Question 2 : At what temperature, due the Celsius and Fahrenheit scales show then same reading but with opposite sign?

Question 4 : The boiling point of water on celsius scale will be measured as

Question 5 : On which of the following scales of temperature, the temperature is never negative

Question 6 : Select the correct option given below:<br>Two absolute scale A and B have triple points of water defined to be at $200$ A and $350$ B.The relation between $T_A$ and $T_B$ is

Question 7 : Hailstone at $0^{o}C$ falls from a height of $1\ km$ on an insulating surface converting whole of its kinetic energy into heat. What part of it will melt ? $(g=10\ m/s^{2}$)

Question 8 : The point on the pressure temperature phase diagram where all the&#160;phases co-exist is called&#160;

Question 9 : The upper and lower fixed points of a faulty mercury thermometer are $210^oF$ and $34^oF$ respectively. The correct temperature read by this thermometer is

Question 10 : If the difference of temperature of two bodies is $5^oC$, then the difference of temperature on Kelvin scale is

Question 12 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">The heat change associated with reactions at constant volume is due to the difference in which property of the reactants and the products ?</p>

Question 13 : The internal energy of a piece of lead when beaten by a hammer will

Question 15 : Two absolute scale A and B have triple points of water defined to be at 200 A an 350 B. The relation between&#160;$T _ { A }$&#160;and $T _ { B }$&#160;&#160;is

Question 16 : A mercury thermometer is transferred from melting ice to hot liquid.The mercury rises to 9/10 distance between two fixed points. Find the temperature in liquid in Fahrenheit scale

Question 17 : Rewrite the following equation in terms of $C$:<div>$\displaystyle F \, = \, \dfrac {9}{5}C\, + \, 32\,$</div>

Question 18 : The temperature of a body on Kelvin scale is found to be $X\ K$. When it is measured by a Fahrenheit thermometer, it is found to be $X^o F$. Then $X$ is

Question 20 : The specific heat of a substance at temperature $t^oC$ is $s=at^2+bt+c$. The amount of heat required to raise the temperature of $m\ g$ of the substance from $0^oC$ to $t_0 ^oC$, is :

Question 21 : On a new scale of temperature (which is linear) and called the&#160;W scale, the freezing and boiling points of water are 39&#176;W and 239&#176;W respectively. What will be the temperature on the new scale, corresponding to a temperature of 39&#176;C on the Celsius scale ?

Question 22 : On a hypothetical scale A the ice point is $42^o$ and the steam point is $182^o$ For another scale B, the ice point is $-10^o$ and steam point in $90^o$) If B reads $60^o$, the reading of A is,

Question 23 : In which of the processes, does the internal energy of the system remain constant?

Question 24 : At what temperature, the Fahrenheit scale reading is double of Celsius Scale reading?

Question 25 : The triple point of carbon dioxide is $216.55\,K$ the corresponding temperature on the celsius and Fahrenheit scale respectively are:

Question 26 : In a sports meet the timing of a $200\ m$ straight dash is recorded at the finish point by starting an accurate stop watch on hearing the sound of starting gun fired at the starting point. The time recorded will be more accurate

Question 27 : Pallet, and Boojho measured their body temperature. Paheli found her's to be $98.6^{o}\digamma$ and Boojho recorded $37^{o}C$.<br>Which of the following statement is true?

Question 28 : Assertion: The lowest attainable temperature is absolute zero,i.e.,$0K=-273.15^oC.$ Reason: Size of each degree on Kelvin scale is same as that on Celsius scale.

Question 29 : Assertion: Fahrenheit is the smallest unit measuring temperature. Reason: Fahrenheit was the first temperature scale used for measuring temperature.

