Antennas and Transmission Media — MCQs – EE

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1. An antenna is used to:



2. The part of a communication system that radiates electromagnetic waves is called:



3. The ability of an antenna to focus energy in a particular direction is called:



4. The ratio of power radiated in a given direction to the average power is called:



5. The polarization of an antenna refers to:



6. The most commonly used antenna for radio broadcasting is the:



7. A half-wave dipole antenna has a length equal to:



8. The directional antenna used for long-distance communication is the:



9. The antenna used in satellite communication is generally a:



10. The antenna used in TV receivers is commonly a:



11. The efficiency of an antenna is the ratio of:



12. The region far from the antenna where radiation is uniform is called:



13. The bandwidth of an antenna refers to:



14. The main advantage of a parabolic reflector antenna is:



15. The polarization of satellite communication antennas is usually:



16. A waveguide is used to:



17. The transmission medium that uses total internal reflection is:



18. The main advantage of optical fiber communication is:



19. Coaxial cables are commonly used for:



20. Twisted pair cables are mainly used in:



21. The main disadvantage of coaxial cable is:



22. The loss of signal power during transmission is known as:



23. In a waveguide, electromagnetic waves propagate in:



24. The impedance of free space is approximately:



25. A horn antenna is often used as:



26. The ground wave propagation is significant for:



27. Sky wave propagation is mainly used for:



28. Line-of-sight communication is used in:



29. The phenomenon of wave bending around obstacles is known as:



30. The transmission medium with the least signal interference is:



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