A TV is an electronic device which produces audio and visual effect simultaneously. It is not only a means of entertainment but also a great source of education. TV’s are of two types: Black and white and colour. Colour TV functions quite like a blacke and white TV set its working is much more complex…. [… More info ..]
Cellular telephone or radio telephone is a type of mobile telephone which is integrated with existing telephone system, allowing mobile users to contact any one with a standard telephone and vice-versa…. [… More info ..]
Usually when solids are heated they melt and becomes liquid. Then on further heating the liquid boils to form a gas. When we keep a piece of ice in a dish it melts and the water so formed evaporates after sometime. However there are some substances which on heating directly turn into gases from solids…. [… More info ..]
Binoculars are a pair of small telescopes built into a frame or casting. The twotelescopes in binoculars are exactly similar in structure and meant for each eye. Each telescope is built into a funnel-shaped tube or cylinder…. [… More info ..]
According to Bernoulli’s effect in any small volume of space through which a fluid is flowing steadily the total energy comprising the pressure gravitational potential and kinetic energy is always constant. In fact this theory propounds the law of conservation of energy for flowing fluids…. [… More info ..]
Bar code is computerized information encoded in a pattern of black and white srtips. The black and white lines represent 1’s and 0’S and can be read by light. hey carry encoded information- from the membership number of a sports club to the price and stock number of a packet of washing powder in a supermarket….. [… More info ..]
ost large planes have an autopilot. This is a device operated by a computer. It will fly the place without the pilot’s touching the controls. The principle of an automatic pilot is similar to the automatic steering of ships….. [… More info ..]
A battery is a device that produces electricity by chemical action. A battery contains one or more units called cells and each cell can produce current. There are main types of dry cell batteries: Carbon-zinc, alkaline and mercury…. [… More info ..]
A test-tube baby is no different from any other baby. But instead of beginning to grow inside its mother’s womb, it begins its life outside, in a special glass dish called a test-tube. An ovum (egg) is taken from the woman and is fertilized with the man’s sperm in a dish……. [… More info ..]
Ordinary water does not remove dirt from things because grease and water do not mix. So soap is one of the most common cleansing agent used all over the world. People use soaps and detergents to clean their skin, clothes, utensils and many other objects…. [… More info ..]
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