RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Rajasthan Board RBSE Class 8 Science Chapter 13 Information Technology

RBSE Solutions for Class 8 Science

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

RBSE Class 8 Science Information Technology Intext Questions and Answers

Page No 140.

Question 1.
How do we get Information about the events occur around city, state, country and abroad ?
Answer:
This type of information is obtained from science technology and other communication medium like radio, television, mobile, telephone etc.

Question 2.
Do you know about the mode of communication hundreds of year ago?
Answer:
In older time, government message was sent by ‘Dhol and Bigul’. Many kings used pigeon and horseman to send secret messages’.

Page No 141.

Question 3.
What are the different modes of Information communication used now a days?
Answer:
At present time the modes used in communication for information technology are – radio, television, fax, telephone, internet, internet services, mobile, etc.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 4.
Fill information about means of communication In the table given below –
(OR)
Write the uses of following modes of communications.

  1. Radio
  2. Telephone
  3. Television
  4. Fax

Answer:
RBSE Solutions for Class 8 Science Chapter 13 Information Technology-1

RBSE Class 8 Science Information Technology Text Book Questions and Answers

Choose the correct Answer:

Question 1.
in which year the radio broadcasting had started in India?
(a) In 1926 A.D
(b) in 1927 A.D
(c) In 1928 A.D
(d) In 1925 A.D
Answer:
(b) in 1927 A.D

Question 2.
At which place our country’s first telephone exchange was established?
(a) In Delhi
(b) In Mumbai
(c) In Pune
(d) in Banglore
Answer:
(b) In Mumbai

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 3.
The part of telephone instrument which is placed in front of mouth and collect sound and propagates the information in the form of electromagnetic waves is called –
(a) Mouth piece
(b) Receiver
(c) Cable wire
(d) None of the above
Answer:
(a) Mouth piece

Fill In the blanks with suitable words:

  1. The device based on information technology which send the graphs, charts, etc. through telephone network from one location to another location is called ……………………..
  2. …………………….. is system which provides mainly health services. The doctors diagnose and cure the disease of patient at far places through use of telecommunication and information technology.
  3. Telephone is word of ‘Greek’ language in which ‘tele’ means far and ‘phone’ means ……………………..
  4. The multichannel TV. programs can be seen directly at home through satellite by using dish antenna without using any cable operator. It is possible only due to ……………………..

Answer:

  1. Fax
  2. Telemedicine
  3. Sound
  4. D.T.H.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Short Answer type Questions:

Question 1.
Define the information technology.
Answer:
Information Technology:
That branch of engineering in which by use of computers information is sent and received by media of telecommunications, is known as information technology.

Question 2.
Tell any three names telecommunication medium of information technology based on internet.
Answer:
Following are the three media/modes of information technology based on internet:

  1. Telemedicine
  2. Broad Band
  3. Social Media.

Long answer type Questions:

Question 1.
What do you mean by word television? Explain the working system of television. Write the names of latest technology and advanced quality television of present era.
Answer:
Tele means far (distant) and vision means picture. Hence, television means seeing moving pictures and sound at distant places.

Process:
Sound and picture both are changed into electromagnetic waves from the program broadcasting centre and then broadcaster. These waves are dispersed everywhere through television transmission antenna. These waves are turned into sound and moving pictures by the television In our houses. A television set has parts like one tuner circuit, amplifier, detector circuit, power supply, picture tube and loudspeaker.

In common language picture tube is known as screen (parda). Picture tube has two lake spots of light sensitive substance. Coloured television camera has three electron tubes. It has such mirrors which divide the light entering into camera into three parts. Television can be controlled manually and with the help of remote control. In today’s world the modern and advanced types of televisions are following:

  1. Flat television
  2. L.C.D. TV. (Liquid Crystal Display T.V.)
  3. L.E.D. TV. (Light Emitting Diode T.V.)
  4. Curved T. V.
  5. Ultra High Definition (UHD 4K) T.V.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 2.
What is Internet ? Write the main names of communication means based on Internet and describe any two in detail.
Answer:
Internet:
Internet is an international information path which is made by joining networks of computers placed in different places through telephone lines.

Following are the media based on internet:

  1. Telemedicine
  2. Broad Band
  3. Social Media
  4. e-commerce

1. Telemedicine:
Basically telemedicine is a medical service or technique in which the doctor diagonise and treat distant patients with the help of telecommunication and information technology. In this technique the doctors and patients can see and talk each other. Apart from this E.C.G., X-ray. CAT Scan, M.R.1. etc. images can be viewed and checked by opening computer video tiles.

