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Electromagnetic Field Theory

Electromagnetic Field Theory
In above question no. 9, the average force on the core to reduce the air gap will be

 1666.22 N.
 6664.8 N.
 832.29 N.
 3332.47 N.

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Electromagnetic Field Theory
The magnetic field required to reduce the residual magnetism to zero is called

 Coercivity.
 Hysteresis.
 Saturation magnetism.
 Retentivity.

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Electromagnetic Field Theory
A dipole having a moment p – 3ux - 5uy + 10uz ncm is located at p(1,2,-4) in free space. The V as Q(2,3,4) is

 1.31 V.
 2.62 V.
 2.52 V.
 1.26 V.

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Electromagnetic Field Theory
Two point charges (Q and – Q) are situated at the vertex of the square. If potential at another vertex is 2 V, so potential at opposite vertex (diagonally) is

 √ 2 V.
 Zero.
  2 V.
 1 V.

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Electromagnetic Field Theory
A vector field A = p In is given in Cartesian coordinates. In cylindrical coordinates it will be represented as

 A = cosφ Ir - sinφ Ir.
 A = cosφ Ir + sinφ Iφ.
 A = cosφ Ir.
 A = sinφ Ir.

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Electromagnetic Field Theory
Poyniting vector has the dimensions

 Watt × metre.
 Watt/metre.
 Watt × metre2.
 Watts/metre2.

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MORE MCQ ON Electromagnetic Field Theory

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