Class 6 Science · Chapter 4
Short answer: Class 6 Science Curiosity Chapter 4 'Exploring Magnets' NCERT solutions — poles, magnetic/non-magnetic materials, compass, aur magnet banane ke tareeke, sab step-by-step Hinglish explanations ke saath.
Chapter 4 Class 6 Science Curiosity ka naam hai Exploring Magnets, aur yeh chapter bachon ko ek aisi force se introduce karta hai jo dikhti nahi lekin mehsoos hoti hai — magnetism. Bachpan se hum log fridge magnets aur khilonon me magnet ka use dekhte aaye hain, par yeh chapter unke peeche ke science ko explain karta hai — poles kya hote hain, kaunse materials magnetic hote hain, aur Earth khud ek giant magnet kaise hai. Jaise Class 10 Chemistry me Chapter 1 poori neev banata hai, waise hi yeh chapter Class 6 ke baaki physical science concepts (jaise force, electricity) ke liye foundational hai.
Chapter 4 Summary — 5 Minute Revision
Chapter 4 'Exploring Magnets' Class 6 Science Curiosity book ka ek foundational chapter hai jo magnetism ki basic understanding banata hai — lodestone ki history se lekar modern compass tak. Key takeaways: har magnet ke do poles hote hain (N aur S), like poles repel karte hain jabki unlike poles attract karte hain, sirf iron/nickel/cobalt jaise materials hi magnetic hote hain, aur Earth khud ek natural giant magnet hai jiski wajah se freely suspended magnet hamesha North-South align hota hai. Yeh concept aage Class 6-8 me electricity aur electromagnetism ke topics ke liye base banata hai, isliye ise thoroughly samajhna zaroori hai — na ki sirf ratt-lena.In-Text Questions — Solutions
Try This: Bring the two ends of two bar magnets close to each other one pair at a time. Note down your observations. Why does this happen?
Jab dono magnets ke same poles (N-N ya S-S) ek doosre ke paas laaye jaate hain, toh woh ek doosre ko push (repel) karte hain — haath me halka sa dhakka mehsoos hota hai.
Jab dono magnets ke opposite poles (N-S) ek doosre ke paas laaye jaate hain, toh woh ek doosre ki taraf khinch (attract) jaate hain aur chipak jaate hain.
Reasoning: Yeh magnet ki fundamental property hai — like poles repel, unlike poles attract. Yeh isliye hota hai kyunki har magnet ke around ek invisible magnetic field hota hai, aur do fields ke interaction se hi yeh force generate hoti hai.
Curiosity box: Lodestone kya hai aur iska history se kya connection hai?
Lodestone (jise Hindi me 'maqnatis pathar' bhi kehte hain) ek naturally occurring magnetic rock hai jo iron oxide se bani hoti hai aur khud hi magnetic properties rakhti hai.
Historically, ancient Greeks aur Chinese sailors ne notice kiya ki yeh stone iron particles ko attract karta hai aur agar isse latkaya jaaye toh yeh hamesha North-South direction me align hota hai. Isi observation se hi magnetic compass ka invention hua, jo navigation me revolutionary badlav laaya.
Activity: Sort household items into magnetic and non-magnetic categories using a bar magnet.
Method: Ek bar magnet lo aur ghar ki alag-alag cheezon (nail, spoon, eraser, coin, pin, plastic button, key) ke paas le jao, aur note karo kaunsi cheez attract hoti hai.
Observation pattern: Iron aur steel se bani cheezein (nail, safety pin, steel spoon) attract hongi. Plastic, rubber, wood, aur most coins (jo copper/aluminium alloy ke hote hain) attract nahi hongi.
Learning: Yeh activity sikhaati hai ki magnetism sirf kuch specific materials (iron, nickel, cobalt) ki property hai, na ki har 'metal' ki.
Exercise Questions — Solutions (Q1–Q6)
Fill in the blanks: (a) Like poles of a magnet ______ each other, while unlike poles ______ each other. (b) A freely suspended bar magnet always aligns itself along the ______ direction. (c) A magnetic compass is used to find ______ directions.
Working:
(a) Like poles repel each other, unlike poles attract each other — yeh property magnets ki sabse basic property hai jo chapter ke shuru me activity ke through establish hoti hai.
(b) A freely suspended bar magnet always aligns itself along the North-South direction, kyunki Earth khud ek huge magnet ki tarah behave karti hai aur magnet ke poles Earth ke magnetic poles ki taraf point karte hain.
(c) A magnetic compass is used to find geographic (North-South-East-West) directions — sailors, trekkers aur pilots isi principle ka use karte the modern GPS se pehle.
