Sanchaar Aadhaarbhoot Dhaancha

Class 7 Social Science · Chapter 19: Aadhaarbhoot Dhaancha: Bharat ke Vikaas ka Engine · NCERT Exploring Society: India and Beyond section 19.5

Seekho

Jab Zoya Madhya Pradesh se Tamil Nadu ki cousin ko voice note bhejti, bijli mobile tower chalaati, sandesh kheton ke neeche fibre cable se daudta, upgrah se takra sakta, aur data centre ke server se guzarkar doosre phone par aata. Sanchaar ne lamba safar kiya: sadiyon tak kabootar, harkaare aur ghudsavaar sandesh le jaate; Bharat ka pehla chhapa akhbaar Bengal Gazette 1780 mein; 1844 se telegraph bindu-rekha bhejta; telephone 1876 mein; All India Radio 1930 mein; phir computer, email, World Wide Web, smartphone aur 5G.

1895 mein Calcutta mein J. C. Bose ne dikhaaya betaar sanket deewaar paar karke ghanti baja sakte. Unhone shuruaati detector aur antenna banaaye par shaayad hi patent liya, to milta-julta upkaran patent karne waale Marconi zyaada prasiddh hue. Aaj Bharat mein lagbhag 116 crore betaar phone graahak aur duniya ka sabse sasta data; 1990 ke dashak mein call ₹17 prati minute tak. Sanchaar se chhaatra online padhte, aapda chetaavni jaati, e-commerce (online khareed-bech) aur e-shaasan (online sarkaari seva, jaise DigiLocker mein dastaavez) chalte.

Explore: ghatnaayein samay rekha par.

1. Bengal Gazette 1780 mein pehli baar chhapa. Marker wahaan.
2. J. C. Bose ne 1895 mein betaar sanket dikhaaye. Marker wahaan.

Yaad rakho

• Tower, fibre cable, upgrah aur data centre hamaare sandesh le jaate.
• Harkaaron se 5G tak sanchaar badla; J. C. Bose ne 1895 mein betaar sanket ki pahal ki.

Quick check

App par rail ticket book karke online bhugtaan kiska udaharan?

1. using communication infrastructure for e-commerce
2. a living root bridge
3. a horse courier
4. the telegraph

Socho

Bharat mein phone aur internet itna sasta kaise hua hoga?

Practice

Teen levels (easy, medium, hard) ke naye sawaalon se practice karo, kuch hands-on, hints aur hal ke saath. Topic poora karne ke liye pichhle 5 mein se 4 sahi karo.