What is convection,conduction abd radiation?
Conduction is the process by which heat passes from the hotter body to the colder arts of a body , without the particles of the body moving away from their normal positions. Ex. An iron rod heated at one end Convection is the process by which heat is transmitted in liquids and gases by the actual movement of the heated particles, taking place on account of the lower density of the heated portions. Ex. Heating a liquid in a vessel. Radiation is the process by which heat energy is transmitted from one place to another without the aid of an intervening medium. Ex. Energy we receive from the sun is by radiation.