2. Broad Band:
Broad Band is the modern technique for the transmission of information in which many channels can be broadcasted through one cable wire.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 3.
Describe the utility of information technology. Make a list of possible cyber crimes by taking into consideration of human future and tell its safety measures.
(OR)
Make a list of possible cyber crimes by taking into consideration of human future and make out line for its safety measures.
Answer:
Following is the usefulness of information technology in various areas:
1. Computerization of Public Distribution System (PDS) and making supply related services public with the help of web.

2. Computerisation and networking of various public related offices and making appropriate improvement in their services.

3. Lack of transparency is one of the major causes of corruption. To overcome this right to information has been given main emphasis with the help of information technology information can be exchange quickly by the use of internet. intranet, extranet.

4. Making electronic governance a success, for controlling corruption and overall smooth functionary.

5. Information technology in banking sector has not only improved customer service hut has also helped in controlling financial frauds and has controlled corruption to a greater extent.

6. Office related to public dealing like imcome tax, electricity, water supply, city corporation, driving license, rationing, etc. have been transformed to paperless offices and using this technology to make things clean, transparent and less expensive.

Following are the major types of cyber crimes:

  1. Stealing of confidential information and unauthorised access, financial crime.
  2. Cyber terrorism.
  3. Cyber Warfare.
  4. Information Warfare
  5. Drug smuggling

Through various softwares and techniques all these cyber crimes can be controlled.

RBSE Class 8 Science Information Technology Important Questions and Answers

Objective Questions:

Question 1.
Modern mode of communication among the following is –
(a) Radio
(b) Television
(c) Mobile
(d) All of the above
Answer:
(d) All of the above

Question 2.
The new developed telephone among following is –
(a) Photo phone
(b) Cordless telephone
(c) Cellular phone
(d) All of the above
Answer:
(d) All of the above

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 3.
Most sutable mode for online internet purchasisng –
(a) Credit Card
(b) Rashion Card
(c) Adhar Card
(d) None of these
Answer:
(a) Credit Card

Question 4.
Compilation of commercial activities is done by –
(a) c – book
(b) e – commerce
(c) e – mail
(d) None of these
Answer:
(b) e – commerce

Question 5.
The social media application is –
(a) Whatsapp
(b) Facebook
(c) Twitter
(d) All of the above
Answer:
(d) All of the above

Fill In the blanks:

  1. In telephone device work of mouthpiece is ………………………… and earpiece is …………………………
  2. In the camera of coloured television three ………………………… tubes are present.
  3. Health providing system technology is …………………………
  4. ………………………… plays an important role in making communication technology strong.
  5. ………………………… is an ambitious facility of Rajasthan Government.

Answer:

  1. transmitter, receiver
  2. electron
  3. Tele- medicine
  4. Light nerves
  5. e – mitra

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

State True / False:

  1. All India Radio becomes famous by the name of Akashvani in 1957. ( )
  2. Telephone is a Greek word. ( )
  3. e-mail was send through postal services. ( )
  4. By the proper use of information technology corruption can be eradicated from the society. ( )
  5. Telephone was invented by Alexander Graham Bell. ( )
  6. STD service in India was first started between Lucknow and Kanpur in the year 1960. ( )
  7. Graph. chart and printed documents are sent from one place to another with the help of telephone network. ( )
  8. Coloured television camera has three electron tubes. ( )

Answer:

  1. True
  2. True
  3. False
  4. True
  5. True
  6. True
  7. False
  8. True

Match the Column –

Question 1.
Match the following correctly:
RBSE Solutions for Class 8 Science Chapter 13 Information Technology-3
Answer:

  1. (b)
  2. (c)
  3. (a)
  4. (e)
  5. (d)

Very Short Answer Type Questions:

Question 1.
Hundreds of years ago what equipment are used for communications?
Answer:
Bigul, Dhol, horseman. pigeon etc. are used for communications.

Question 2.
What were the problems-in communication equipment used hundreds of years ago?
Answer:

  1. They did consume much time.
  2. They did not remain secret.
  3. There was no surity of receiving messages on time.

Question 3.
What is meant by information technology?
Answer:
Branch of engineering by which information are received and sent by telecommunication mediums by use of computer is called ‘Information Technology’.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 4.
How radio transit messages?
Answer:
Radio is a strong and powerful tool of communication. This is a mode which sent signals in the form of invisible electromagnetic waves from one place to another.

