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Switches

Switching on the radio
Switching on a light by a wall switch
Switching on the cooker
Switching on a computer
Switching on an electric toothbrush
Switching on a TV
Switching on a light by a pull cord





These are just a few of the uses of switches in your homes.

There are many different ways in which a switch can be turned on or off. Here are some of them:

(a) person light switch
(b) light street lights
(c) infra red beam - TV or stereo remote control
(d) movement security light
(e) heat security light
(f) sound controls for disabled people
(g) electronic turning off a computer by clicking the mouse
(h) touch touch sensitive table lamp
(i) ultrasonic beam car reversing impact warning
(j) pressure seat belt warning light

Think about the different sorts of switches in your home
(a) ordinary ON-OFF switch
(b) dimmer switch use it to turn lights on and off and control how bright they are
(c) timer switch it goes off after a certain time controlled by electronics or a spring


These switches all control electricity but what about a water tap, that is a kind of switch but this time it controls not electricity but water.
 

A VERSION IN WORD IS AVAILABLE ON THE SCHOOLPHYSICS USB
 
 
 
© Keith Gibbs 2020