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Electromagnetic Field Theory

Electromagnetic Field Theory
The attenuation in waveguide above to cut off frequency

Infinite
Zero
Very high
Very low

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Electromagnetic Field Theory
A circular loop has its radius increasing at a rate of 2 m/s. The loop placed perpendicular to a constant magnetic field of 0.5 wb/m2. When the radius of the loop is 4 m. the emf induced in the will be

 Zero.
 0.8 π V.
 0.4 π V.
 8 π V.

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Electromagnetic Field Theory
Between a hollow and solid metal sphere, charge reside

 None of above.
 on outer surface in hollow and throughout in solid
 on outer surface in both.
 on outer surface in hollow and throughout in solid.

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Electromagnetic Field Theory
Plane z = 10 m carries charge 20 C/m2. The electric field intensity at the origin is

 – 18 πuz v/m.
 – 10 uz v/m.
 – 72 πuz v/m.
  – 360 πuz v/m.

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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)

  QD.
 QR.
 Q√(R2 + d2).
 QR2/d.

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

 0.15 joule.
 1.15 joule.
 0.015 joule.
 0.015 joule.

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MORE MCQ ON Electromagnetic Field Theory

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