Electrical Safety
Bayani Gaba-gaba
The mains supply that powers your home is useful and dangerous in equal measure. A frayed cable, a damp room or an overloaded socket can cause a shock or a fire, so every house and appliance is built with layers of protection you may never notice.
In this lesson you will learn the hazards of mains electricity and the safety features that guard against them: the three wires of a mains circuit, why the switch and fuse go in the live wire, how fuses and trip switches work, and why appliances are earthed or double-insulated.
Manufura
- [Core] Describe the heating effect of current
- [Core] State the hazards of: (a) damaged insulation (b) overheating cables (c) damp conditions (d) excess current from overloading of plugs, extension leads, single and multiple sockets when using a mains supply
- [Core] Explain the use and operation of trip switches and fuses and choose appropriate fuse ratings and trip switch settings (knowledge of RCDs (Residual Current Devices) is not required)
- [Core] Explain why the outer casing of an electrical appliance must be either non-conducting (double-insulated) or earthed
Darasin Sauti
Saurari wannan darasi a cikin manhaja
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Electrical Safety. 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.
- A switch must be connected in the live wire so that, when off: A. the appliance still works B. the appliance is disconnected from the live voltage C. the neutral is broken D. the earth is connected Answer: B
- A fuse protects a circuit by: A. increasing the current B. melting and breaking the circuit if the current is too high C. earthing the case D. storing charge Answer: B
- Which is NOT a hazard of mains electricity? A. damaged insulation B. overheating cables C. a correctly rated fuse D. damp conditions Answer: C
- An appliance with a plastic case that needs no earth wire is: A. earthed B. double-insulated C. unfused D. short-circuited Answer: B
- An appliance normally draws 9 A. The most suitable fuse is: A. 3 A B. 5 A C. 13 A D. 1 A Answer: C
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Electrical Safety? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
