9394949438

[LATEST]$type=sticky$show=home$rm=0$va=0$count=4$va=0








COMMUNICATION SYSTEM Quiz-14

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background. Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1. Which one of the following statements is wrong?
  •  Radio waves in the frequency range 30 MHz to 60 MHz are called sky waves
  •  Radio horizon of the transmitting antenna for space wave is dT=√( 2RhT )  (R=radius of earth,hT=height of transmitting antenna)
  •  Within the skip distance neither the ground waves nor the sky waves are received
  •  The principle of fibre optical communication is total internal reflection
Solution
Within the skip distance neither the ground waves nor the sky waves are received

Q2.A step index fibre has a relative refractive index of 0.88%. What is the critical angle at the corecladding interface
  •  60°
  •  75°
  •  45°
  •  None of these
Solution
Here (μ12)/μ1 =0.88/100⇒μ21 =0.9912 
∴ Critical angle θc=sin-1⁡(μ21 )=sin-1(0.9912)=82°24'

Q3. Venus looks brighter than other stars, due to
  •   Atomic fusion takes place on its surface
  •  It is closer to the earth than other stars
  •  It has higher density than other stars
  •  It is heavier than other stars
Solution
Venus looks brighter than other stars because it is closer to earth than other stars.

Q4. The SKIP ZONE in Radio Wave Transmission is that range where
  •  There is no reception of either ground wave or sky wave
  •  The reception of ground wave is maximum but that of sky wave is minimum
  •  The reception of ground wave is minimum, but that of sky wave is maximum
  •  The reception of both ground and sky wave is maximum
Solution
There is no reception of either ground wave or sky wave

Q5.An earth satellite emits a radio signal of frequency 108 Hz. An observer on the ground detects beats between the received signal and a local signal also of frequency 108 Hz. At a particular moment, the beat frequency is 2400 Hz. What is the component of satellite velocity directed towards earth at this moment?
  •  1080 ms-1
  •  1800 ms-1
  •  3600 ms-1
  •  7200 ms-1
Solution
Here, v-v'=∆v=2400 Hz 
As ∆v=vv/c or v=c∆v/v=(3×108×2400)/108 =7200 ms-1  

Q6. A diode AM detector with the output circuit consisting of R=1 kW andC=1 μF would be more suitable for detecting a carrier signal of
  •  0.1 kHz
  •  0.5 kHz
  • 1 kHz
  •  10 kHz
Solution
Given R=1 kΩ Or R=1×103 C=1μF C=1×10-6
In this condition frequency of carrier signal 1/Rc <<fc 
 1/1×103×10-6 <<fc ∴fc>>1 kHz Because frequency greater than 1 So fc=10 kHz

Q7.If sky wave with frequency of 50 MHz is incident on D region at an angle of 30°, then angle of refraction is
  •  15°
  •  30°
  •  60°
  •  45°
Solution
For D-region, N=109 m-3 μ=√(1-(81.45 N)/v2 )=√(1-(81.45×109)/(50×106 )2 )=1 μ=sin⁡i/sin⁡r =1 Or sin⁡r=sin⁡i or r=i=30°

Q8. What is the refractive index of the fiber core?


  •  1.556
  •  1.453
  •  1.425
  •  1.626
Solution
Taking refraction from air to core of optical fiber. Then, μ10 =sin⁡ 10°/sin⁡ 7° =0.1736/0.1219=1.424 or μ1=1.424 (asμ2=1)

Q9.A laser beam of pulse power 1012 W is focused on an object of area 10-4 cm2. the energy flux in Wcm2 at the point of focus is
  •  1020
  •  1016
  •  108
  •  104
Solution
Electric flux ϕ=(pulse power)/area =1012/10-4 =1016 Wcm-1

Q10. When the modulation percentage is 75, an AM transmitter produces 10 kW. How much of this is carrier power?
  •  10 kW
  •  13.33 kW
  •  7.5 kW
  • 7.81 kW
Solution
Pt=Pc (1+m2/2) Pc=Pt/1+m2/2 =10/1+1/2 (3/4)2 =10×32/41 Pc=7.81 kw

Want to know more

Want to Know More
Please fill in the details below:

