Unit 2 — Electricity and Magnetism

Science — Third Preparatory

2.4 Electrical safety

Comparison aspect	Main idea	Keywords
Avoid overloading	do not plug several high-power appliances into one socket the large current can overheat the wires and cause a fire	plugseveralhighpower
Insulation	wires must be properly insulated so that you cannot get a shock	wiresmustproperlyinsulated
Dryness	make sure hands wires and components are dry tap water conducts electricity	makesurehandswires
Disconnect the source	before changing anything in a circuit	beforechanginganythingcircuit
Never use household mains	in school experiments use batteries	schoolexperimentsbatteries

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