Meena did the following activity. She took a bar magnet and marked its ends as A and B. She then tied a thread in its middle and suspended it freely. She noted that end A always came to rest towards the north direction. What can you conclude about end A? Also name the magnetic property being demonstrated here.
Step 1 — Observation samjho: Meena ka magnet jab freely thread se latakta hai (bina kisi doosre magnet ya iron object ke paas), toh woh khud North-South direction me settle ho jaata hai. Yeh koi coincidence nahi hai.
Step 2 — Reasoning: Earth ek giant natural magnet ki tarah behave karti hai, jiska magnetic North pole approximately geographic North ke paas hai. Freely suspended magnet ka jo pole North direction me point karta hai, use uska North-seeking pole (N-pole) kehte hain.
Conclusion: End A = North pole (N-pole) of the magnet, kyunki woh consistently North direction me rest kar raha hai. End B automatically South pole (S-pole) hoga.
Property demonstrated: Directional property of a freely suspended magnet — yehi principle magnetic compass ke design me use hota hai.
List any four materials that are attracted by a magnet and any four that are not, from things found in your home.
Magnetic materials (magnet se attract hote hain):
- Iron nail / lohe ki kil
- Steel spoon
- Safety pin (steel)
- Iron almirah ka door
Non-magnetic materials (magnet se attract nahi hote):
- Plastic scale
- Wooden pencil
- Aluminium foil / bartan
- Glass tumbler
Reasoning: Sirf iron, nickel, cobalt jaise kuch specific metals hi magnetic properties dikhate hain — inhe magnetic materials kehte hain. Baaki sab (wood, plastic, glass, rubber, aluminium, copper) non-magnetic materials hain, chahe woh metal hi kyun na ho (jaise aluminium, copper).
Describe, with the help of a labelled diagram description, how you can make a magnet using a bar magnet and an iron nail by the single-touch method.
Method — Single Touch Method (step-by-step):
1. Ek iron nail (jo abhi magnet nahi hai) table par rakho.
2. Ek bar magnet ka ek pole (maan lo N-pole) nail ke ek sire par rakho.
3. Magnet ko nail ki poori length par ek hi direction me — nail se hata kar phir wapas shuru se — baar-baar (20-30 baar) ghisao, hamesha same direction me.
4. Magnet ko har baar nail se poori tarah uthakar wapas starting point par le jao (beech me touch mat karo return karte waqt).
Result: Nail ka woh end jahan se stroke shuru hua tha, magnet ke touching pole ke opposite polarity ka pole ban jaata hai. Nail ab temporary magnet ban jaati hai jo halke iron pins/pieces ko attract kar sakti hai.
Note: Yeh temporary magnetism hai — girane ya heat karne se kam ho sakti hai.
Why should magnets not be kept near mobile phones, TV, or computers? Explain with reasoning.
Reasoning: Magnets ek strong magnetic field create karte hain jo apne aas-paas ki jagah me phaila hota hai.
1. Mobile phones, TVs (purane CRT type), aur computers me chhote-chhote magnetic components hote hain (jaise speakers, hard disks purane models me) jo data store karte ya sound produce karte hain.
2. Jab koi strong external magnet inke paas laya jaata hai, toh uska magnetic field in components ke internal magnetic arrangement ko disturb kar sakta hai.
3. Isse data loss, screen distortion, ya permanent damage ho sakta hai — khaas kar purane storage devices (floppy disks, magnetic hard drives, credit card ki magnetic strip) me.
Conclusion: Isliye magnets ko electronic devices aur magnetic strip wale cards se door rakhna chahiye.
A student has two identical-looking iron bars. One is a magnet and the other is a simple (non-magnetic) iron bar. Without using any other magnet, suggest a method (with reasoning) to identify which one is the magnet.
Method — End-touch Test:
1. Bar A ko fix rakho (table par), aur Bar B ko uske ek end (say middle) se touch karo Bar A ke ek end par.
2. Ab Bar B ke doosre end ko Bar A ke centre (middle) par touch karke dekho.
Reasoning:
Agar Bar A magnet hai: uske poles (ends) sabse strong attraction dikhate hain aur middle (centre) me attraction bahut kam ya zero hota hai — kyunki magnetic force poles par concentrate hoti hai.
Agar Bar A simple iron bar hai (non-magnetic): toh dono ends aur middle par attraction roughly same rahega — kyunki attraction Bar B (jo actual magnet hai) ki taraf se ho raha hai, aur simple iron uniformly attract hota hai poori length par.
Conclusion: Jis bar ke ends par attraction strong ho aur middle par kam ho jaaye, wahi asli magnet hai.
