# Electronics and Communication Engineering - Microwave Communication

### Exercise :: Microwave Communication - Section 6

36.

As compared to their values in free space

 A. velocity of electric wave in dielectric is smaller but wave length of electric wave is more B. both velocity and wave length of electric wave in dielectric are higher C. both velocity and wave length of electric wave in dielectric are smaller D. wave length of electric wave is less but velocity is more in dielectric

Answer: Option C

Explanation:

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37.

A 3 port circulator is in the given figure. Its scattering matrix is A. B. C. D. Answer: Option A

Explanation:

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38.

Characteristic impedance of a coaxial cable is inversely proportional to r.

 A. True B. False

Answer: Option A

Explanation:

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39.

A rectangular waveguide has a discontinuity in the form of reduced narrow dimension. In the equivalent circuit this discontinuity can be represented by

 A. a shunt capacitance at the discontinuity B. a shunt inductance at the discontinuity C. a shunt resistance at the discontinuity D. none of the above

Answer: Option A

Explanation:

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40.

Depth of penetration does not depend on frequency.

 A. True B. False

Answer: Option B

Explanation:

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