Textbook Solutions: Communications | Be an Explorer 5: Book Solutions, Notes & Worksheets - Class 5 PDF Download

Quick zone

A. Tick (✔) the correct option to complete the sentence.

1. Which of the following birds was used as a means of communication.
(a) Crow 
(b) Parrot
(c) Peacock
(d) Pigeon 
Ans: (d)

2. The Penny Post Service was introduced in _______.
(a) India
(b) England
(c) Japan
(d) China
Ans: (b)

3. _______ was the first newspaper of India.
(a) The Times of India 
(b) The Hindustan Times
(c) The Bengal Gazette
(d) The Hindu
Ans: (c)

4. _______ is not a personal communication.
(a) Mobile Phone
(b) Postcard
(c) Cinema (Movie)
(d) fax
Ans: (c)

5. _______ allows live TV telecasts.
(a) 2G phones
(b) Missiles
(c) Artificial satellites
(d) 5G network
Ans: (c)

B. Fill in the blanks.

1. Early man used _____________________for sending messages. 
Ans: Early man used fire for sending messages.

2. ____________________ invented the first generation mobile phone. 
Ans: Martin Cooper invented the first generation mobile phone.

3. Television is an example of ____________________ communication. 
Ans: Television is an example of mass communication.

4. _____________________stands for Nippon Telegraph and Telephone company. 
Ans: NTT stands for Nippon Telegraph and Telephone company.

5. ____________________ is a network of computers linked globally.
Ans: The Internet is a network of computers linked globally.

C. Write (T) for true statements and (F) for false statements.

1. A lighthouse helps ships to find the direction of an seaport. 
Ans: F       

2. The Penny Post Service began in England. 
Ans: T

3. A telephone is a portable instrument.
Ans: T

4. NGMN defines 5G network.
Ans: T

5. An e-mail is a source of information.
Ans: T

D. Match the columns A and B.

Ans:

Writing Zone

Answer the following questions.

1. What is communication?
Ans: Communication is the exchange of information, thoughts, feelings, and ideas between 
at least two people: the sender and the receiver.

2.  What was the Penny Post Service?
Ans: The Penny Post Service was a postal system introduced in Englandwhere messages could be sent through a horse rider by paying a penny. It marked the beginning of the postal system, using stamps to indicate payment.

3. Give two examples each of personal communication and mass w communication.
Ans: 

• Personal communication: Telephone, Postcard
• Mass communication: Television, Internet

4. How is a computer system useful to us?
Ans: A computer system is useful as it provides the fastest means of communication, allows online shopping, banking, and ticket booking. It is an integral part of the modern age, facilitating various tasks efficiently.

5. Write any two key features each for 1G, 3G and 5G mobile network.
Ans: 

• 1G:
  • Poor voice quality due to interference
  • Limited mobility and coverage
• 3G:
  • Higher data rate
  • Multimedia message support
• 5G:
  • Much higher data rate up to 1Gbps
  • Reduced latency for mission-critical applications