Mains Electricity
Akopọ
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.
Awọn Afojusun
- 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
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Mains Electricity. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- 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
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Mains Electricity? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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