Physics - 4PH1 PearsonEdexcel

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

Takardar Darasi

Long before anyone understood atoms or electrons, ancient Greeks noticed that a certain rock from the region of Magnesia could attract pieces of iron. Thousands of years later, we still describe forces that act without contact as 'magnetic'. Understanding which materials feel this pull, what happens inside them, and how the force spreads through space is the starting point for everything from electric motors to MRI scanners.

Akwai a cikin manhajar Green Bridge

Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.

Cikakkiyar bayanan darasi tare da zane-zane

Mataimakiyar koyo da AI

Yi karatu ba tare da intanet ba, a kowane lokaci, a ko'ina

Zazzage manhajar wayar hannu Zazzage manhajar kwamfyuta

Akwai a Android, Windows, macOS, da Linux

Nazarin Darasi

Barka da kammala darasi akan Magnetism. Yanzu da kuka bincika mahimman raayoyi da raayoyi, 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