Question 30 : An ideal monoatomic gas undergoes a process in which its internal energy U and density $\rho$ vary as $U\rho\, =\, constant.$ The ratio of change in internal energy and the work done by the gas is

Question 31 : On a $X$ temperature scale, water freezes at $-125.0^o$ X and boils at $375.0^o X$ . On a $Y$ temperature scale water freezes at $-70.0^o Y$ and boils at $-30.0^o Y $ . The value of temperature on $X$ scale equals to the temperature of $50.0^o Y $ on $Y-$ scale is :

Question 33 : A piece of blue glass heated to a high temperature and a piece of red glass at room temperature, are taken inside a dimly lit room then

Question 34 : The ratio of thermal conductivity of two rods of different material is 5:4. The two rods of same area of cross-section and same thermal resistance will have the lengths in the ratio

Question 35 : Mode of transmission of heat, in which heat is carried by the moving particles, is

Question 37 : We consider the radiation emitted by the human body. Which of the following statements is true?

Question 38 : Mud houses are cooler in summer and warmer in winter because

Question 39 : If the length of a cylinder on heating increases by 2%, the area of its base will increase by

Question 40 : One quality of a thermometer is that its heat capacity should be small. If <img style='object-fit:contain' width=9 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea1314d1ac76a0b860f9dab"> is a mercury thermometer, <img style='object-fit:contain' width=10 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea1314d1ac76a0b860f9dac"> is a resistance thermometer and <img style='object-fit:contain' width=10 height=20 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea131b71ac76a0b860f9fe5"> thermocouple type then

Question 41 : Total energy emitted by a perfectly black body is directly proportional to <img style='object-fit:contain' width=19 height=22 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea132a427ce131ff7c05104"> where <img style='object-fit:contain' width=9 height=22 src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea132181ac76a0b860fa16e"> is

Question 42 : Relation between the colour and the temperature of a star is given by

Question 43 : On heating, the temperature at which water has minimum volume is

Question 44 : The bulk modulus of water if its volume changes from $100$ litre to $99.5$ litre under pressure of $100atm$ is then<br/>(Take $1\quad atm={ 10 }^{ 5 }N{ m }^{ -2 }\quad $)

Question 46 : A wire can be broken by $400kg.wt$. The load&#160;required to break the wire of double the thickness&#160;of the same material will be

Question 47 : If a rubber ball is taken at the depth of $200m$ in a pool, its voulme decreases by $0.1\%$. If the density of the water is $1\times 10^3kg/m^3$ and $g=10m/s^2$, then the volume elasticity in $N/m^2$ will be

Question 48 : The length of a cube increases by 0.1%, what is&#160;the bulk strain ?

Question 49 : When a weight of 10 kg is suspended from a copper wire of length 3 meters and diameter 0.4 mm, its length increases by 2.4 cm. If the diameter of the wire is doubled, then the extension in its length will be-

Question 50 : Two wires of equal lengths are mode of the same materil. Wire A has a diameter that is twice as that of wire B. If the identical weights are suspended from the ends of these wires, the increase in length is.

Question 51 : Two wire of same radius and length are subjected to the same load, One wire is of steel and the other is copper. If Young's modulus of steel is twice that of copper, then the ratio of elastic energy stored per unit volume of steel to that of copper wire is

Question 52 : A cube is shifted to a depth of $100m$ is alake. The change in volume is $0.1$%. The bulk modules of the material is nearly<br>

Question 53 : A force F is required to break a wire of length l and radius r. What force is required to break a wire, of same material having twice the length and six times the radius?

Question 54 : Which one of the following is true about Bulk Modulus of elasticity?

Question 55 : A lift of mass $10^{3}\ kg$ is tied with thick iron wires. If the maximum acceleration of the lift is $1.2\ ms^{-2}$ and the maximum safe stress is $1.4 \times 10^{8}\ Nm^{-2}$, the minimum diameter of wire is ($g=9.8\ ms^{-2}$)

Question 56 : A sphere contracts in volume by $0.01$% when&#160;taken to the bottom of lake $1km$ deep. If the&#160;density of water is $1gm/cc$, the bulk modulus of&#160;water is

Question 57 : When a pressure of $100$ atmosphere is applied on a spherical ball, then its volume reduces to $0.01\%$. The bulk modulus of the material of the rubber in $dyne/cm^2$ is :

