WELCOME IN THE WORLD OF UNDERSTANDING

Class 9 Math Chapter 1:Number Systems Chapter 2: Polynomials Chapter 3: Coordinate Geometry Chapter 4: Linear Equations in Two Variables Chapter 5: Introduction to Euclid’s Geometry Chapter 6: Lines and Angles Chapter 7: Triangles Chapter 8: Quadrilaterals Chapter 9: Areas of Parallelograms and Triangles Chapter 10: Circles Chapter 11: Constructions Chapter 12: Heron’s Formula Chapter 13: Surface Areas and Volumes Chapter 14: Statistics Chapter 15: Probability Science Chapter 1. Matter in Our Surroundings Chapter 2. Is Matter Around Us Pure Chapter 3. Atoms and Molecules Chapter 4. Structure of the Atom Chapter 5. The Fundamental Unit of Life Chapter 6. Tissues Chapter 7. Diversity in Living Organisms Chapter 8. Motion Chapter 9. Force and Laws of Motion Chapter 10. Gravitation Chapter 11. Work and Energy Chapter 12. Sound Chapter 13. Why do We Fall ill Chapter 14. Natural Resources Chapter 15. Improvement in Food R

Mineral and Power resources is very important for our daily life we must have to conserve it. To get the full pdf of Class 8 and 10 Mineral and power resources is please  CLICK HERE      

OUR COUNTRY – INDIA §       India is a country of vast geographical expanse. §     The Indian landmass has a central location between the East and the West Asia. India is a southward extension of the Asian Continent. §      India is bounded by the young fold mountains in the northwest, north and north east. §        The Arabian Sea in the west §        The Bay of Bengal in the east §         Indian Ocean in the south §         India has an area of about 3.28 million sq. km. §      India’s total area accounts for about 2.4 per cent of the total geographical area of the world §     India is the seventh largest country of the world. §        India has a land boundary of about 15,200 km §   The total length of the coast line of the mainland including Andaman and Nicobar and Lakshadweep is 7,516.6 km. §   The north-south extent from Kashmir to Kanyakumari is about 3,200 km. And the east-west extent from Arunachal Pradesh to Kuchchh is about 2,900 km. §  

For pdf of Natural phenomena Please  CLICK HERE

To get class 12 electrostatics notes please  CLICK HERE

1. What is electrostatic force? 2. What is SI unit of charge? 3. Write the two properties of electric field line? 4. Write the two properties of electric charge? 5. What is coulomb’s law? 6. Write the SI unit of ε 0 ? 7. What is electric field? 8. Why electric field lines don’t cross each other? 9. What is induction of charge? 10. What is conservation of charge? 11. Why we use earthing in homes? 12. What is the value of e? 13. What is electric field near the thin sheet of charged conductor? 14.   In the given fig If the net force on Q is zero then find the value of Q/q?                                                                  15. When a body is charge it mass will increase, decrease or same? 16. A Gaussian surface have three charge (-q), (+2q), (-q) Evaluate the net electric flux through it? 17.   Write down the unit and dimension of permittivity of free space? 18. Define electric flux? 19. Write the SI unit of electric flux? 20. What is the u

1. What is the relation between focal length and radius of curvature? 2. What is mirror formula? 3. Write two law of reflection? 4. What is magnification? 5. What is the SI unit of magnification? 6.   What is snell ’s laws? 7. What is refractive index? 8. What is spherical mirror? 9. What is total internal reflection? 10. What is critical angle? 11. Write one application of total internal reflection?   12. Why mirage formation takes place? 13. What is lens formula? 14. When a ray of light passes through the optical center of the lens where does it deviate? 15. Define power of the lens? 16. Which type of mirror is called converging mirror? 17. In which medium speed of light is maximum? 18. Power of convex lens whose focal length is 20 cm? 19. Establish the relation between critical angle and refrective index? 20 what is the SI unit of the power of the lens? 21. Write the formula to find the angle of prism? 22. After dispersion from prism which color of light

1. Lactobacillus is an ________ 2. _______________is used in sowing 3. Influenza is caused by ___________ 4. Small pox vaccine is discover by______________ 5. Which one of the following is thermosetting plastic 6. Name the metal which reacts vigorously with cold water? 7. Which property of copper used for making eclectic wire? 8. Which of the following is not the constituent of petroleum?                                                       coke, coal-tar, petroleum, kerosene  9. Which of the following is not natural resource? Water minerals soil rayon      10. Black thick liquild with unpleasant smell? 11. leaves are green due to 12. Which one of the following is found in plant , animal and bacteria? 13. Hen is _____________ 14. The reproduction in amoeba is takes place by 15. 15 is added to product of y and 13 gives us 54 find the value of y 16. Four angle of quadrilateral are in ratio 3:4:5:6.