# Electronics and Communication Engineering - Electromagnetic Field Theory

1.

For a distortionless line, the parameters are related as

 A. R/G = L/C B. R/L = 1 C. R/G = C/L D. RG = LC

Explanation:

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2.

A field can be

 A. harmonic B. divergence less C. solenoidal D. rotational

Explanation:

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3.

Phase velocity of waves propagating in a hollow metal waveguide is

 A. greater than the group velocity B. less than the velocity of light in free space C. equal to the velocity of light in free space D. equal to group velocity

Explanation:

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4.

If a plane electromagnetic wave satisfies the equation , the wave propagates in the (at an angle of 45° between the x and z direction)

 A. x-direction B. z-direction C. y direction D. xy plane

Explanation:

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5.

Good smoothing factor of a coil depends on

 A. inductance of the coil B. terminal voltage C. cross-sectional area of the wire of the coil D. property of the wire of the coil