Chapter 4: Magnets ki Khoj
Magnet bina chhue loha kheench sakte hain, uttar disha dikha sakte hain, aur ek doosre ko door dhakel sakte hain. Is chapter mein hum jaanchenge magnet kin padaarthon ko kheenchte hain, magnet ke poles dhoondhenge, magnet se disha dhoondhenge, aur aakarshan-pratikarshan khojenge.
Is chapter mein tum
- magnetic aur non-magnetic padaarth sort karna
- magnet ke poles dhoondhna
- magnet se disha dhoondhna aur compass banana
- aakarshan aur pratikarshan samjhaana
Topics
- Magnetic aur Non-magnetic Padaarth NCERT 4.1
Magnet loha, nickel, cobalt (aur steel) kheenchte hain. Ye magnetic padaarth hain.
- Magnet ke Poles NCERT 4.2
Har magnet ke do poles, N aur S, hote hain jahan kheench sabse tez hai.
- Disha Dhoondhna NCERT 4.3
Khula latka magnet hamesha uttar–dakshin rukta hai.
- Aakarshan aur Pratikarshan NCERT 4.4
Ek jaise poles repel; alag poles attract.
- Magnets ke Saath Masti NCERT 4.5
Magnets kai roz ki cheezon mein use hote hain, pencil box se maglev train tak.
Key words
- Magnetic material
- magnet se kheenchne wala padaarth (loha, nickel, cobalt)
- Poles
- magnet ke sire jahan kheench sabse tez
- Compass
- khule ghoomne wali magnetic sui jo disha dikhaati hai
- Attraction
- kheenchna
- Repulsion
- door dhakelna
Summary
- Magnet loha, nickel aur cobalt kheenchte hain; ye magnetic padaarth hain.
- Har magnet ka north aur south pole hota hai.
- Khula latka magnet uttar–dakshin rukta hai; compass isi ka upyog karta hai.
- Ek jaise poles repel aur alag attract karte hain; repulsion magnet ka pakka test hai.