Gadgets and Instruments:

Fan, air conditioners, sewing machines, power tools, cars, trains, aeroplane engines, induction motors, telescopes, Bavarian glass, microscopes, electrical generators, light bulbs. Now you add to the list of gadgets and instruments. You can add your own too.

1. Microscope: It is an instrument used to see objects that are too small to be seen by the naked eye. Antonie Van Leeuwenhoek (1632-1723), a Dutch scientist, who in the late 17th century became the first man to make and use a real microscope. All microscopes came with a lens that can magnify 40 times the normal size.

2. Electrical generator: It was invented by Michael Faraday in 1831. It is a device that converts mechanical energy into electrical energy. Sources of mechanical energy include steam, turbines, gas turbines, water turbines, etc. It works on the principle of electromagnetic induction.

3. Fan: A fan is a machine used to create flow within a fluid, typically a gas such as air. The fan consists of a rotating arrangement of blades which act on the fluid. The fan was invented by Schuyler Skaats Wheeler in 1882.