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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.

 0.
  1.77 mm.
 1.32 mm.
 0.88 mm.

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Electromagnetic Field Theory
Self inductance of magnetic coil is proportional to

 1 / N.
 N.
 1 / N2.
 N2.

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Electromagnetic Field Theory
A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of electric field intensity, E, at a distance r (o less than r less than R) inside the sphere

 QR/(4π εo r3).
 3 Qr/(4 π εo R3).
 Qr/(4 π εo R3).
 Q/(4 π εo r3).

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Electromagnetic Field Theory
A magnetic field B = 5 × 10-2 uz T exerts a force on 0.02 m conductor along the x-axis. The conductor carried a current of 5 mA in the – ux direction. What force must be applied to the conductor to hold it in position

 5 × 10-5 uz N.
 5 × 10-5 ux N.
 5 × 10-5 uy N.
  - 5 × 10-5 uy N.

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Electromagnetic Field Theory
A metal sphere with 1 m radius and a surface charge density of 10 coulombs/m2 is enclosed in a cube of 10 m side. The total outward electric displacement normal to the surface of the cube is

 40π C.
 10 C.
 None of above.
 5 C.

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Electromagnetic Field Theory
A conductor of length 100 cm moves at right angles to a magnetic field of flux density 1.5 Wb/m2 with a velocity of 50 m/s. The induced emf in the conductor will be

 150 V.
 75 V.
 37.5 V.
 50 V.

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MORE MCQ ON Electromagnetic Field Theory

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