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Semiconductor and Electronics

Semiconductor and Electronics Notes for Class 11 - 12 Learning Outcomes Explain band theory of solid materials Explain conductor, non-conductor, and semiconductor by band theory Explain intrinsic and extrinsic semiconductors Explain the concept of electron and hole in semiconductors Explain the p-type and n-type semiconductor Explain the construction and function of the junction diode Explain rectification Explain the construction and function of a junction transistor Explain the use of transistor as amplifier and switch Explain conversion of a different number system Explain Binary operation Analysis of the program of different logic gate Explain band theory of solid materials Energy Band:   There is a slight difference in the energy of electrons revolving in the same orbit in an atom of any matter. The range between the maximum and minimum energy level of these electrons situated in the same orbit is called the energy band. The energy level and energy band are not the same. The energ

The Importance of Information and Communication Technology

The Importance of Information and Communication Technology

Information and Communication Technology can change the world

Information and Communication Technology is the key to the governance of the world. We can see the impact of Information and Communication Technology everywhere. Information and Communication Technology is the best way to improve a community, because most developments are now impossible without Information and Communication Technology. Our everyday tasks are also depend on Information and Communication Technology now. Employment, communication, business, treatment, and research - everything is depend on Information and Communication Technology. Information and Communication Technology is improving the lifestyle of people every day. Therefore, Information and Communication Technology can change the world very easily.

Importance of Information and Communication Technology in Education

Information and communication Technology in education improves engagement and knowledge retention. When ICT is integrated into lessons, students become more engage in their work. This is because technology provides different opportunities to make it more fun and enjoyable in terms of teaching the same things in different ways.

Importance of Information and Communication Technology in Today's World

Information and Communication Technology helps to build and grow the commerce business sector and generate maximum sectors to generate business is now minimised with an advancement in information and communication technology. It provides electronic security, storage, and efficient communication.

Importance of Information and Communication Technology in daily life

Information and Communication Technology has contributed a lot to change our everyday life such as letter to e-mail, market shopping to online shopping, classroom learning to e-learning, etc. This paper presents the effect of Information and Communication Technology as Home and Domestic Activities, Social Networking, Education, Health, Commerce, Banking, and Employment.

Questions and Answers:

What is Computer?

Ans: Computer is an electronic calculation device.

What is internet?

Ans: Internet is the network of networks. Hence, internet can be said to be the short form of International Network.

What is modem?

Ans: Modem is a device which transforms digital sign to analog sign (Modulation process) and alanog sign to digital sign (Demodulation process). Modem is the short form of Modulator and demodulator.

What is E-mail?

Ans: E-mail is an electric mail which is composed of sevral letters and anyone from any place of the world can communicate through E-mail.

What is Robot?

Ans: A robot is an electronic machine with artificial intelligence and it can run by itself or by a remote controller.

What do you mean by 'Broadcast'?

Ans: Broadcast is a one-way communication system where a person or any organization can communicate with many people or organizations.

What are two-way communication systems?

Ans: When more than one person can communicate with each other at a time, the system is called two-way communication system. For example - Mobile, Phone.

How many types are there to communicate with people?

Ans: There are two ways to communicate with people and they are -

(i) one way communication system

(ii) two-way communication system.

What is social networking?

Ans: Social network includes both one way and two-way personal communication systems. People communicate with one another, exchange information, and be organized through using this network.

What is the full meaning of SMS?

Ans: Short message service.

What is the name of national web portal of Bangladesh?


What is computer network?

Ans: Internal communication between two or more computers is called computer network.

What is server?

Ans: Mainly server is a very powerful computer that is a computer under network centrally installed and can communicate and exchange data or information in a work network.

What is client?

Ans: Computer those receive any type of information from the server of the network are called clients.

What is network media?

Ans: The devices by which computers connected to a network is called network media.

What is user?

The client who uses resources from the server is called user.

What is protocol?

Ans: The ascertained act followed by the network computers for exchanging data is called protocol.

What is topology?

Ans: The different systems or types of connecting computer is called topology.

What is E-ticketing?

Ans: Selling ticket through electronic means is called E-ticketing.

Tell the name of different types of topology.

Ans: Bus topology, Ring topology, Star topology, Tree topology, mesh topology.

What is data packet?

Ans: Data packet is a data block that is collecting of data.

What is the main activity of a router?

Ans: Main activity of router is to direct data or information.

What is node?

Ans: Every ICT device connecting along with a network is called node according to language of networking.


  1. আমার আপনার পোস্টটি অনেক ভালো লেগেছে। আমিও আপনার মতো ভালো ব্লগার হতে চায়। প্লিজ আমার এই পোস্টটি কোষ বিভাজন কাকে বলে , একটু চেক করবেন। আমার জন্য দোয়া করবেন।


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