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Electromagnetic Field Theory

Electromagnetic Field Theory
An infinite non conducting sheet of charge has σ of 10-7 c/m3. Equipotential surface for a potential of 10 volts is.

  1.77 mm.
 1.32 mm.
 0.88 mm.
 0.

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Electromagnetic Field Theory
The electrical field strength at a distance point A due to a point charge +q, located at the origin, is 100 µl v/m. If the point charge is now enclosed by a perfectly conducting metal sheet sphere whose centre is at origin, A, outside the sphere, becomes

 - 100 μ v/m.
 None of above.
 0.
 100 μ v/m.

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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

 1 V.
 Zero.
 √ 2 V.
  2 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 Iφ.
 A = cosφ Ir.
 A = sinφ Ir.
 A = cosφ Ir - sinφ Ir.

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Electromagnetic Field Theory
An insulated metal sphere of 20 cm diameter is charged by rubbing with charges 2 × 10-8 C. Potential developed will be

 200 V.
 900 V.
 1800 V.
 0 V.

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Electromagnetic Field Theory
The radiation pattern of a parabola antenna is

None of these
A figure of directional
Omnidirectional
Highly directional

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