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Magnetism

Gbogbo ọrọ náà

Magnets are part of everyday life, from fridge magnets to the motors inside your phone. Understanding magnetic fields, poles and induced magnetism is essential for the electromagnetism section that follows.

In this lesson you will learn how magnets interact, the difference between hard and soft magnetic materials, what magnetic field lines represent, how magnetism can be induced, and how to investigate and produce uniform magnetic field patterns.

Ebumnobi

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

Akọmọ Ojú-ẹkọ

Every magnet has a north pole and a south pole. Cut a magnet in half and you get two smaller magnets, each with its own north and south. The invisible region around a magnet where it exerts a force is called a magnetic field, and understanding how to map and use that field is the foundation of electromagnetism.

Ọ dị na ngwa Green Bridge

Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.

Akwụkwọ ndụmọdụ zuru oke nwere eserese

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Ọ dị na Android, Windows, macOS, na Linux

Ayẹwo Ẹkọ

Ekele diri gi maka imecha ihe karịrị na Magnetism. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

Like magnetic poles: A) Attract B) Repel C) Have no effect D) Neutralise Answer: B
Magnetic field lines go from: A) South to north B) North to south C) East to west D) Top to bottom Answer: B
Which material is magnetically soft? A) Steel B) Iron C) Copper D) Aluminium Answer: B
Induced magnetism is: A) Permanent B) Temporary C) Only in steel D) Caused by heat Answer: B
A uniform magnetic field has: A) Curved lines B) Parallel equally spaced lines C) No field lines D) Lines that cross Answer: B