January 2021

SOLAR SYSTEM DRAWING INTRODUCTION: If we look at the sky of the solar system drawing in a dark and clear night, we will notice that the entire sky dotted with countless stars, some bright and some not so bright . We must notice that the moon is the brightest objects in the night sky. The …

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  CALORIMETRY INTRODUCTION: Heat is a kind of energy that make a substance colder or hotter while temperature is the degree of hotness or coldness of a substance in calorimetry.  DEFINITION OF CALORIMETRY: It is a science of measurement which deals with heat and temperature. We know that one calorie of heat energy is defined …

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 CHEMICAL EFFECTS OF ELECTRIC CURRENT Introduction When electric current is passed through conducting liquids, then chemical changes take place. This is called chemical effects of electric current. So, it is important that we should know some new terms like, electrolyte, electrode and electrolytic cell. TERMS RELATED TO CHEMICAL EFFECTS OF ELECTRIC CURRENT: Electrolyte:  It is …

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              ANGLE OF FRICTION INTRODUCTION:   When one body moves over the surface of the other, the surface opposes the relative motion of the moving object. The opposing force is called frictional force in angle of friction. FACTORS AFFECTING FRICTIONAL FORCE: The nature of two surfaces and the force …

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LENS FORMULA INTRODUCTION It is a transparent refracting medium bounded by  two or at least one spherically curved surface in lens formula.  What is lens using in various device :In a microscope or in a telescope convex lenses are used to see distant or much closer objects. What is the type: Convex and Concave lens. …

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