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Ques : What is the force between two small charged spheres having charges of 2 × 10−7 C and 3 × 10−7 C placed 30 cm apart in air? Ans : Repulsive force of magnitude 6 × 10−3 N   Charge on the first sphere, q1 = 2 × 10−7 C   Charge on the second sphere, q2 = 3 × 10−7 C   Distance between the spheres, r = 30 cm = 0.3 m Electrostatic force between the spheres is given by the relation   where, 𝜀0 = Permittivity of free space and 1/ 4𝜋𝜀 = 9 × 10^9 Nm² C −2  Therefore, force   Hence, force between the two small charged spheres is 6 × 10−3 N.  The charges are of same nature. Hence, force between them will be repulsive.

                                                  CHAPTER - 3                           YOGA AND LIFESTYLE Meaning of asana   To sit in a comfortable position for everlasting period of time is called asana.  Asanas as preventive measure Asana can be preventive measures as they provide following physiological benefits which ultimately helps in avoiding various lifestyle disease. The following are the benefits of asana for prevention of diseases :  a) Bones and joints become strong : By performing regular asana, the bones, cartilages, and ligaments become strong. Along with this, height of children is enhanced .  b) Circulation of blood becomes normal : By performing asana regularly, the stroke volume as well as cardiac output increases because cardiac muscles start working more strongly and efficiently. Blood circulation becomes proper and blood pressure normalizes and stabilizes.   c) Immune system is strengthened : By regular practice of asana, our immune system is strengthene

                             CHAPTER - 2               SPORTS AND NUTRITION Key Points :   ●  Balanced Diet and Nutrition: Macro and Micro Nutrients.  ●  Nutritive and Non-nutritive components of diet  ●  Eating for weight control - A healthy weight, the Pitfall of dieting, Food Intolerance and Food Myths.  ●  Sports Nutrition& its Effects on performance (Fluid & Meal in take, pre, during and post Competition).  ●  Food Supplements for children  Balanced diet   A diet which contains the proper amount of each nutrient, i.e. like carbohydrate, fat, protein etc. is called Balanced Diet. A diet which consists of all the essential food constituents’ viz. protein, carbohydrates, fats, vitamins, minerals and water in correct proportion is called balanced diet. A balanced diet contains sufficient amounts of fiber and the various nutrients (carbohydrates, fats, proteins, vitamins, and minerals) to ensure good health. Food should also provide the appropriate amount of energy and ad

                                                       CHAPTER - 1                                          PLANNING IN SPORT Meaning and objectives of planning:  Planning is an intellectual process of thinking in advance about setting of goals and developing strategies which are requires to attain the goals efficiently.  Meaning and objectives of planning : “Planning is a way to systematize, direct and organize the events or competitions and extract the advantage and benefit of the available resources.”  “Planning is the process of making a sequence of work for a future line of action” . The success of Physical education programs depends upon efficient staffing, food, direction, proper control, well super vision, good co-ordination and minimize the chances of lapses. Objectives of planning :  (a) To keep control over all activities which suggests that planning & control are connected with each other.  (b) it also helps in keeping a good control in organizing a tournament.  (c )