Question

The house made out of soil is cold in summer and hot in cold weather because the soil is a/an ........... of heat.
1. Conductor
2. Insulator
3. Semiconductor
4. None of the above

Answer 1

Correct Answer - Option 2 : Insulator

CONCEPT:

Types of material:

CONDUCTOR	INSULATOR	SEMICONDUCTOR
A conductor is a type of material that allows the flow of heat in one or more directions.	An insulator is a type of material that prevents any heat flow from flowing through it.	A semiconductor is a crystal material whose ability to conduct heat rises as its temperature goes up. It sometimes acts as a conductor and sometimes as an insulator.
For a conductor, conductivity is maximum and resistivity is minimum.	For an insulator, conductivity is minimum and resistivity is maximum.	For a semiconductor, conductivity is less the conductor and more than an insulator, similarly, resistivity is is more than conductor and less than an insulator
Example- iron, copper, etc	Example- wood, soil, etc	Example- silicon, germanium, etc

EXPLANATION:

• The house will remain warm in winter and cold in summer if it is well insulated.
• Since soil is an insulator. That's why the house made out of the soil is cold in summer and hot in cold weather.
• Hence option 2 is correct.