Cells, Batteries, Generators And Motors
Gbogbo ọrọ náà
Move a magnet near a coil of wire and a voltage springs up out of nowhere; send a current through a wire and it becomes wrapped in a magnetic field; place that wire in another magnet's field and it is pushed sideways. Electricity and magnetism are two sides of one coin, and this link runs every generator, motor, relay and loudspeaker.
In this topic you will learn how a changing magnetic field induces an e.m.f., what affects its size and direction, the magnetic field patterns around wires and solenoids, and how a simple a.c. generator works. You will also relate the directions of force, field and current, and see the magnetic effect of a current applied in relays and loudspeakers.
Ebumnobi
- [Core] Know that cells and batteries transfer chemical energy into electrical energy
- [Core] Know that generators transfer kinetic energy into electrical energy
- [Core] Know that electric motors transfer electrical energy into kinetic energy
Akọmọ Ojú-ẹkọ
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.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Cells, Batteries, Generators And Motors. 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.
- An e.m.f. is induced in a coil when: A. a magnet rests inside it B. the magnetic field through it changes C. it is painted black D. it is at a high temperature Answer: B
- Which change does NOT increase the e.m.f. induced in a coil? A. moving the magnet faster B. using more turns C. using a stronger magnet D. holding the magnet still Answer: D
- The magnetic field around a long straight current-carrying wire is: A. straight lines along the wire B. concentric circles around the wire C. a uniform field D. zero Answer: B
- In a simple a.c. generator the induced e.m.f. is greatest when the coil is: A. vertical B. horizontal C. at rest D. removed Answer: B
- The force on a current-carrying wire in a magnetic field is found using: A. the right-hand grip rule B. Fleming's right-hand rule C. Fleming's left-hand rule D. Ohm's law Answer: C
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.
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.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Cells, Batteries, Generators And Motors? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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