1. Answer briefly:
(1) What are communication devices?
Ans. The devices which
help us to communicate are known as communication devices. Eg : Mobile,
Computer.
(2)Which are the sources of information?.
Ans. The sources of
information are Printing press, Xerox Machine, Fax Machine, Post Office, radio
and television.
(3)Explain the following:
(i) E- Mail :
Electronic mail is used for sending, receiving and writing messages through
internet.
(ii) Teleconferencing:
Teleconferencing is uses telephone lines to connect two or more computers and
modem, for holding a meeting between
people in remote areas or workplaces.
2.
Answer in one sentences:
(1) What is the use of fax machine?
Ans. Fax machine can
send pictures or text over telephone line quickly.
(2) Who invented telephone?
Ans. Alexander Graham
Bell invented the telephone.
(3) What is
internet?
Ans. The internet is a
worldwide system of computer networks in which user at any one computer can get
information from any other computer.
(4) What is the use of
ATM?
Ans. ATM (Automated
teller Machine) is used to withdraw money any time without going to bank.
3. Fill in the
blanks.
(1) Instead of printed
books ebooks are available.
(2)SMS and MMS can be
sent through mobile phone.
(3)Short messages can
be send through email.
4.
Match the following:
Group ‘A’ Ans.
(1)
Microprocessor Chip : Intel
(2)
First telegraph message : Samuel Morse.
(3)
First dictionary : Webster
(4)
Sound Recording : Thomas Edison