Question 58 : A steel wire of uniform cross-sectional area $2\ mm^2$ is heated up to $50^oC$ and is stretched by clamping its two ends rigidly. The change in tension when the temperature falls from $50^oC$ to $30^oC$ is given by :<br/>$( \alpha =1.1\times 10^{-5}\,^o C, Y=2.0\times 10^{11}\ N/m^2)$

Question 59 : The interatomic distance for a metal is $3 \times 10 ^ { - 10 } \mathrm { m }$ If the interatomic force constant is $3.6 \times 10 ^ { - 9 } \mathrm { N } / \mathrm { A }$ then the young's modulus in $N / m ^ { 2 }$ will be<br>

Question 60 : Vessel of $1 \times 10^{-3} m^{3}$volume contains an oi. If a pressure of $1.2 \times 10^{5} N/m^{2}$is applied on it, thenvolume decreases by $0.3\times 10^{-3}m^{3}$ . The bulk modulus of oil is

Question 61 : A small but heavy block of mass $10\ kg$ is attached to a wire $0.3\ m$ long. Its breaking stress is $4.8\times 10^{7} N/m^{2}$. The area of the cross section of the wire is $10^{-6} m^{2}$. The maximum angular velocity with which the block can be rotated in the horizontal circle is

Question 62 : Two wires A and B are stretched by the same load. If the area of cross-section of wire 'A' is double that of 'B', then the stress of 'B' is?

Question 63 : A partition wall has two layers of different materials {tex} \mathrm A {/tex} and {tex} \mathrm B {/tex} in contact with each other. They have the same thickness but the thermal conductivity of layer {tex} \mathrm A {/tex} is twice that of layer {tex} \mathrm B {/tex}. At steady state the temperature difference across the layer {tex} \mathrm B {/tex} is {tex} \mathrm { 50K } {/tex} , then the corresponding difference across the layer {tex} \mathrm { A } {/tex} is<br>

Question 64 : A ball falling in a lake of depth $200\ m$ shows a decrease of $0.1\%$ in its volume at the bottom. The bulk modulus of the elasticity of the material of the ball is (take $g = 10\ m/s^{2})$.

Question 65 : The bulk modulus of water is $2.0 \times 10^{9} N/m^{2}$ The pressure required to increase the density of water by $0.1\%$ is :

Question 66 : The compressibility of water $4\times 10^{-5}$ per unit atmospheric pressure. The decrease in volume of $100\ cubic$ centimeter of water under a pressure of $100$ atmosphere will be:

Question 67 : Assertion: A Ductile metals are used to prepare thin wires. Reason: In the stress strain curve of ductile metals, the length between the points representing elastic limit and breaking point is very small.

Question 68 : Assertion: Ratio of isothermal bulk modulus and adiabatic bulk modulus for a monoatomic gas at a gIven pressure is $\dfrac{3}{5}$ Reason: This ratio is equal to $\displaystyle \gamma =\frac{C_{p}}{C_{v}}$

Question 69 : On taking a solid rubber ball from the surface to the bottom of a lake 200m deep, the reduction in volume is found to be 0.5%. If the density of water is 10$^{3}$ kgm$^{-3}$ and g$=$10 ms$^{-2}$, find the bulk modulus of rubber.

Question 70 : A copper wire of length $4.0m$ and area of cross section $1.2 cm^{2}$ is stretched with a force of $4.8 \times 10^{3}N$ If Youngs modulus for copper is $1.2 \times 10^{11} N/m^2$, the increase in the length of the wire will be<br><br>

Question 71 : In case of steel wire (or a metal wire), the yield limit is reached when :

Question 72 : In a wire of length $L$, the increase in its length is $l$ If the length is reduced to half, the increase in its length will be<br><br>

Question 73 : Maximum excess pressure inside a thin-walled steel tube of radius $r$ and thickness $\Delta r(&lt;&lt; r)$, so that tube would not rupture would be (breaking stress of steel is ${\sigma}_{max}$)<br>

Question 74 : Two wires of same material and same extension $\Delta l$ have lengths l and $3l$ and diameters $3d$ and d. What will be the ratio of the forces applied on the two?