INNER POST ADS

Latest IITJEE Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide

Latest NEET Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide

Name

Admissions,1,Alternating Current,60,AP EAMCET 2020,1,Basic Maths,2,BCECE 2020,1,best books for iit jee,2,best coaching institute for iit,1,best coaching institute for iit jee preparation,1,best iit jee coaching delhi,1,best iit jee coaching in delhi,2,best study material for iit jee,4,BITSAT Registration 2020,1,Blog,62,books for jee preparation,1,books recommended by iit toppers,3,Capacitance,3,CBSE,1,CBSE accounts exam,1,CBSE boards,1,CBSE NEET,9,cbse neet 2019,3,CBSE NEET 2020,1,cbse neet nic,1,Centre of Mass,2,Chemistry,58,Class 12 Physics,15,coaching for jee advanced,1,coaching institute for iit jee,2,Collision,2,COMEDK UGET 2020 Application Form,1,COMEDK UGET 2020 Exam Form,1,COMEDK UGET news,1,CUCET 2020,2,Current Electricity,4,CVR college,1,Electromagnetic Induction,3,Electronics,1,Electrostatics,3,Energy,1,Fluid Mechanics,4,Gravitation,2,GUJCET 2020 Application Form,1,Heat,4,iit admission,1,iit advanced,1,iit coaching centre,3,iit coaching centre in delhi,2,iit coaching classes,2,iit coaching in delhi,1,iit coaching institute in delhi,1,iit entrance exam,1,iit entrance exam syllabus,2,iit exam pattern,2,iit jee,5,iit jee 2019,3,iit jee advanced,2,iit jee books,3,iit jee coaching,2,iit jee exam,3,iit jee exam 2019,1,iit jee exam pattern,3,iit jee institute,1,iit jee main 2019,2,iit jee mains,3,iit jee mains syllabus,2,iit jee material,1,iit jee online test,3,iit jee practice test,3,iit jee preparation,6,iit jee preparation in delhi,2,iit jee preparation time,1,iit jee preparation tips by toppers,2,iit jee question paper,1,iit jee study material,3,iit jee study materials,2,iit jee syllabus,2,iit jee syllabus 2019,2,iit jee test,3,iit preparation,2,iit preparation books,5,iit preparation time table,2,iit preparation tips,2,iit syllabus,2,iit test series,3,IITJEE,100,IPU CET,1,JEE Advanced,83,jee advanced exam,2,jee advanced exam pattern,1,jee advanced paper,1,JEE Books,1,JEE Coaching Delhi,3,jee exam,3,jee exam 2019,6,JEE Exam Pattern,2,jee exam pattern 2019,1,jee exam preparation,1,JEE Main,85,jee main 2019,4,JEE Main 2020,1,JEE Main 2020 Application Form,2,JEE Main 2020 news,2,JEE Main 2020 Official Answer Key,1,JEE Main 2020 Registration,1,JEE Main 2020 Score,1,JEE Main application form,1,jee main coaching,1,JEE Main eligibility criteria,3,jee main exam,1,jee main exam 2019,3,jee main online question paper,1,jee main online test,3,JEE Main Paper-2 Result,1,jee main registration,2,jee main syllabus,2,JEE mains 2020,1,jee mains question bank,1,jee mains test papers,3,JEE Mock Test,2,jee notes,1,jee past papers,1,JEE Preparation,2,jee preparation in delhi,1,jee preparation material,4,JEE Study Material,1,jee syllabus,6,JEE Syllabus Chemistry,1,JEE Syllabus Maths,1,JEE Syllabus Physics,1,jee test series,3,KCET - 2020,1,Kinematics,1,Latest article,5,Latest Articles,61,Latest News,34,latest news about neet exam,1,Laws of Motion,2,Magnetic Effect of Current,3,Magnetism,3,MHT CET 2020,2,MHT CET 2020 exam schedule,1,Modern Physics,1,NCERT Solutions,15,neet,3,neet 2019,1,neet 2019 eligibility criteria,1,neet 2019 exam date,2,neet 2019 test series,2,NEET 2020,2,NEET 2020 Application Form,1,NEET 2020 Eligibility Criteria,1,NEET 2020 Registration,1,neet application form,1,neet application form 2019 last date,1,Neet Biology Syllabus,1,Neet Books,3,neet eligibility criteria,3,neet exam 2019,7,neet exam application,1,neet exam date,1,neet exam details,1,neet exam pattern,6,neet exam pattern 2019,2,neet examination,1,neet mock test 2019,1,Neet Notes,3,Neet Online Application Form,3,neet online test,2,neet past papers,1,neet physics syllabus,1,neet practice test,2,NEET preparation books,1,neet qualification marks,1,NEET question paper 2019,1,neet question papers,1,neet registration,1,Neet Study Material,3,neet syllabus,6,neet syllabus 2019,5,NEET Syllabus 2020,1,neet syllabus chemistry,1,neet syllabus for biology,1,neet syllabus for physics,1,neet test series,1,neet ug 2019,2,news,5,online study material for iit jee,1,Optical Instruments,1,Physics,110,physics books for iit jee,1,Power,1,Practical Physics,1,Quiz,5,Ray Optics,1,Rotational Motion,3,SHM,3,Simple Harmonic Motion,3,study materials for iit jee,1,Study Notes,110,study notes for iit jee,1,Thermodynamics,4,TS EAMCET Notification,2,Units and Dimensions,1,UPSEE 2020,1,UPSEE 2020 Application Form,2,UPSEE EXAM,1,Vectors,2,VITEE Application form,1,Wave Motion,3,Wave Optics,1,WBJEE 2020 Admit Card,1,WBJEE 2020 Answer Key,1,Work,1,
ltr
item
BEST NEET COACHING CENTER | BEST IIT JEE COACHING INSTITUTE | BEST NEET, IIT JEE COACHING INSTITUTE: QUIZ-14-COMMUNICATION-SYSTEM
QUIZ-14-COMMUNICATION-SYSTEM
https://1.bp.blogspot.com/-7tqwaBoc2hY/X5CToxrhX6I/AAAAAAAAAv0/nEGk1qy5fzYBaugutEZYrtOu6xPDYH8DwCLcBGAsYHQ/w510-h260/Quiz%2BImage%2B20%2B%25285%2529.png
https://1.bp.blogspot.com/-7tqwaBoc2hY/X5CToxrhX6I/AAAAAAAAAv0/nEGk1qy5fzYBaugutEZYrtOu6xPDYH8DwCLcBGAsYHQ/s72-w510-c-h260/Quiz%2BImage%2B20%2B%25285%2529.png
BEST NEET COACHING CENTER | BEST IIT JEE COACHING INSTITUTE | BEST NEET, IIT JEE COACHING INSTITUTE
https://www.cleariitmedical.com/2020/10/QUIZ-14-COMMUNICATION-SYSTEM.html
https://www.cleariitmedical.com/
https://www.cleariitmedical.com/
https://www.cleariitmedical.com/2020/10/QUIZ-14-COMMUNICATION-SYSTEM.html
true
7783647550433378923
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy