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Hazards with Electricity

In this worksheet, students will learn about the correct use of electricity.

'Hazards with Electricity' worksheet

Key stage:  KS 3

Curriculum topic:   Physics: Electricity and Electromagnetism

Curriculum subtopic:   Current Electricity

Difficulty level:  

Worksheet Overview

Electricity can be very dangerous if not used properly. At home, mains electricity is used, which has a much higher voltage than the cells used at school. It can be extremely dangerous.

 

The general safety rules when handling electricity are:

 

- Never touch the metal parts of plugs (see a plug inserted into a socket in the diagram)
- Never poke things into sockets
- Keep water away from electrical appliances (water is a conductor of electricity).


Plug in socket

 

In science lessons:

 

- Always show your circuits to your teacher before switching them on
- Switch the current off before changing your circuit.

 

Electricity can be controlled by using a switch. When the switch is open, there is a gap in the circuit, so electric current cannot flow. When we close the switch there is a complete circuit for the current to flow around. The diagram shows a complete circuit with an open and then a closed switch. In science, we call the battery a cell, but actually a battery consists of many cells in a row.

 

 

 

All wires are metal because metals conduct electricity, but they are covered in plastic to insulate us from the electricity and so avoid accidents. Have a look at the wires this plug contains:

 

 

Wired plug

 

 

You can see the multi-coloured wires for Earth (yellow/green), Live (brown) and Neutral (blue).  As almost all appliances come with a fitted and sealed plug, it's not as vital to learn how to wire a plug as it once was.

 

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