Question 5.
What are the uses of radio?
Answer:
This is a good mode to enjoy entertainment, live commentary of Sports, news, music programme etc. With the help of radio communication police-van, fire brigade. aeroplane pilot, astronauts, ship commander contact with each-others.

Question 6.
What is the nature of radio waves? How many types of radio waves are used in radio broadcasting ?
Answer:
Radio waves are similar to light waves; the only difference is of frequency. Radio waves used in radio broadcasting are of three types

  1. Medium wave
  2. Short wave
  3. Ultrashort wave

Question 7.
Who invented telephone?
Answer:
Telephone was invented by Alexander Graham Bell.

Question 8.
When and where the telephone service were first started in India?
Answer:
Telephone was started in our country in 1882 with the establishment of Kolkala, Mumbai and Chennai telephone exchanges.

Question 9.
When and where S.T.D. services was firstly started in India?
Answer:
STD (Subscriber Trunk Dialing) service was firstly started in India in 1960 between Lucknow and Kanpur.

Question 10.
What are mouthpiece and earpiece in the telephone device?
Answer:
Part of the telephone put in front of mouth is called mouthpiece and pari attached to ear is called earpiece.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 11.
What are the new advanced telephone at present?
Answer:

  1. Photo phone
  2. Cordless telephone
  3. Cellular phone.

Question 12.
What is fax ? Who invented it ?
Answer:
Fax is an important achievement of information technology by which graph. chart, handwritten and pnnted documents are sent through telephone network from one place to another. The receiver gets the photocopy of the original. It was invents in the year 1 x 54 by Alexander Bell.

Question 13.
what is E-commerce?
Answer:
Buying and selling of goods and services on internet and making the customers aware about the products through advertisement is known as E-commerce.

Question 14.
What is telemedicine?
Answer:
Telemedicine is a health providing system in which doctor examine and treat the patient far away with the help of telecommunication and information technology.

Question 15.
What is the use of Integrated Service Digital Network (ISDN) technique in the area of telecommunication ?
Answer:
With the help of this technique through only one wire sound. written material, statistics and pictures can be transmitted.

Question 16.
What is Broad Band?
Answer:
Broad Rand is the modem technique for the transmission of information in which many channels can be broadcasted through only one cable wire.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 17.
Write the names of main social media sites.
Answer:
Facebook, twitter, blogger, pintrest, tumbler, etc.

Short Answer type Questions:

Question 1.
Poonam got her board mark sheet printed at an E-Mitra outlet. What are the uses of E-Mitra?
Answer:
There is a facility to do many government related works by e-mitra. Like

  1. Pay electric bills
  2. Pay telephone bills
  3. Submit water bill
  4. Getting adhaar card
  5. Making bhamashah card
  6. Filling of examination form and submission of fees,

Question 2.
Write the definition of Information technology. Write two names of tele communication medium of information technology based on Internet.
Answer:
Branch of engineering by which information are received and sent by telecommunication mediums by use of computer is called ‘Information Technology’. Two names of telecommunication medium of information technology based on Internet are

  1. E-commerce
  2. Social Media.

Question 3.
What is e-mail? Give Its importance.
Answer:
Now-a-days letters are sending through computers. This system is called as electronic mail or e-mail.
Advantages/Importances –

  1. Letter whom we have to sent is prepared in word-processor. After that this letter is sent to destination via telephone network.
  2. The receiver can also receive print out of the document.
  3. Electronic mail system is very fast.
  4. h saves both time and paper.
  5. Also it is cheap.

Question 4.
Give uses of e-mitra.
Answer:
These services are available online in rural areas by common service centre Kiosk and in urban areas by e-mitra Kiosk. This project is working since 2005, with this service any person work with ease to get electricity waler, telephone bill, bonafide certificate, ration card, Swam Jayanti Gram Swarojgar Yojna loan facility, learner driving Licence, bus pass of Rajasthan roadways etc.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 5.
Write a note on computer.
Answer:
Computer is the machine which can send thousands of word in 1 second from one place to another place. Ills impossible by voice of human to send in such rapid way. Any signal converted into computer language can be transmit in the form of micro pulses. Integrated Serice Digital Network (ISDN) is an ultra modern technique in the fields of telecommunication-is possible by the computer. By this technique, audio, written material, data and images are sent by a single wire. Among the four any two can be transmit simultaneously by ISDN.

