Physics-Important Points-One Liners 1-The process of heat transmission in the form of electromagnetic waves is called radiation. It does not require any medium for propagation. 2-A body that absorbs all the radiation incident on it is called a perfectly black body. 3-A force which changes the configuration of a body is called a deforming … Read more
Physics-Metallurgy-Important Points-One Liners 1-A mineral from which a metal can be extracted economically and conveniently is called Ore. 2-Roasting- It is a pyrochemical process in which the ore is heated in the presence of oxygen or air below its melting point. 3-Smelting: The process of reducing the oxide with coke is called smelting. … Read more
Physics-One Liners 1-Atom is the smallest particle that takes part in the chemical reaction. 2-Atoms of the same elements are identical in all aspects. 3-Mass is neither created nor destroyed during physical or chemical changes. This statement explains ‘The Law of Conservation of Mass’. 4-Thomson’s model of atom is … Read more
Light – Reflection Reflection of light-Laws 1- The angle of incidence is equal to the angle of reflection, and 2- The incident ray, the normal to the mirror at the point of incidence and the reflected ray, all lie in the same plane *Image formed by a plane mirror is always virtual and erect. … Read more
Physics Light 1-Light is a form of energy due to which we are able to see the objects. 2-Light rays consist of electromagnetic waves basically which do not require any material medium (like solid, liquid or gas) for their propagation. 3-The wavelength of visible light waves is very small. Blue light has a … Read more
[wds id=”1″] Physics 1-At what temperature are the temperature on Celsius and Fahrenheit scales equal? Ans= – 40o Celsius 2-Galvanometer can be converted into a voltmeter by using High resistance in series 3-Kilowatt – hour is a unit of Power 4-The ozone layer protects us from Ultra violet rays 5-Fire in the diesel engine … Read more
Physics – 1-Centrifugal force lead to separation of the cream from the churned milk. 2-If the radius of the Earth is made 1/4th, the duration of an year will become 1/8 times. 3-Soft iron form the core of transformer. 4-A geostationary satellite’s height above the earth’s surface is about the six times the radius … Read more
Physics A- Viscosity of liquids * The resistance offered by fluids (liquids as well as gases) to relative motion between its different layers is called viscous force. This property is called viscosity. * When two parallel layers of a liquid are moving with different velocities, they experience tangential forces which tend to retard the faster … Read more
Physics Electrical Conductivity Of Liquids 1-The phenomenon of flow of current through liquids is known electrolysis. 2-The phenomenon of flow of electrons through solids is known as conduction. 3-The phenomenon of flow of electrons through gases is known as discharge. 4-Pure water does not allow the … Read more
Physics Some Natural Phenomena 1-Crust -The uppermost layer of the earth is called Crust. 2-Earth’s plates -The outermost layer of the earth is not in one place.It is fragmented.Each fragment is called a plate.These plates are known as earth’s plates. 3-Earthquake-An earthquake is sudden shaking or trembling of earth … Read more