Magnetism
Bayani Gaba-gaba
Pick up two fridge magnets and you can feel an invisible force pulling them together or pushing them apart, depending on which way round you hold them. That same force guides compass needles, locks cupboard doors, and even steers charged particles streaming from the Sun away from Earth's surface.
In this lesson you will learn which materials respond to magnets and why, how to distinguish permanent magnets from induced ones, and how to map the invisible field that surrounds every magnet using compasses and field-line diagrams. These ideas underpin the electromagnetism topics that follow, and Edexcel tests them regularly on both Paper 1 and Paper 2.
Manufura
- Know that magnets repel and attract other magnets and attract magnetic substances
- Describe the properties of magnetically hard and soft materials
- Understand the term 'magnetic field line'
- Know that magnetism is induced in some materials when they are placed in a magnetic field
- Investigate the magnetic field pattern for a permanent bar magnet and between two bar magnets
- Describe how to use two permanent magnets to produce a uniform magnetic field pattern
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Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Magnetism. Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which of the following is NOT a magnetic material? A) Iron B) Cobalt C) Copper D) Nickel Answer: C
- What happens when two north poles are brought close together? A) They attract B) They repel C) Nothing happens D) They become demagnetised Answer: B
- Magnetic field lines around a bar magnet point: A) From south to north outside the magnet B) From north to south outside the magnet C) From north to south inside the magnet D) In random directions Answer: B
- A uniform magnetic field is represented by field lines that are: A) Curved and close together B) Straight and getting further apart C) Parallel and equally spaced D) Circular and concentric Answer: C
- Which of the following is the only sure test that an object is a magnet? A) It attracts iron filings B) It is attracted to a known magnet C) It is repelled by a known magnet D) It sticks to a fridge door Answer: C
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Magnetic Fields, Field Lines, and Force
Summarize properties of magnets and describe how some nonmagnetic materials can become magnetized
"Physics: Magnetic Fields, Field Lines, and Force" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/20-1-magnetic-fields-field-lines-and-force. Access for free at https://openstax.org/books/physics/pages/1-introduction
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Sashen littafi
Ferromagnets and Electromagnets
Only certain materials, such as iron, cobalt, nickel, and gadolinium, exhibit strong magnetic effects. Such materials are called ferromagnetic , after the Latin word for iron, ferrum . A group of materials made from the alloys of the rare earth elements are also used as strong and permanent magnets;
"College Physics: Ferromagnets and Electromagnets" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-physics/pages/22-2-ferromagnets-and-electromagnets. Access for free at https://openstax.org/books/college-physics/pages/1-introduction
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Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Magnetism? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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