Answer

Verified

387.9k+ views

**Hint:**We need to know what convection is and what conduction is. From the definition of the convection and conduction we can easily give the answer of this question. In which process heat can transfer through a gas or any liquid like the hotter part will rise up and the cooler part which I heavier will sink, is called convection. Gravity is the natural or free convection.

**Complete answer:**

When the pipe is heated by conduction method, the water inside the pipe is also heated as the water is directly connected to the pipe. The bottom surface of the heated pipe will achieve higher temperature and for that the water of the bottom surface of the pipe also becomes hotter and less dense. Less dense water is lighter so it will move up and the colder water which is heavier and denser will come down and then the convection will set up. So, in the experiment of convection heat transfer, water inside the pipe is heated by free convection and conduction.

**Hence, option A is correct.**

**Note:**We can get confused by the definition of convection and conduction. Without any brief knowledge about convection and conduction one cannot answer this question correctly. The example of free and natural convection is the phenomena of the sea breeze during the day time

Recently Updated Pages

What number is 20 of 400 class 8 maths CBSE

Which one of the following numbers is completely divisible class 8 maths CBSE

What number is 78 of 50 A 32 B 35 C 36 D 39 E 41 class 8 maths CBSE

How many integers are there between 10 and 2 and how class 8 maths CBSE

The 3 is what percent of 12 class 8 maths CBSE

Find the circumference of the circle having radius class 8 maths CBSE

Trending doubts

One cusec is equal to how many liters class 8 maths CBSE

Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

Which are the Top 10 Largest Countries of the World?

Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE

Fill the blanks with the suitable prepositions 1 The class 9 english CBSE

Give 10 examples for herbs , shrubs , climbers , creepers

Difference Between Plant Cell and Animal Cell

Change the following sentences into negative and interrogative class 10 english CBSE

Write a letter to the principal requesting him to grant class 10 english CBSE