Properties of Solids and Liquids — practice questions

132 curated practice questions from Properties of Solids and Liquids (Physics NEET, NTA Exams) — 56 medium, 58 easy, 18 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.

• Radius of a conductor increases uniformly from left end to right end as shown in fig. Material of the conductor is…
• A metallic prong consists of 4 rods made of the same material, cross – section and same lengths as shown. The three…
• In which mode of transmission, the heat waves travel along straight line with the speed of light?
• A rectangular film of liquid is extended from (4 ~cm 2 ~cm ) to (5 ~cm 4 ~cm ) . If the work done is 3 10^ -4 , the…
• A wall has two layers A and B made of different materials. The thickness of both the layers is the same. The thermal…
• A black body at 1227 o C emits radiations with maximum intensity at a wavelength of . If the temperature of the body is…
• A cube of side 40 mm has its upper face displaced by 0.1 mm by a tangential force of 8 x 10 3 N. The shearing modulus…
• Which of the following cylindrical rods will conduct more heat, when their ends are maintained at the same steady…
• Water is flowing continuously from a tap having an internal diameter 8 10^ -3 ~m . The water velocity as it leaves the…
• Assertion : Perspiration from human body helps in cooling the body. Reason : A thin layer of water on the skin enhances…
• According to Newton's law of cooling, the rate of cooling of a body is proportional to (Δθ) n , where Δθ is the…
• Given below are two statements Statement I : It is better to wash the clothes in cold soap solution. Statement II : The…
• Three rods of same dimensions are arranged as shown in figure. They have thermal conductivities and . The points P and…
• The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of…
• Two rods A and B have diameters in the ratio 1 : 2 and lengths in the ratio 2 : 1. If the temperatures at the ends are…
• A wire of length L and radius r is fixed at one end. When a stretching force F is applied at free end, the elongation…
• In which case the thermal conductivity increases from left to right
• A slab of stone of area and thickness is exposed on the lower surface to steam at A block of ice at rests on the upper…
• Assertion : The equivalent thermal conductivity of two plates of same thickness in contact (series) is less than the…
• Assertion : Snow is better insulator than ice. Reason : Snow contains air packet and air is good insulator of heat.
• The heat is flowing through a rod of length 50 cm and area of cross-section . Its ends are respectively at and . The…
• A slab consists of two parallel layers of two different materials of same thickness having thermal conductivities K 1…
• The viscous drag acting on a metal sphere of diameter 1 mm, falling through a fluid of viscosity 0.8 Pa s with a…
• A hot and a cold body are kept in vacuum separated from each other. Which of the following cause decrease in…
• Three black bodies A, B and C having diameters 2 m, 4 m and 6 m, respectively, emit radiation of maximum intensity at…
• A spherical ball contracts in volume by 0.015% when subjected to a pressure of 75 atmospheres. If one atmosphere is…
• Which of the following statements is correct
• Temperature of water at the surface of lake is –20° C . Then temperature of water just below the lower surface of ice…
• A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were halved and the…
• Which of the following is not a unit of Young's modulus ?
• A ball falling in a lake of depth 200 m shows a decrease of 0.1% in its volume at the bottom. What is the bulk modulus…
• Consider two thermometers and of equal length which can be used to measure temperature over the range to . contains…
• There is formation of layer of snow thick on water, when the temperature of air is (less than freezing point). The…
• Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and…
• A piece of paper wrapped tightly on a wooden rod is found to get heated quickly when held over a flame compared to a…
• A man is carrying a block of a certain substance (density 1000 kg/m 3 ) weighing 1 kg in his left hand and a bucket…
• In which of the following heat travels in a straight line with the speed of light
• Two solid spheres of same metal but of mass M and 8M fall simultaneously in a viscous liquid and their terminal…
• An iron rod of length 2 m and area of cross-section 50 mm 2 stretches by 0.5 mm, when a mass of 250 kg is hung from its…
• In which process, the rate of transfer of heat is maximum
• A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force…
• Given below are two statements: Statement I : It is hotter over the top of a fire than at the same distance on the…
• Which of the following circular rods, (given radius r and length I ) each made of the same material and whose ends are…
• Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
• Which of the following statements is/are correct I. Convection is a mode of heat transfer by actual motion of matter…
• Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
• Ice starts forming in lake with water at and when the atmospheric temperature is . If the time taken for 1 cm of ice be…
• The two ends of a metal rod are maintained at temperatures and The rate of heat flow in the rod is found to be If the…
• Which of the following is the correct device for the detection of thermal radiation
• If we dip capillary tubes of different radii r in water and the water rises to different heights h in them, then we…
• The spectrum of a black body at two temperatures 27 o C and 327 o C is shown in the figure. Let A 1 and A 2 be the…
• A metal plate 4 mm thick has a temperature difference of 32° C between its faces. It transmits 200 kcal / h through an…
• In a closed room, heat transfer takes place by
• A large number of liquid drops each of radius r coalesce to form a single spherical drop of radius R. The energy…
• Two rods A and B are of equal lengths. Their ends are kept between the same temperature and their areas of…
• Assertion : Radiation is the speediest mode of heat transfer. Reason : Radiation can be transmitted in zigzag motion.