Important Equations — Ek Nazar Me
| Concept | Rule / Statement |
|---|---|
| Like poles | N-N ya S-S ek doosre ko repel karte hain |
| Unlike poles | N-S ek doosre ko attract karte hain |
| Magnetic materials | Iron, Nickel, Cobalt — magnet se attract hote hain |
| Non-magnetic materials | Wood, Plastic, Glass, Aluminium, Copper — attract nahi hote |
| Directional property | Freely suspended magnet hamesha North-South direction me rest karta hai |
| Strongest attraction point | Magnet ke poles (ends) par attraction sabse zyada; middle me sabse kam |
| Single touch method | Iron bar ko ek magnet pole se ek hi direction me baar-baar stroke karna → temporary magnet banta hai |
↔ Table ko side me swipe karein
Common Mistakes — Yahan Marks Kat te Hain
- Yeh sochna ki har metal magnet se attract hota hai — jabki sirf iron, nickel, cobalt hi magnetic materials hain, aluminium/copper nahi.
- N-pole aur S-pole ko sirf 'North side' aur 'South side' samajh lena, jabki yeh magnet ka property hai jo direction se independent hoti hai jab tak magnet freely suspend na ho.
- Like poles ko attract aur unlike poles ko repel bolna — yeh exactly ulta hai (like repel, unlike attract).
- Magnet ke middle part ko bhi poles jitna strong samajhna — jabki attraction sirf ends (poles) par sabse zyada hoti hai.
- Compass needle North ki taraf point karti hai isliye use 'South pole' bol dena — jabki jo end North point karta hai woh magnet ka North-seeking (N) pole hota hai.
- Single-touch method me magnet ko baar-baar ek hi direction me stroke karne ke bajaye aage-peeche (dono directions me) ghisna — jisse proper magnetization nahi hoti.
Board-Style Important Questions
- Explain why a freely suspended bar magnet always points in the North-South direction — based on text discussion / school-level assessment pattern
- State the rule for attraction and repulsion between magnetic poles, with a labelled diagram-based explanation — common short-answer format in school tests
- Differentiate between magnetic and non-magnetic materials with two examples each — typical fill-in/short-answer style question
- Describe the single-touch method of making a magnet from an iron bar, step by step — common practical/activity-based question in school exams
- How can you identify the poles of an unmarked magnet using a magnetic compass? — application-based question style seen in periodic assessments
Aksar Poochhe Jaane Wale Sawaal
Class 6 Science Curiosity chapter 4 Exploring Magnets me kaunse topics cover hote hain?
Is chapter me magnets ki history (lodestone/maqnatis stone), magnetic aur non-magnetic materials, magnet ke poles, like-unlike poles ka attraction-repulsion rule, magnetic compass, Earth ka magnetism, aur magnet banane ke tareeke (single touch method, double touch method, electromagnet ka basic idea) cover hote hain.
NCERT Class 6 Science Curiosity chapter wise notes kahan milenge?
NCERT Class 6 Science Curiosity chapter wise notes — jisme Chapter 1 The Wonderful World of Science se lekar Chapter 12 Beyond Earth tak — is series ke doosre solution pages par step-by-step provide kiye jaate hain, har chapter ka apna dedicated summary aur Q&A set hota hai.
Kya magnet har metal ko attract karta hai?
Nahi. Magnet sirf iron, nickel, aur cobalt jaise specific metals ko attract karta hai — inhe magnetic materials kehte hain. Aluminium, copper, aur brass jaise metals magnet se attract nahi hote, isliye woh non-magnetic materials ki category me aate hain.
Magnetic compass kaise kaam karta hai?
Magnetic compass ke andar ek chhoti freely-suspended magnetic needle hoti hai. Earth khud ek natural magnet ki tarah behave karti hai, isliye needle hamesha North-South direction me align ho jaati hai — needle ka N-pole geographic North ki taraf point karta hai, jisse directions pata chalti hain.
Kya magnet apni power hamesha ke liye rakhta hai?
Natural aur strong permanent magnets (jaise steel se bane) apni magnetism lambe time tak rakhte hain, lekin agar unhe giraya jaaye, heat kiya jaaye, ya galat tarike se store kiya jaaye (jaise dono poles ek saath bina keeper ke), toh unki magnetic strength kam ho sakti hai. Temporary magnets (soft iron se bane) apni magnetism jaldi kho dete hain.
Class 6 Science Curiosity book purane NCERT syllabus se kaise different hai?
2026-27 session ki rationalised Curiosity book me chapters ka naming aur sequencing purane NCERT se different hai — jaise purane 'Motion and Measurement of Distances' ab 'Measurement of Length and Motion' ban gaya hai, aur activity-based, competency-focused approach zyada emphasize kiya gaya hai purani textbook-heavy definitions ki jagah.
Class 6 Science — Saare Chapters
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