Mains Electricity
Bayani Gaba-gaba
Every time you plug in a kettle, charge a phone, or switch on a lamp, you rely on a system designed to deliver energy safely. The UK mains supply provides 230 V of alternating current at 50 Hz, and understanding how that power reaches your appliance, how the wiring inside a plug is arranged, and what protects you from a fault is essential knowledge for both your exam and everyday life.
This topic takes you inside the three-pin plug, explains why fuses and circuit breakers exist, shows you how to calculate electrical power and energy transferred, and clarifies the difference between alternating and direct current. You will practise selecting the right fuse for an appliance and solving energy-transfer problems using the equations examiners expect.
Manufura
- Understand how the use of insulation, double insulation, earthing, fuses and circuit breakers protects the device or user in a range of domestic appliances
- Understand why a current in a resistor results in the electrical transfer of energy and an increase in temperature, and how this can be used in a variety of domestic contexts
- Know and use the relationship between power, current and voltage: power = current x voltage, P = I x V, and apply the relationship to the selection of appropriate fuses
- Use the relationship between energy transferred, current, voltage and time: energy transferred = current x voltage x time, E = I x V x t
- Know the difference between mains electricity being alternating current (a.c.) and direct current (d.c.) being supplied by a cell or battery
Takardar Darasi
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.
Nazarin Darasi
Barka da kammala darasi akan Mains Electricity. 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.
- What colour is the live wire in a UK three-pin plug? A) Blue B) Green and yellow C) Brown D) Red Answer: C
- The UK mains electricity supply has a frequency of: A) 50 V B) 230 Hz C) 50 Hz D) 230 V Answer: C
- A 460 W appliance is connected to the 230 V mains supply. What fuse should be used? A) 1 A B) 3 A C) 5 A D) 13 A Answer: B
- Which safety device can be reset after it trips? A) Fuse B) Earth wire C) Circuit breaker D) Double insulation Answer: C
- An appliance that is double insulated does not need: A) A live wire B) A neutral wire C) A fuse D) An earth wire Answer: D
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.
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.
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Mains Electricity? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