Question 75 : The ratio of lengths of two rods A and B of same material is $1:2$ and the ratio of their radii is $2:1,$ then the ratio of rigidity of A and B will be

Question 76 : The bulk modulus of rubber is $9.8\times 10^{8}N/m^{2}$. To what depth a rubber ball be taken in a lake so that its volume is decreased by $0.1$% ?<br>

Question 78 : How much force is required to produce an increase of 0.2% in the length of a brass wire of diameter 0.6 mm? [Young's modulus for brass =&#160;$0.9\times 10^{11}$&#160;$N/m^{2}$]

Question 79 : The ration of radii of two wires of same material is $2 : 1$. If these wires are stretched by equal force, the ratio of stresses produced in them is

Question 80 : In performing an experiment to determine the Young's modulus Y of steel, a student can record the following values:<br>length of wire l$=(\ell_{0}\pm\Delta$l$){m}$<br>diameter of wire ${d}=({d}_{0}\pm\Delta {d})$ mm<br>force applied to wire ${F}$=$({F}_{0}\pm\Delta {F}){N}$<br>extension of wire ${e}=({e}_{0}\neq\Delta {e})$ mm<br>In order to obtain more reliable value for Y, the followlng three techniques are suggested. <br>Technique (i) A shorter wire ls to be used.<br>Technique (ii) The diameter shall be measured at several places with a micrometer screw gauge.<br>Technique (iii) Two wires are made irom the same ntaterial and of same length. One is loaded at a fixed weight and acts as a reference for the extension of the other which is load- tested<br>Which of the above techniques is/are useful?<br>

Question 81 : Which of the following will expand the most for same rise in temperature?

Question 82 : A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is: {tex} \left. \text { [Latent heat of ice is } 3.4 \times 10 ^ { 5 } \mathrm { J } / \mathrm { kg } = 10 \mathrm { N } / \mathrm { kg } \right] {/tex}<br>

Question 83 : In a Young's double slit experiment with sodium light, slits are 0.589 m apart. The angular separation of the maximum from the central maximum will be (given $\lambda =589$nm,):

Question 84 : The length of elastic string, obeying Hooke's law is {tex} \ell _ { 1 } {/tex} metres when the tension {tex} 4 \mathrm { N } {/tex} and {tex} \ell _ { 2 } {/tex} metres when the tension is {tex} 5 \mathrm { N } {/tex}. The length in metres when the tension is {tex} 9 \mathrm { N } {/tex} is -

Question 85 : The coefficient of thermal conductivity of copper, mercury and glass are respectively {tex} \mathrm { K } _ { \mathrm { c } } , \mathrm { K } _ { \mathrm { m } } {/tex} and {tex} \mathrm { K } _ { \mathrm { g } } {/tex} such that {tex} \mathrm { K } _ { \mathrm { c } } > \mathrm { K } _ { \mathrm { m } } {/tex}{tex} > \mathrm { K } _ { \mathrm { g } } . {/tex} If the same quantity of heat is to flow per sec per unit area of each and corresponding temperature gradients are {tex} \mathrm { X } _ { \mathrm { c } } , \mathrm { X } _ { \mathrm { m } } {/tex} and {tex} \mathrm { X } _ { \mathrm { g } } {/tex} then<br>

Question 86 : An Aluminium and Copper wire of same cross sectional area but having lengths in the ratio $2 : 3$ are joined end to end. This composite wire is hung from a rigid support and a load is suspended from the free end. If the increase in length of the composite wire is $2.1 \ mm$, the increase in lengths of Aluminium and Copper wires are : [$\displaystyle { Y }_{ Al }=20\times { 10 }^{ 11 }{ N }/{ { m }^{ 2 } }$ and&#160;$\displaystyle { Y }_{ Cu }=12\times { 10 }^{ 11 }{ N }/{ { m }^{ 2 } }$]

Question 87 : When the temperature of a rod increases from {tex}\mathrm t{/tex} to {tex} \mathrm { t } + \Delta \mathrm { t } {/tex} , its moment of inertia increases from {tex}\mathrm I{/tex} to {tex} \mathrm { I } + \Delta \mathrm { I } {/tex} . If {tex} \alpha {/tex} be the coefficient of linear expansion of the rod, then the value of {tex} \frac { \Delta \mathrm { I } } { \mathrm { I } } {/tex} is<br>

