Answer
414.6k+ views
Hint
We should know that thermal conductivity is defined as the ability of a given material to conduct or we can say transfer heat. It is generally denoted by the symbol k. The reciprocal of thermal conductivity is known as thermal resistivity. We can also say that thermal conductivity is defined as the rate at which heat is transferred by conduction through a unit cross-sectional area of a material, when a temperature gradient exists perpendicular to the area. Based on this concept we have to solve this question.
Complete step by step answer
The heat flow can be expressed with the equation,
$ \dot{Q}=K A \dfrac{d \theta}{d l} $
Where, K is the thermal conductivity and $ \dfrac{d \theta}{d l} $ is the temperature gradient at any point of the rod which is also equivalent to the difference in temperature per unit length.
Given that $ A=1 $ (equivalent to unit cross section) and heat flow $ =l $ ;
$ l=K \dfrac{d \theta}{d l} $
$ \dfrac{d \theta}{d l}=\dfrac{l}{K}= $ constant
Being a multiple-choice solution,
We see that Option A and Option C satisfies the conditions while Option B does not. Option D is also incorrect since Option B is incorrect.
Therefore, the correct answers are Option (A) and Option (C).
Note
We should know that a temperature gradient is a physical quantity that describes in which direction and at what rate the temperature changes the most rapidly around a particular location. The temperature gradient is a dimensional quantity which is expressed in units of degrees, on a particular temperature scale, per unit length.
It should be known to us that the temperature gradient between places results in differences in air pressure and ultimately, wind. With the increase in the wind speed, the temperature difference is greater. Winds are known to re-distribute energy around the world.
We should know that thermal conductivity is defined as the ability of a given material to conduct or we can say transfer heat. It is generally denoted by the symbol k. The reciprocal of thermal conductivity is known as thermal resistivity. We can also say that thermal conductivity is defined as the rate at which heat is transferred by conduction through a unit cross-sectional area of a material, when a temperature gradient exists perpendicular to the area. Based on this concept we have to solve this question.
Complete step by step answer
The heat flow can be expressed with the equation,
$ \dot{Q}=K A \dfrac{d \theta}{d l} $
Where, K is the thermal conductivity and $ \dfrac{d \theta}{d l} $ is the temperature gradient at any point of the rod which is also equivalent to the difference in temperature per unit length.
Given that $ A=1 $ (equivalent to unit cross section) and heat flow $ =l $ ;
$ l=K \dfrac{d \theta}{d l} $
$ \dfrac{d \theta}{d l}=\dfrac{l}{K}= $ constant
Being a multiple-choice solution,
We see that Option A and Option C satisfies the conditions while Option B does not. Option D is also incorrect since Option B is incorrect.
Therefore, the correct answers are Option (A) and Option (C).
Note
We should know that a temperature gradient is a physical quantity that describes in which direction and at what rate the temperature changes the most rapidly around a particular location. The temperature gradient is a dimensional quantity which is expressed in units of degrees, on a particular temperature scale, per unit length.
It should be known to us that the temperature gradient between places results in differences in air pressure and ultimately, wind. With the increase in the wind speed, the temperature difference is greater. Winds are known to re-distribute energy around the world.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Why Are Noble Gases NonReactive class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
At which age domestication of animals started A Neolithic class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)