Interference generated by electrical equipment and automobile ignition systems w

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Question
Interference generated by electrical equipment and automobile ignition systems when observed closed to earth is
Options
A. horizontally polarized
B. vertically polarized
C. polarized both horizontally
D. not polarized

Correct Answer

vertically polarized

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2. A rectangular waveguide has two stubs each length connected at the source end. The stubs are short circuted. Then
Options
A. the longitudinal current is power current and current in stubs is reactive
B. the longitudinal current is reactive current and current in stubs is power current
C. both power and reactive exists in both longitudinal direction and stubs
D. the current in stubs is zero

3. Loading of a line means
Options
A. increasing inductance of line
B. increasing distributed inductance of line
C. decreasing distributed inductance of line
D. decreasing inductance of line

5. If a microstrip is enclosed in a metal enclosure
Options
A. the radiation losses are increased
B. the radiation losses are reduced RL
C. the capacitance becomes zero
D. the inductance becomes zero

7. Consider the following statements
1. Usable bandwidth of ridge wave guide is more than that of rectangular waveguide.
2. For a given value of TM₁₀ cutoff frequency the cross section of ridge wave guide is lesser that that of rect angular waveguide.
3. Ridge wave guide has higher conductor losser than a rectangular waveguide.
4. Ridge guide has higher conductor losser than a rectangular waveguide.
Which of the above statements are correct?
Options
A. 1 and 2 only
B. 1, 2 and 3 only
C. 2 and 3 only
D. All

9. In laboratory experiment the output from reflex klystron is moderated by square wave because
Options
A. it is easy to generate a square wave
B. crystal diode operates in square law region of i-v characteristics
C. it prevents frequency modulation
D. detector circuit is less complicated

10. In a TWT the loss in attenuator is
Options
A. almost equal to forward gain of tube
B. much less than forward gain of tube
C. much higher than forward gain of tube
D. almost infinite

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