Question 6.
What is Internet? Explain.
Answer:
Internet is an international information highway which is formed by connecting telephone line of computer placed at different locations. By internet information can be sent from one place to another instaiflly. Internet’ word is formed by combining two words of English ‘International’ and Network’. Which means – worldwide systems, it is an wireless system.

Question 7.
Name the facilities based on Internet.
Answer:

  1. e-commerce
  2. Telemedicine
  3. broadhand
  4. Social media
  5. e-mitra etc.

Question 8.
What is the role of artificial satellite in communication?
Answer:
We can hear and see, by the mode of television, the events happening in remote areas. By artiticial satellite any documents by telephone we fax it and received at far place. By talking to another person situated at remote place our audio and signals are sent to far places.

Question 9.
What is meant by cyber security? Why ¡s it essential ?
(OR)
Cyber security is necessary. Why?
Answer:
Cyber security can also be called as security of information technology’. It blocks the unautho-rized access to different computers, network, important and secret programmes and data. Government, Army. cooperates, financial institutions, hospital and other important institutions collect many secret information and after processing they sent to other computers. So it is necessity for national security and security of people, to safety of these important and secret data. Thus in this cyber period, there is need of cyber security and by different software and techniques, these documents can be secured.

Question 10.
What is meant by audio conference?
Answer:
There arc so many upgrades in modem telephone, with the new type of electronic phone many people can talk together with only one phone. By this phone without leaving of home or office, meeting of many people can be arranged, this system is called ‘audio conference’.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 11.
Explain In brief about satellite phone.
Answer:
‘Satellite phone’ are phone similar to simple mobile phone (smart phone). These phone can be connected to geo-satellites which are revolving in geo-stationary orbits, we cannot do it by simple mobile phone. ‘Set phone’ are used in those remote areas where there is no coverage area of general network provider. These phone are used in remote areas for different expeditions or for natural disaster when all other telecommunication modes arc fall.

Question 12.
Make a list of areas related to fax services.
Answer:

  1. Advertisement area. sending and receiving of graphics between agency and customer
  2. Share market and scientific services guidelines.
  3. Transmission of messages and of administrative services.
  4. Administrative Technology data.
  5. Transmission of many types of documents in energy industry.

Question 13.
What is Television ? When the television communication started in the world and in India?
Answer:
Television in such type of mode of communication in which we receive audio and video both. With the help of this we receive live video recording of events of the world. On 26 January 1926, John L. Baired successfully introduce television, in Britain for first time in the world. In our country service of television was started on 15 September. 1959 in Delhi.

Question 14.
How the programmes of television telecasted?
Answer:
Generally television are of two types – black & white and coloured. From transmission centre of programme, audio and video are transmitted by combining them into electromagnetic waves. These waves spread all side from television transmission antenna and after moving they collide with television receiving antenna. By television antenna these waves are again convened into audio and video by television in out household.

Question 15.
Write the names of main research centres In the field of information technology.
Answer:

  1. C-DOT, Delhi
  2. Centres of Indian Institute of Technology (IITs).
  3. Indian Institute of Sciences: Bengaluru.

Question 16.
What Is DTH ? Explain.
Answer:
It is a broadcasting technique. Direct to Home (DTH) T.V. broadcasting technique uses many multi channels T.V. programs can be directly viewed in TV. inside the house with the help of a small dish antenna without any cable operator’s satellite.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 17.
Observe the given table and complete It.
RBSE Solutions for Class 8 Science Chapter 13 Information Technology-4.1
Answer:
RBSE Solutions for Class 8 Science Chapter 13 Information Technology-4

Question 18.
Observe the given table and complete it.
RBSE Solutions for Class 8 Science Chapter 13 Information Technology-8
Answer:
RBSE Solutions for Class 8 Science Chapter 13 Information Technology-5

Question 19.
Pooja has received her marksheet of 8th class by internet. In which other field you can use Internet?
Answer:

  1. In E-commerce – by e-commerce we can sale or purchase any desired substance from the entire market of the world.
  2. Tele-medicine – In tele-medicine the doctors and patient can see and talk to each other. Apart from this E.C.G. X-ray. CAT scan. MRI etc. images can he viewed and be checked.
  3. Social media – Blog writing, social gaming. social network, video sharing, photo sharing. facebook, Twitter, blog etc. facilities are based on internet.
  4. E-mitra – E-mitra services are available to deposite bills of electricity, water, telephone and to prepare bonafied certificate, ration card. driving license etc.

