IIT JEE : Principles Of Communication QUESTIONS AND ANSWERS :: part3 : 26 to 30
Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :
26.Electronic transmission of a document to a distant place via telephone line is called |
| Fax |
| Modem |
| Telephone |
27.Which of the following is use for analogue to digital conversion ? |
| Amplitude modulation |
| Pulse code modulation |
| Frequency modulation |
| Phase modulation |
28.If the wavelength of the electromagnetic radiations is doubled, frequency of the electromagnetic radiations will be |
| same as earlier |
| half the earlier |
| double the earlier |
| four times the earlier |
29.The optical source is used to |
| convert electrical energy into optical energy |
| deted the signal |
| demodulate the electrical signal |
| All of the above |
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