Heat Transfer — JEE Main PYQs & Practice Questions

Heat Transfer is a Physics chapter in the JEE Main syllabus. This page brings together 30 previous-year and practice questions on Heat Transfer, organised into 3 topics: Conduction, Radiation and Stefan-Boltzmann Law and Newton's Law of Cooling. Most questions come with a step-by-step solution you can work through free in PrepWiser.

Download Heat Transfer JEE Main PYQs as a free PDF (with answer key)

Revise this chapter: Revision notes · Formula sheet

Chapter weightage: how many questions each chapter had per shift in the 2024–26 papers.

Conduction

• Three conductors of same length having thermal conductivity k₁, k₂ and k₃ are connected…
• As per the given figure, two plates A and B of thermal conductivity K and 2 K are joined…
• Three rods of identical cross-section and lengths are made of three different materials…
• A rod CD of thermal resistance 10.0 KW⁻¹ is joined at the middle of an identical rod AB…
• Two identical metal wires of thermal conductivities K₁ and K₂ respectively are connected…
• Two thin metallic spherical shells of radii r₁ and r₂ (r₁ < r₂) are placed with their…
• Two metallic blocks M₁ and M₂ of same area of cross-section are connected to each other…
• Two plates A and B have thermal conductivities 84 Wm⁻¹ K⁻¹ and 126 Wm⁻¹ K⁻¹…
• The difference of temperature in a material can convert heat energy into electrical…
• Most good thermal conductors are also:
• The three fundamental modes of heat transfer are:
• Rods x and y of equal dimensions but of different materials are joined as shown in…
• Two cylindrical rods A and B made of different materials, are joined in a straight line…
• An ice cube of dimensions 60 cm × 50 cm × 20 cm is placed in an insulation box of wall…
• The temperature θ at the junction of two insulating sheets, having thermal resistances…
• If K₁ and K₂ are the thermal conductivities, L₁ and L₂ are the lengths and A₁ and A₂ are…

Radiation and Stefan-Boltzmann Law

• Nearly 10% of the power of a 110 W light bulb is converted to visible radiation. The…
• A wire of length 10 cm and diameter 0.5 mm is used in a bulb. The temperature of the…
• According to the Stefan-Boltzmann law, the power radiated by a black body is…
• Two spherical bodies of same materials having radii 0.2 m and 0.8 m are placed in same…

Newton's Law of Cooling

• In 5 minutes, a body cools from 75°C to 65°C at room temperature of 25°C. The…
• A cup of coffee cools from 90°C to 80°C in t minutes when the room temperature is 20°C…
• The temperature of a body in air falls from 40° C to 24° C in 4 minutes. The temperature…
• A body cools from 80° C to 60° C in 5 minutes. The temperature of the surrounding is 20°…
• A body cools from 60°C to 40°C in 6 minutes. If, temperature of surroundings is 10°C…
• A bowl filled with very hot soup cools from 98°C to 86°C in 2 minutes when the room…
• A metallic sphere cools from 50ᵒC to 40ᵒ in 300 s. If atmospheric temperature around is…
• A body cools in 7 minutes from 60° C to 40° C. The temperature of the surrounding is 10°…
• Read the following statements : A. When small temperature difference between a liquid…
• A body takes 4 min. to cool from 61° C to 59° C. If the temperature of the surroundings…

More Physics chapters

• Basic Mathematics for Physics
• Units, Dimensions & Errors
• Rectilinear Motion
• Vectors
• Projectile Motion & Relative Motion
• Newton's Laws of Motion
• Friction
• Circular Motion
• Work, Energy & Power
• Centre of Mass & Linear Momentum
• Collision
• Rotational Motion
• Gravitation
• Simple Harmonic Motion
• Elasticity
• Fluid Mechanics
• Surface Tension
• Thermometry & Calorimetry
• Kinetic Theory of Gases
• Thermodynamics
• Mechanical Waves
• Sound Waves
• Experimental Skills
• Electrostatics I — Charges, Field & Gauss's Law
• Electrostatics II — Potential & Capacitance
• Current Electricity
• Moving Charges & Magnetism
• Magnetism & Matter
• Electromagnetic Induction
• Alternating Current
• Electromagnetic Waves
• Ray Optics
• Wave Optics
• Dual Nature of Radiation & Matter
• Atomic Physics
• Nuclear Physics
• Semiconductors & Electronic Devices
• Communication Systems

Frequently asked questions

How many Heat Transfer questions are there for JEE Main?

PrepWiser has 30 Heat Transfer questions for JEE Main, grouped into 3 topics such as Conduction, Radiation and Stefan-Boltzmann Law and Newton's Law of Cooling.

Are these Heat Transfer questions from previous-year JEE Main papers?

Yes — most are genuine previous-year questions from past JEE Main papers, and the rest are practice questions written to match the JEE Main pattern and difficulty.

Where can I see the answers and solutions to these Heat Transfer questions?

Open any Heat Transfer question in PrepWiser (it is free) to attempt it; most come with a step-by-step solution.