Question

Name the factor on which the increase in length of a rod on heating depends.

Answer 1

Hint: We know that the different length and radii of rods will heat at different temperatures. Heat conduction is a method of transfer of heat between two objects in direct contact with each other. The thermal expansion of glasses is higher when compared to crystals.

Complete answer:
In this question, we can find the effects of any physical quantity by explaining the formula of the coefficient of thermal conductivity. Some of the physical quantities are the characteristics of the material which may affect the coefficient of thermal conductivity. The temperature will determine which one will conduct the most of the heat and temperature also defines the flow of heat in a particular direction. The good conductors of electricity (metals like copper, aluminium, gold, and silver) also are good heat conductors, whereas insulators of electricity (wood, plastic, and rubber) are poor heat conductors. Let the molecules in the bodies be different temperatures.
The (average) K.E. of a molecule within the hot body is above within the colder body. If two molecules collide, an energy transfer from the recent to the cold molecule occurs. The cumulative effect from all collisions leads to a net flux of warmth from the recent body to the colder body. The increase in length of a rod on heating depends on its initial length, its rise in temperature and its material. Factors on which length of rod depend:
-Length of rod.
-Temperature of rod.
-Nature of the material of the rod.

Note:
Remember that the thermal expansion decreases with increasing bond energy, affecting the melting point of solids. So, the high melting point materials are more likely to contain a lower thermal expansion. Generally, liquids expand slightly more to that of solids.