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ELECTROMAGNETIC FIELD THEORY

Electromagnetic Field Theory
A wire 1 m long carries a current of 5A and is at an angle of 30o with B = 1.5 wb/m2. Magnitude of force is

 3.75 N.
 2 N.
 5 N.
 2.5 N.

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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.
 244 μN.
  1144 μN.
 144 μN.

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Electromagnetic Field Theory
The Kirchhoff’s current law is implict in expression

  Surface integral of (j.ds) = 0.
 Divergence of D = ρv.
 Divergence of B = 0.
 Curl of H = J + (δ D)/(δ t).

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Electromagnetic Field Theory
The magnetic field at any point on the axis of current carrying circular coil will be

 perpendicular to axis.
 parallel to axis.
 at an angle 45o with the axis.
 zero.

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Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

 37.68 μH.
 3.768 μH.
  113.04 μH.
 1.1304 μH.

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