Bissoy.com
Doctors Medicines MCQs Q&A

Which fiber is preferred for long distance communication?

Which fiber is preferred for long distance communication? Correct Answer Step index single mode fiber

  • Single-mode step indexed fibers are widely used for wideband communications are preferred for long-distance communication.
  • Single-mode step-index fiber is used to eliminate modal dispersion during optical communication.
  • In this fiber, a light ray can travel on only one path so minimum refraction takes place hence, no pulse spreading permits high pulse repetition rates.

 

Advantages of single-mode fiber:

1) Low signal loss

2) No modal dispersion

3) Does not suffer from modal dispersion

4) Can be used for higher bandwidth applications

5) Long-distance applications

6) Cable TV ends

7) High speed local and wide area network

Single-mode fiber core diameter is much smaller than multimode fiber.

 

The multimode step-index multimode fiber suffers from Modal dispersion.

 

 

  • Rays of light enter the fiber with different angles to the fiber axis. The limit is the fiber’s acceptance angle.
  • Rays that enter with a shallow angle travel a more direct path and arrive sooner than those that enter at steeper angles.
  • This arrival of different modes of light at different times is called modal dispersion.

Related Questions

Some of the physical and functional advantages of optical fiber communication are mentioned here. Select the option which tells about the functional advantages of optical fiber communication. I. The transmission bandwidth of the fiber optic cables is higher than the metal cables. II. Since these cables are di-electric, no spark hazards are present. III. Fibre optic cables last longer than copper cables. IV. The amount of data transmission is higher in fiber optic cables. V. Fibre optic cables are immune to electromagnetic interference. VI. These are not affected by electrical noise.
Consider the statements given below and select the correct statement(s)
1. Computer-mediated communication (CMC) is defined as any human communication that occurs through the use of two or more electronic devices.
2. Computer-mediated Communication can be broken down into two forms i.e. synchronous and asynchronous.
3. Synchronous computer mediated communication refers to communication which occurs in real time.
4. Asynchronous computer mediated communication refers to communication which takes place when the parties engaged are not communicating in unison.
Which of the following set of statements are correct for describing the human communication process?
1. Non-verbal communication can stimulate ideas.
2. Communication is a learnt ability.
3. Communication is not a universal panacea.
4. Communication cannot break down.
5. More communication means more effective learning by students.
6. Value of what is learnt through classroom communication is not an issue for students.
Select the correct answer
If the first two statements are true, the third statement is :
I. Oat cereal has more fiber than corn cereal but less fiber than bran cereal.
II. Corn cereal has more fiber than rice cereal but less fiber than wheat cereal.
III. Of the three kinds of cereal, rice cereal has the least amount of fiber.
Consider the following statements: 1. Fiber optics is based on the principle of total internal reflection. 2. In an optical fiber communication system, power consumption is extremely low. 3. In India, Reliance Group of Industries is engaged in the manufacture of optical fiber. 4. Optical fiber communications are free from radio frequency interference. Which of the following statements is/are correct?
Match List I with List II List I (Examples of Communication) List II (Type of Communication) a)  A company boss telephones his / her secretary for some help from outside. i)  Marketing communication b)  A company issues a circular of guidelines for its employees. ii)  Horizontal communication c)  Employees discuss certain issues among themselves. iii)  Vertical communication d)  A company sends a formal letter to its retailers and wholesalers. iv)  Informal communication   Choose the correct answer from the options given below:
Mohan traveled five cities (A, B, C, D and E) starting from home by a car which has a mileage such that the car can travel 10 km in 1 liter petrol. Distance between city A and B is twice the distance between home to city A. Distance between city B and C is thrice the distance between home to city A. Distance between city C and D is 100. Distance between city D and E is 1.5 times than the distance between B and C. Average distance traveled by Mohan was 41 km between five cities. Find how much petrol was needed by Mohan to travel from city B to D.
Which of the following statements about communication is/are either true or false?
1. Gang plank theory of Henry Fayol is an example of vertical communication.
2. Encoded messages are not always decoded effectively because of different fields of organism.
3. 'Filtering' is not an intervention which vitiates communication.
4. 'Grapevine' communication moves faster than formal communication.
Which of the following statements are true with regards to communication? 1) When the teacher warns a student by looking at him is non-verbal communication. 2) The Manager tells the clerk to complete the file by next day is a formal communication. 3) When communication takes place between two persons of different levels who have no direct reporting relationships is called Lateral communication.
Farah while teaching the theme 'Means of communication' to class III students uses which of the following strategies to encourage inquiry among learns? A) Asks students to collect and classify pictures of means of communication B) Shows a video of means of communication  C) Asks students to narrate their experiences of means of communication and discusses with them  D) Shows a power-point presentation on means of communication