Class 10th CBSE

Current Electricity Basics * Electric current is uniform flow of charges in a particular direction. * The rate of flow of charge or uniform motion of electrons: ( I = Q/t) * Potential difference is the work done in moving a unit charge between two points in an electric field against the direction of force: ... Read more

Human Eye * The human eye is an optical device that serves as our organ of sight. It transforms light waves reflected from objects we see into images. The major parts of the human eye and their functions are:    *  Sclera: Protects and contains internal parts    *  Cornea: Refracts incident light    *  ... Read more

Reflection * Based on the nature of the reflecting surface, reflection can be regular and irregular. * Images can be real images that can be caught on a screen, or virtual images that cannot be caught on a screen. Images formed in a plane mirror are virtual. According to the laws of reflection:   *  ... Read more

Heredity and Variations * The process of passing of the traits from parents to offspring is called Heredity. * Offspring are never an exact copy of their parents. They show minor differences, which are called Variations. * Mendel was the pioneer among Geneticists who found the inheritance of characters from parents to offspring. * A ... Read more

Reproduction and its Significance * Reproduction is the process by which an organism gives birth to a new individual. * DNA variation is useful for the survival of a species, during drastic changes in their environment. * DNA variations are passed to the subsequent generations when they reproduce. Reproduction in Unicellular and Multicellular Organisms * ... Read more

Nervous System * The nervous system is made up of the brain, spinal cord and a huge network of nerves that thread through our body. * The nervous system is responsible for sending, receiving and processing nerve impulses. * Neurons are the fundamental unit of the nervous system. The axons of the nervous bundle together ... Read more

Photosynthesis * The process that helps in carrying out metabolic functions of living organisms are called life processes. * The process of obtaining energy from food is called nutrition. * Preparation of organic compounds from inorganic substances is called autotrophic nutrition. * Heterotrophs depend on autotrophs for nutrition. * The process of fixation of atmospheric ... Read more

History of Periodic Table * Dobereiner’s law of triads: In a triad, the atomic mass of the middle element is equal to the arithmetic mean of the atomic masses of the other two. * Newlands law of octaves: When elements are arranged in increasing order of their atomic weights, the properties of the eighth element ... Read more