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Aakarshan aur Pratikarshan

Class 6 Science · Chapter 4: Magnets ki Khoj · NCERT Curiosity section 4.4

Seekho

Rohan do bar magnets khilaune ki gaadiyon par rakhta hai. Ek ka N pole doosre ke S pole ke paas laane par gaadiyaan ek doosre ki taraf chalti hain. Ek gaadi ghumaakar N ko N ke saamne karne par gaadiyaan door chali jaati hain!

Alag poles attract karte hain (N aur S kheenchte hain). Ek jaise poles repel karte hain (N aur N, ya S aur S, door dhakelte hain). Ye kheench-dhakel bina chhue, kaagaz ya lakdi ke aar-paar bhi hoti hai.

N–S → attract · N–N, S–S → repel

Kaise pata karein dhaatu ki chhad sach mein magnet hai? Lohe ki chhad magnet ke dono poles se kheenchti hai. Par sirf magnet hi repel ho sakta hai. Isliye repulsion magnet ka pakka test hai.

Explore: magnets ko attract aur repel karao.

  1. Magnets ko repel karao.
  2. N ko S ke saamne rakhkar attract karao.

Yaad rakho

  • Ek jaise poles repel; alag poles attract.
  • Repulsion magnet ka pakka test hai: loha sirf kheenchta hai.

Quick check

Do magnets ek doosre ko door dhakelte hain. Kaunse sire aamne-saamne hain?

  1. Ek jaise poles (N–N ya S–S)
  2. Alag poles (N–S)
  3. Beech ke hisse
  4. Koi bhi sire
Answer

Ek jaise poles (N–N ya S–S). Ek jaise poles repel; alag poles attract.

Socho

Tumhare paas do ek jaisi dikhti chhadein hain. Ek magnet hai, doosri saadha loha. Bina kisi aur cheez ke, kaise pata karoge magnet kaunsa hai?

Ek answer

Chhad A ka sira chhad B ke beech mein lagao. Agar tez kheenche, to A magnet hai (magnet ke sire tez hote hain, lohe ki chhad ke beech mein kheench nahi). Agar kam kheenche, to B magnet hai: uska beech kamzor hai, aur A ka sira saadha loha 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.