• Two spheres of different materials one with double the radius and one-fourth wall thickness of the other, are filled…
• Consider the following statements and select the correct statement(s) I. Copper is a better conductor of heat than…
• Which of the following statements is/are correct I. Gases are poor thermal conductors. II. Liquids have conductivities…
• Two vessels of different materials are similar in size in every respect. The same quantity of ice filled in them gets…
• The amount of radiation emitted by a perfectly black body is proportional to [CPMT 2002; DPMT 2002; AFMC 1995; Pb. PMT…
• Assertion : It is hotter over the top of a fire than at the same distance on the sides. Reason : Air surrounding the…
• A metal rod of length 2 m has cross sectional areas 2 A and A as shown in figure. The ends are maintained at…
• The load versus elongation graph of four wires of the same material and same length is shown in the figure. The…
• In a surface tension experiment, spirit and water are mixed in a glass cylinder such that the density of the mixture…
• One end of a metal rod of length 1.0 m and area of cross section 100 cm 2 is maintained at 100° C . If the other end of…
• Two rods of equal length and diameter have thermal conductivities 3 and 4 units respectively. If they are joined in…
• The excess pressure across a soap bubble of radius r is p=[4 T] / r , where T is the surface tension of soap solution…
• If black wire of platinum is heated, then its colour first appear red, then yellow and finally white. It can be…
• Suppose the sun expands so that its radius becomes 100 times its present radius and its surface temperature becomes…
• The ratio of thermal conductivity of two rods of different material is 5 : 4 . The two rods of same area of…
• Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
• Minimum and maximum values of Poisson's ratio for a metal lies between :
• Two rods and of different materials are welded together as shown in figure. Their thermal conductivities are and The…
• The two ends of a rod of length L and a uniform cross-sectional area A are kept at two temperature and The rate of heat…
• A body cools from a temperature 3T to 2T in 10 minutes. The room temperature is T. Assume that Newton's law of cooling…
• Given below are two statements Statement I : The concept of surface tension is held only for liquids. Statement II …
• A ball of radius r is moving with uniform velocity v in mustard oil. The viscous force acting on the ball is F. What is…
• A square wire frame of size L is dipped in a liquid. On taking out a membrane is formed. If the surface tension of…
• Two vessels of different materials are similar in size in every respect. The same quantity of ice filled in them gets…
• Spherical balls of radius R are falling in a viscous fluid of viscosity η with a velocity v. The retarding viscous…
• V 1 and V 2 be the volumes of the liquids 1 and 2 flowing out of the same tube in the same interval of time t. If η 1…
• Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities K 1 , K 2 , K 3 , K…
• We consider the radiation emitted by the human body. Which of the following statements is true
• The following four wires are made of the same material. Which of these will have the largest extension when the same…
• Assertion : While measuring the thermal conductivity of liquid experimentally, the upper layer is kept hot and the…
• The rate of heat flow through the cross-section of the rod shown in figure is and thermal conductivity of the material…
• Two equal drops of water are falling through air with a steady velocity of 10 cm/s. If the drops recombine to form a…
• What will be the density of lead under a pressure of 20, 000 N/cm 2 ? (Density of lead is 11.4 g/cm 3 and the bulk…
• A black body radiates 20 W at temperature 227° C . If temperature of the black body is changed to 727° C then its…
• The energy supply being cut-off, an electric heater element cools down to the temperature of its surroundings, but it…
• When fluids are heated from the bottom, convection currents are produced because
• Assertion : The absorbance of a perfect black body is unity. Reason : A perfect black body when heated emits radiations…
• Find the difference of air pressure between the inside and outside of a soap bubble 5 mm in diameter, if the surface…
• Assertion : A body that is a good radiator is also a good absorber of radiation at a given wavelength. Reason …
• Three rods of the same dimensions have thermal conductivities and They are arranged as shown in fig. with their ends at…
• Three objects coloured black, grey and white can withstand hostile conditions up to 2800ºC. These objects are thrown…
• Three rods of the same dimension have thermal conductivities 3 K, 2 K and K. They are arranged as shown in fig. Given…
• An object kept in a large room having air temperature of 25 °C takes 12 minutes to cool from 80°C to 70°C. The time…
• Two rods, one made of copper and the other steel of the same length and cross sectional area are joined together. (The…
• The volume of a gas is reduced to half from its original volume. The specific heat will:
• Assertion : Air possesses only volume elasticity. Reason : Transverse waves travel through air in an organ pipe.
