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of  classes IX to XII 
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  • Theorem 6.6 Class X
    Theorem 6.6 Statement "The ratio of the areas of two similar triangles is equal to the square of the ratio of their correspondin...
  • Speed and Velocity
    Speed The rate of change of distance per unit time of a moving body is called speed. Speed = distance/time The SI unit of speed is metre...
  • Conservation of Linear Momentum
    Conservation of Linear Momentum           Momentum     The product of mass and velocity of a moving body is said to be momentum.  It...
  • Straight Line
      Slope of a Line A line in a coordinate plane forms two angles with the x-axis, which are supplementary.   The angle (say) θ made by the li...
  • Heights And Distances
    Chapter 9 Class X Exercise 9.1 Q.No. 1 A circus artist is climbing a 20 m long rope, which is tightly stretched and tied from the...
  • Circular Motion and Physical Equation
    Consider about a circular path of radius r. A body moves from A to B with uniform speed v in time t. The body subtends an angle 𝜃 at the c...
  • 15. Probability
    Class X Probability Exercise 15.1 Q.No. 1. Complete the following statements: (i) Probability of an event E + Probability of the ev...
  • Chalcolithic Period
    Chalcolithic Period • The end of the Neolithic period saw the use of  metals of which copper was the fi rst. A culture  based on the use of ...
  • 4.7 Ampere's Circuital Law
    Subject: Physics Class XII Chapter: 4. Moving Charges and Magnetism Ampere's Law  "The integral of magnetic field arou...