In each of the questions given below, there are two statements labelle...
Assertion (A): Ventilators are provided near the roof.
Reason (R): Conduction takes place better near the roof.
The correct answer for this question is option 'C' - A is true but R is false.
Explanation:
Ventilators are provided near the roof to allow the flow of fresh air into a space and remove stale air. This helps in maintaining proper air circulation and ventilation within a room or building. The primary purpose of ventilators is to promote the exchange of indoor and outdoor air, ensuring a constant supply of fresh air.
However, the reason given - "Conduction takes place better near the roof" - is not correct. Conduction is the transfer of heat or energy through direct contact between objects or substances. It is not related to the placement of ventilators near the roof.
Conduction occurs when there is a temperature difference between two objects in contact with each other, and heat energy flows from the hotter object to the colder one. The rate of conduction depends on various factors such as the thermal conductivity of the materials involved, the temperature difference, and the thickness of the objects.
The placement of ventilators near the roof is primarily for the purpose of ensuring proper air circulation and ventilation, not specifically related to conduction. Ventilation helps in removing stale air, odors, and pollutants from a space, and allows fresh air to enter. It also helps in controlling humidity levels and preventing the buildup of moisture, which can lead to mold and other issues.
In conclusion, while the assertion that ventilators are provided near the roof is true, the reason given for this - that conduction takes place better near the roof - is false. The correct answer is option 'C' - A is true but R is false.