• Two wires are made of the same material and have the same volume. However, wire 1 has cross-sectional area A and wire 2…
• It is hotter for the same distance over the top of a fire than it is in the side of it, mainly because [NCERT 1976, 79…
• A composite metal bar of uniform section is made up of length 25 cm of copper, 10 cm of nickel and 15 cm of aluminium…
• Assertion : A man would feel iron or wooden balls equally hot at 98.4° F . Reason : At 98.4° F both iron and wood have…
• Which of the following law states that “good absorbers of heat are good emitters”
• Two rods of different materials having coefficients of thermal expansion I _ 1 , x_ 2 and Young's moduli Y 1 , Y 2…
• Which of the following statements is/ are false about mode of heat transfer I. In radiation, heat is transferred from…
• The coefficient of thermal conductivity depends upon
• Assertion : Greater the coefficient of thermal conductivity of a material, smaller is the thermal resistance of a rod…
• Rate of heat flow through a cylindrical rod is H 1 . Temperatures of ends of rod are T 1 and T 2 . If all the…
• A black body is at a temperature 300 K. It emits energy at a rate, which is proportional to [Pb. PMT 1998; AIIMS 2002…
• The following statement is NOT TRUE regarding Surface Tension
• Sixty four spherical rain drops of equal size are falling vertically through air with a terminal velocity 1.5 ms -1 …
• While measuring the coefficient of thermal conductivity of a liquid in an experiment, the upper part of the liquid is…
• The surface temperature of the Sun which has maximum energy emission at 500 nm is 6000 K. The temperature of a star…
• In heat transfer, which method is based on gravitation
• Assertion : Bodies radiate heat at all temperatures. Reason : Rate of radiation of heat is proportional to the fourth…
• Two wires of equal length I and cross-sectional area A are suspended from a rigid wall to a horizontal rod . If Y 1 and…
• At a common temperature, a block of wood and a block of metal feel equally cold or hot. The temperatures of block of…
• The thermo emf of a thermocouple varies with the temperature θ of the hot junction as E = a θ + b θ 2 in volts, where…
• A wire of length 2 m is made from 10 cm 3 of copper. A force F is applied so that its length increases by 2 mm. Another…
• Assertion : A brass tumbler feels much colder than a wooden tray on a chilly day. Reason : The thermal conductivity of…
• Consider two rods of same length and different specific heats (s 1 , s 2 ), thermal conductivities (k 1 , k 2 ) and…
• Assertion : For higher temperature, the peak emission wavelength of a black body shifts to lower wavelengths. Reason …
• A body floats in a liquid contained in a beaker. The whole system as shown in the figure falls freely under gravity…
• Assertion : Woollen clothes keep the body warm in winter. Reason : Air is a bad conductor of heat. [AIIMS 2002]
• Steam at 100°C is passed into 20 g of water at 10°C. When water acquires a temperature of 80°C, the mass of the water…
• Given below are two statements: Statement I : The amount of light emitted (intensity of radiation) from a black body…
• When the temperature of a body increases from t to (t+ t) , its moment of inertia increases from I to (I+ I) about the…
• Which of the following statements does not hold good for thermal radiation?

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