Mains Electricity
Gbogbo ọrọ náà
The electricity that powers your home, school and workplace arrives through the mains supply. It is far more powerful than a battery, which is why every plug and appliance includes safety features designed to prevent electric shock and fire.
In this lesson you will learn the difference between a.c. and d.c., how the UK mains supply works, why plugs have three pins, how fuses and circuit breakers protect you, and how to calculate electrical power and energy transferred using the equations P = IV and E = Pt.
Ebumnobi
- Know and use the relationship between power, current and voltage: P = I x V
- Know the difference between mains electricity being alternating current (a.c.) and direct current (d.c.) being supplied by a cell or battery
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 Mains Electricity. 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.
- Mains electricity in the UK is: A) D.C. at 12 V B) A.C. at 230 V C) D.C. at 230 V D) A.C. at 12 V Answer: B
- The live wire in a three-pin plug is coloured: A) Blue B) Green and yellow C) Brown D) Red Answer: C
- A fuse protects a circuit by: A) Increasing the resistance B) Melting and breaking the circuit when current is too high C) Reducing the voltage D) Reversing the current direction Answer: B
- A double-insulated appliance does not need: A) A plug B) A live wire C) An earth wire D) A neutral wire Answer: C
- P = IV. A 460 W appliance on 230 V draws a current of: A) 0.5 A B) 2 A C) 20 A D) 105 800 A Answer: B
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 Mains Electricity? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
Dawunlodi Ẹpp naa lori Google Playstore.
Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
