
When two ends of a rod wrapped with cotton are maintained at different temperatures and after some time every point of the rod attains a constant temperature, then
A. Conduction of heat at different points of the rod stops because the temperature is not increasing
B. Rod is a bad conductor of heat
C. Heat is being radiated from each point of the rod
D. Each point of the rod is giving heat to its neighbour at the same rate at which it is receiving heat.
Answer
164.7k+ views
Hint: In order to solve this problem we need to understand thermal equilibrium. When the two physical bodies are said to be in thermal equilibrium if there is no net transfer of heat if they are connected by the path which allows heat transfer.
Complete step by step solution:
When two ends of a rod wrapped with cotton are maintained at different temperatures and after some time every point of the rod attains a constant temperature, then the conduction of heat at different points of the rod will not stop because as the temperature increases, the conduction from atom to atom in a substance also increases. So option 1 is wrong.
If we consider option 2. Whether the rod is a bad or good conductor of heat does not matter once it reaches the constant temperature.
When a body is heated only from the surface the heat is radiated and not from each point or inside a rod. So, option 3 is also wrong.
The rate at which the heat is released at the same rate the heat is receiving from the neighbouring point. Therefore, each point of the rod is giving heat to its neighbour at the same rate at which it is receiving heat.
Hence, option D is the correct answer.
Note: This thermal equilibrium follows the Zeroth Law of Thermodynamics. If the body is said to be in thermal equilibrium, then the two bodies should have the same temperature, if not it will attain the same temperature by releasing or absorbing heat from one body to another thereby attaining the same temperature.
Complete step by step solution:
When two ends of a rod wrapped with cotton are maintained at different temperatures and after some time every point of the rod attains a constant temperature, then the conduction of heat at different points of the rod will not stop because as the temperature increases, the conduction from atom to atom in a substance also increases. So option 1 is wrong.
If we consider option 2. Whether the rod is a bad or good conductor of heat does not matter once it reaches the constant temperature.
When a body is heated only from the surface the heat is radiated and not from each point or inside a rod. So, option 3 is also wrong.
The rate at which the heat is released at the same rate the heat is receiving from the neighbouring point. Therefore, each point of the rod is giving heat to its neighbour at the same rate at which it is receiving heat.
Hence, option D is the correct answer.
Note: This thermal equilibrium follows the Zeroth Law of Thermodynamics. If the body is said to be in thermal equilibrium, then the two bodies should have the same temperature, if not it will attain the same temperature by releasing or absorbing heat from one body to another thereby attaining the same temperature.
Recently Updated Pages
Uniform Acceleration - Definition, Equation, Examples, and FAQs

JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

Atomic Structure - Electrons, Protons, Neutrons and Atomic Models

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Displacement-Time Graph and Velocity-Time Graph for JEE

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Degree of Dissociation and Its Formula With Solved Example for JEE

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 11 Physics Chapter 1 Units and Measurements

Units and Measurements Class 11 Notes: CBSE Physics Chapter 1

Motion in a Straight Line Class 11 Notes: CBSE Physics Chapter 2

NCERT Solutions for Class 11 Physics Chapter 2 Motion In A Straight Line

Important Questions for CBSE Class 11 Physics Chapter 1 - Units and Measurement
