Magnetic aur Non-magnetic Padaarth
Class 6 Science · Chapter 4: Magnets ki Khoj · NCERT Curiosity section 4.1
Seekho
Divit ke fridge par rangeen magnets uski drawings thaame hain. Wo sochta hai: magnet aur kis cheez se chipkega? Wo magnet lekar ghar bhar mein jo mile sab test karta hai.
Magnet loha (iron), nickel aur cobalt se bani cheezon ko kheenchta (attract karta) hai. Steel mein loha hai, isliye steel ki pins aur clips bhi kheenchti hain. Ye magnetic padaarth hain. Lakdi, plastic, kaanch, rubber, kaagaz, kapda, aluminium aur taamba non-magnetic hain.
Dhyaan do: har chamakdaar dhaatu magnetic nahi hoti! Aluminium ka dabba aur taambe ka taar dhaatu hain par nahi kheenchte. Andaaza mat lagao, test karo.
Bahut pehle logon ko ek prakritik patthar mila jo loha kheenchta tha. Ise magnetite (lodestone) kehte hain. Aaj zyaadatar magnet factory mein bante hain, kai shapes mein: bar, ghode ki naal, ring, disc aur zyada.
Explore: apne magnet se cheezein test karo.
- Har cheez sort karo: kya magnet se chipakti hai?
Yaad rakho
- Magnet loha, nickel, cobalt (aur steel) kheenchte hain. Ye magnetic padaarth hain.
- Har dhaatu magnetic nahi: aluminium aur taamba nahi.
Quick check
Magnet inme se kise kheenchega?
- Steel ka chammach
- Taambe ka sikka
- Plastic ki bottle
- Rubber band
Answer
Steel ka chammach. Steel mein loha hai, jo magnetic hai. Taamba, plastic aur rubber nahi.
Socho
Kabir ki steel pins ki dibbi ret mein gir gayi. Wo unhe jaldi kaise nikaale?
Ek answer
Ret mein magnet ghumaao. Steel ki pins chipak jaayengi, ret nahi, kyunki ret non-magnetic hai.
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.