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Electromagnetic Field Theory

Electromagnetic Field Theory
The energy stored in the magnetic field at a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying an current at 10 A, is

 0.5 J.
 1.15 J.
 0.015 J.
 0.15 J.

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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?

 2.5 mA.
 1.5 mA.
 1mA.
 2 mA.

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Electromagnetic Field Theory
Coulombs law for the force between electric charges most closely resembles with

 Gauss theorem.
 Newtons law of gravitation.
 Law of conservation of energy.
 Newtons law of motion.

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Electromagnetic Field Theory
The minimum height of outer atmosphere is

100 km
400 km
200 km
150 km

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Electromagnetic Field Theory
A circular ring is carrying uniformly distributed charge q and a point charge – Q on the axis of the ring. The magnitude of dipole moment of the charge system is (Assume distance between centre of ring and point charge is d and radius of ring R)

 QR.
  QD.
 QR2/d.
 Q√(R2 + d2).

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Electromagnetic Field Theory
The radiation pattern of loop antenna is

Circle
Cardoid or Limacon
Semicircle
Elliptical

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MORE MCQ ON Electromagnetic Field Theory

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