Heat Transfer Through Conduction
Heat Transfer Through Conduction
Transfer of heat:
Heat is transferred by conduction, convection and radiation.
Conduction -
Transfer of heat from one particle to the adjacent particle is known as conduction of heat. In solids, heat is transferred by the process of conduction. In this process, the transfer of heat takes place through adjacent molecules.
Example: When one end of an iron rod is put over flame then part which is nearer to the flame is heated first and heat is gradually transferred to the other end of the rod. This happens because particles of iron rod which are nearer to the flame receive the heat and transfers this to the adjacent particles. Subsequently, the adjacent particles transfer the heat to the next adjacent particles. This process continues and heat reaches to the other end of the rod. Thus, heat transfer in solid takes place through conduction.
Conductor and Insulator:
Materials which allow heat to pass through it are called conductor or good conductor of heat, such as iron, copper, aluminium, etc. All metals are good conductors of heat. Since, mercury is a metal and found in liquid state at room temperature, that’s why it is used in thermometer.
Since metals are the good conductor of heat that’s why kitchen utensils are made of metals or alloys of metals.
Materials which do not allow heat to pass through them are called bad conductor or poor conductor of heat. They are also called insulators. Example: rubber, wood, plastic, etc. This is the cause that handles of frying pan or other kitchen utensils are made of plastic.
Application Of Conduction And Insulators
Stainless steel pans are usually provied with copper bottoms. The reason for this could be that | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct ? (a) In solids, heat is transferred by the process of conduction. (b) The materials which allow heat to pass through it are called conductor (c) The handles of kettles and utensils are made of insulators such as wood, plastic . | |||
| Right Option : D | |||
| View Explanation | |||
A wooden spoon is dipped in a cup of icecream , then its other end _______________ | |||
| Right Option : D | |||
| View Explanation | |||
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8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
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