Thermodynamics — practice questions
59 curated practice questions from Thermodynamics (Physics JEE Main, NTA Exams) — 48 easy, 5 medium, 6 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.
- A sphere of radius r, density ρ and specific heat capacity c, is hung by a thermally insulated thread in an enclosure…
- 50 g of ice at 0°C is mixed with 50 g of water at 60°C, final temperature of mixture will be :
- Given below are two statements. STATEMENT - 1: A quasi-static process is so called because it is a sudden and large…
- The wavelength corresponding to radiation of maximum inersity is 4µm. Find the wavelength of radiation with maximum…
- Given below are two statements. STATEMENT - 1: The work done on an ideal gas in changing its volume from V 1 to V 2…
- If the rate of change of temperature is 0.2°C/ min and excess temperature of a body over surrounding is 20°C, the…
- The intensity of radiation emitted by the Sun has its maximum value at a wavelength of 510 nm and that emitted by the…
- The amount of heat energy radiated by a metal at temperature T is E. When the temperature is increased to 3T, energy…
- Which of the following qualities are best suited for a cooking utensil
- A piece of metal is heated to temperature θ and then allowed to cool in a room which is at temperature θ 0 . The graph…
- STATEMENT - 1: The heat energy supplied to the body is converted into internal energy in an isothermal process…
- The temperature of coffee in a cup with time is most likely given by the curve in figure.
- Three very large plates of same area are kept parallel and close to each other. They are considered as ideal black…
- A body cools from 50°C to 46°C in 5 minutes and to 40°C in the next 10 minutes. The surrounding temperature is :
- One mole of an ideal gas at an initial temperature of T K does 6 R joules of work adiabatically. If the ratio of…
- The reading of Centigrade thermometer coincides with that of Fahrenheit thermometer in a liquid. The temperature of the…
- At critical temperature, the surface tension of a liquid is :
- The radius of a ring is R and its coefficient of linear expansion is α. If the temperature of ring increases by θ, then…
- Two spheres of the same material have radii 1 m and 4 m and temperatures 4000 K and 2000 K, respectively. The ratio of…
- Given below are two statements. STATEMENT - 1: In an adiabatic process, change in internal energy of a gas is equal to…
- A bucket full of hot water is kept in a room and it cools from 75°C to 70°C in T 1 minutes, from 70°C to 65°C in T 2…
- If the temperature of the sun were to increase from T to 2T and its radius from R to 2R, then the ratio of the radiant…
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT-1…
- A bi-metallic strip is made of two strips A and B having co-efficients of linear expansion α A and α B . If α A B …
- A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a…
- If temperature of the sun were to increase form T to 2T and its radius from R to 2R, then how many times the radiant…
- Two rods of different materials having coefficients of thermal expansion α 1 and α 2 and Young’s moduli Y 1 and Y 2…
- Given below are two statements. STATEMENT - 1: In a polytropic process, the pressure and volume in state 1 are P 1 and…
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT - 1…
- Liquids at temperature 60°C and 20°C, respectively, have mass ratio 3 : 4 and their specific heats in the ratio 4 : 5…
- Two metal rods A and B are having their initial length in the ratio 2 : 3 and the co-efficients of linear expansion in…
- Two metallic plates of equal thicknesses and thermal conductivities K 1 and K 2 are put together face to face and a…
- Given below are two statements. STATEMENT - 1: It is necessary to wait for thermal equilibrium to be established before…
- A power radiated by a black body is P 0 and the wavelength corresponding to the maximum energy is λ 0 . On changing the…
- Two circular discs A and B with equal radii are blackened. They are heated to same temperature and then cooled under…
- A solid ball of metal has a spherical cavity inside it. If the ball is heated the volume of cavity will :
- Newton’s law of cooling is used in laboratory for determining:
- Which of the following is incorrect regarding the first law of thermodynamics?
- The graph between two temperature scales A and B is shown in figure. Between upper fixed point and lower fixed point…
- Equal masses of two liquids A and B contained in vessels of negligible heat capacity are supplied heat at the same…
- If the temperature of a hot body is raised by 5% then the heat energy radiated would increase by
- Two spherical black bodies of radii r 1 and r 2 and with surface temperature T 1 and T 2 respectively, radiate the same…
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT-1…
- A sphere, a cube and a thin circular plate, all of same material and same mass, are initially heated to same high…
- Velocity of heat radiation v as related to the velocity of light c is
- A steel wire of cross–sectional area 0.5 mm 2 is held between two fixed supports. If the wire is just taut at 20°C…
- If m is the mass, θ is temp. and ‘s’ is specific heat, then thermal capacity K is given by
- Two metal rods A and B of equal lengths and equal cross sectional areas are joined end-to-end. The co-efficients of…
- Three copper blocks of masses M 1 , M 2 and M 3 kg, respectively are brought into thermal contact till they reach…
- The radius of a metal sphere at room temperature T is R, and the coefficient of linear expansion of the metal is α. The…
- Newton’s law of cooling leads us to the following expression,
- An iron ball of mass 0.2 kg is heated to 10°C and put into a block of ice at 0°C. 2.5 g of ice melts. If the latent…
- An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If, 'T i ' is the initial…
- A block of steel heated to 100°C is left in a room to cool. Which of the curves shown in the figure represents the…
- Two metallic plates of equal lengths and thermal conductivities k 1 and k 2 are put together such that their ends…
- If a certain mass of gas is made to undergo adiabatic and isothermal expansion to the same pressure, starting from the…
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT-1…
- Assuming the sun to be a spherical body of radius R at a temperature of T K, evaluate the total radiant power, incident…
- What should be the lengths of steel and copper rods at 0°C so that the length of the steel rod is 5 cm longer than the…