reason for why people usually prefer to give a layer of earth insulation on ceiling
Answers
Heat is the transfer of energy by conduction, convection or radiation, as we learned in the previous chapter. Often, we want this energy to be transferred for heating. For example, when you place a heater in a room, you want the energy to be transferred through convection and radiation to the room so that the room becomes warmer.
In other situations, you want to prevent energy transfer. For example, on a cold winter's day, we need to minimize heat loss from the house, so that it stays warm. Other objects, such as electric geysers, need to prevent energy transfer to the surroundings so that the water inside stays warm. Materials which are insulators can slow down or prevent energy transfer.
An example of where we want the transfer of energy to take place in some parts of the system but prevent it in other parts, is in a solar water heater. The use of a solar water heater helps to save energy. This is not only because the system is efficient at warming water, but we also use solar power which is free, whereas we pay for electricity from the national grid and it puts demands on the national demand for electricity
Answer:
people usually prefer to give a layer of earth insulation on ceiling to stop the transfer of charge or current or heat radiation through the ceiling