Long Answer Type Questions:

Question 1.
What do you mean by telephone ? Who invented telephone and write about expansion of telephone service ¡n India?
Answer:
Telephone is a Greek word. Tele means distant (far) and phone means ‘sound’. Hence, telephone means sending sound to distant places. Telephone was invented by Alexander Graham Bell. In India telephone service was started in the year 1882 with the establishment of telephone exchanges at Kolkata. Mumbai and Chennai. As the time passed telephone work system developed.

A fier independence india had approximately 82000 telephone connections which increased to 970 million in the year 2015. In the year 1960 electronic exchange started and as a result Subscriber Trunk Dialing (STD) service started first time between Lucknow and Kanpur in the year 1960. Modern telephone has undergone many changes. With new type of electronic phone many people can talk together on the same phone. Through this phone many people’s meeting can he arranged in house or office.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 2.
In short describe about electronic or e-mail process (system).
Answer:
Now-a-days letters can he send through computers also. This technique is known as electronic mail or e-mail system. The material of the letter is formulated in the word processor and after that on whichever address it is to he sent it is sen through telephone network. The whole material of the letter is seen on the receiver’s TV.

mobile or computer. The receiver can also take out its print. E-mail system is very fast. It saves the time and is less expensive also. In our country telecommunication departments Delhi based C – DAT. Indian Institute of Technology. Indian Institute of Science. Bengaluru, etc. are places where its research and development work takes place.

Question 3.
In short describe the following:

  1. Social media
  2. E-mitra
  3. Broadband.

Answer:
1. Social media:
This technique is available in many types, for example – blog writing, business network, enterprise social network, forum, micro blog photo sharing, product/service review social book marking social gaming, social network, video sharing and visual world: etc. Facebook, twitter. blogger, pintrest, tumbler, etc. are some of main social media sites. Through social media people link with each other and share material. Whats App, Hike. etc. are mobile social media applications.

2. E-Mitra:
E-mitra service is an ambitious E-governance facility of Rajasthan government which is being provided to public in all 33 districts through PPP (Public Private Partnership) model to provide transparent services. In this service different government and private service related works are done under one E-platform.

These services are available online in the form of CSC (Common Service Centre) centres in rural areas and E-mitra in urban areas. ibis project has been working since 2005. Through this service people can visit any F-mitra centre near their houses and get their electricity, water, telephone bill submitted, bonafide certificate, ration card, Swam Jayathi Gram Swarojgar Yojna related loan, learner’s driving licence, Rajasthan Roadways Pass related work is completed necessarily and conveniently.

3. Broadband:
It is a modern technique of propagation of information in which many channels can be transmit a single cable or wire called as broad-band.
RBSE Solutions for Class 8 Science Chapter 13 Information Technology-6

Question 4.
Explain in detail about the service based on Internet i.e. e-commerce.
Answer:
E-commerce change the entire market of the world, where you can sell or purchase small to big items. By opening the website of e-commerce and by giving your order you can receive you favorite item. Credit card is the easy mode for shopping on Internet.
RBSE Solutions for Class 8 Science Chapter 13 Information Technology-7
Basically sale and purchase of items or services on Internet or convey information of products by advertisement is e-commerce. By including beneficial techniques from computer network. Internet, world wide web to electronic Data interchanges. E-Mail, Electronic File Transfer (E.F.T.) e-commerce is playing on important role for compilation of commercial activities.

RBSE Solutions for Class 8 Science Chapter 13 Information Technology

Question 5.
How information technology can be used to eradicate corruption from society.
(OR)
How the information technology can be used to remove the corruption from the society? Explain.
Answer:
Limitless capabilities of Information technology and Internet produce a new hope for hypothes comiption free society, to eradicate corruption from society information technology can be used as –
1. To make available the information to public about computerization and supply release information of public distribution system (P.D.S )

2. To reform in services of public dealing offices by computerization and networking.

3. Government said to give freedom of information related fundamental right to public for removing corruption and lack of transparency in work system. For this execution with the help of computerized information system, intranet, Internet and extranet the exchange of information can be done rapidly.

4. To control the tendency of corruption, government is planning to give electronic governance proper use of information technology to give clear and transparent governance.

5. In Banking system, introduction of information technology creates a reform in customer service unprecedented change but also control finaicial scams and corruption in effective way.

6. With the use of this technology public dealing offices i.e., income tax, central excise, border water, electricity, municipal system, driving license, ration can be converted into paperless off transparent and cheap.

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