IIT JEE : Principles Of Communication QUESTIONS AND ANSWERS :: part3 : 1 to 5
Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :
1.Data communicated by optical fibres system is generally |
| digital |
| analog |
| modulated |
| unmodulated |
2.In AM wave the modulation index is 100%. If the carrier is suppressed the percentage saving in power will be |
| 66.6% |
| 50% |
| 75% |
| None of these |
3.Absorption of radiowaves by atmosphere depends upon |
| distance from transmitter |
| polarization of wave |
| polarization of atmosphere |
| frequency |
4.A 500 W carrier is amplitude modulated with modulation index of 60%. What will be total power of modulated wave |
| 640.5 W |
| 590 W |
| 780 W |
| 450 W |
5.In optical fibre, propagation angle of light must be less than or equal to |
| incident angle |
| refraction angle |
| reflection angle |
| critical angle |
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