IIT JEE : Principles Of Communication QUESTIONS AND ANSWERS :: part4 : 11 to 15
Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :
11.The glass of optical fibre has refractive index 1.6 and is clad with another glass of refractive index 1.52. The numerical aperture will be |
| 0.499 |
| 0.459 |
| 0.0625 |
| 0.352 |
12.A modulated wave has maximum amplitude of 750 mV and minimum amplitude of 250 mV. Then percentage modulation is |
| 33% |
| 50% |
| 75% |
| 100% |
13.If a carrier wave of amplitude to mV is modulated by an audio signal of amplitude 2 mV then amplitude of LSF and USF is given by |
| 0.2 mV |
| 0.5 mV |
| 1 mV |
| 2 mV |
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