intensity at centre of circular coil, of diameter 1 m and carrying a current of 2 A is

 4 A/m.
 2 A/m.
 8 A/m.
 1 A/m.

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Electromagnetic Field Theory
Find H for centre of solenoid having finite length d = 1 unit where N = no of turns = 500, I = 2 A.

 500.
 100.
 None of these.
 1000.

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Electromagnetic Field Theory
The radiation pattern of a parabola antenna is

None of these
Omnidirectional
A figure of directional
Highly directional

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