Dangers of Electricity
Physics: Cambridge International GCSE Supplement, topic 4.10.1
Dangers of Electricity
Electricity can be dangerous, so we must be cautious and safe around it. Electricity passing through the human body causes an electric shock. This damages the body and can be deadly. Some risk factors are:
Damaged insulation
- Insulation on wires stops electricity from passing from the wires to a person touching the wire.
- If the insulation is damaged a person may touch the wire itself and get an electric shock.
Damp conditions
- Water can conduct electricity.
- If conditions are damp, it is possible for currents to flow through the water to a person using a device. This gives the person an electric shock.
Overheating
- If cables or wires carry more current than they are designed for, they can overheat and can cause a fire.
Overloading
- Overloading occurs when too many appliances are connected to plugs, extension leads, or sockets.
- Excess current causes wires to overheat, which may damage equipment or start fires.
- High-power appliances (e.g. heaters, kettles) are especially risky when used together.
- Fuses and circuit breakers protect circuits by cutting off the supply if current is too high.
Test yourself on Dangers of Electricity
Which of these are safe to work with?
Why are these electrical conditions dangerous?