Question 88 : A thin uniform film of refractive index $1.75$ is placed on a sheet of glass of refractive index $1.5$. At room temperature $(20^{\circ}C)$, this film is just thick enough for light with wavelength $600nm$ reflected off the top of the film to be canceled by light reflected from the top of the glass. After the glass is placed in an oven and slowly heated to $170{|circ}C)$, the film concels reflected light wavelength $606nm$. The coefficient of linear expansion of the film is (Ignore any changes in the refractive index of the film due to the temperature change.)

Question 89 : When an elastic material with Young's modulus Y is subjected to stretching stress S, elastic energy stored per unit volume of the material is

Question 90 : Two rods of same length and transfer a given amount of heat 12 second, when they are joined as shown in figure<br> (i). But when they are joined as shown in figure<br>(ii), then they will transfer same heat in same conditions in<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5d5fcb8de5db655bbf10a034">

Question 91 : Two rods, one of aluminum and the other made of steel, having initial length {tex} \ell _ { 1 } {/tex} and {tex} \ell _ { 2 } {/tex} are connected together to form a single rod of length {tex} \ell _ { 1 } + \ell _ { 2 } . {/tex} The coefficients of linear expansion for aluminum and steel are {tex} \alpha _ { a } {/tex} and {tex} \alpha _ { s } {/tex} and respectively. If the length of each rod increases by the same amount when their temperature are raised by {tex} t ^ { 0 } \mathrm { C } , {/tex} then find the ratio {tex} \ell _ { 1 } / \left( \ell _ { 1 } + \ell _ { 2 } \right) {/tex}

Question 92 : Two wires of different material and radius have their length in ratio of $1:2.$ if these were stretched by the same force$,$ the strain produced will be in the ratio$.$&#160;&#160;

Question 93 : A uniformly tapering conical wire is made from a material of Young's modulus {tex}\mathrm Y{/tex} and has a normal, unextended length {tex}\mathrm L{/tex} . The radii, at the upper and lower ends of this conical wire, have values {tex}\mathrm R{/tex} and {tex} 3 \mathrm { R } , {/tex} respectively. The upper end of the wire is fixed to a rigid support and a mass {tex} \mathrm { M } {/tex} is suspended from its lower end. The equilibrium extended length, of this wire, would equal: {tex} \quad {/tex}

Question 94 : The sprinkling of water slightly reduces the temperature of a closed room because

Question 95 : The ratio of the lengths of two rods is $4:3 $ . The ratio of their coefficients of cubical expasion is $ 2:3 $ . Then the ratio of their liner expansions when they are heated through same temperature difference is :

Question 96 : Two wires are made of the same material and have the same volume. However wire {tex}1{/tex} has cross- sectional area {tex} A {/tex} and wire {tex}2{/tex} has cross-sectional area {tex} 9 A . {/tex} If the length of wire {tex}1{/tex} increases by {tex} \Delta x {/tex} on applying force {tex} F , {/tex} how much force is needed to stretch wire {tex}2{/tex} by the same amount?

Question 97 : A metallic rod {tex} \ell \mathrm { cm } {/tex} long, {tex} \mathrm { A } {/tex} square {tex} \mathrm { cm } {/tex} in cross-section is heated through {tex} \mathrm { t } ^ { \circ } \mathrm { C } {/tex} . If Young's modulus of elasticity of the metal is {tex} \mathrm { E } {/tex} and the mean coefficient of linear expansion is {tex} \alpha {/tex} per degree celsius, then the compressional force required to prevent the rod from expanding along its length is<br>

Question 98 : In Searle's experiment to find Young's modulus the diameter of wire is measured as $d=0.05cm$, length of wire is $l=125cm$ and when a weight,$m=20.0kg$ is put, extension in wire was found to be $0.100cm$. Find the maximum permissible error in Young's modulus $(Y)$. Use:$Y=\displaystyle\frac{mgl}{(\pi/4)d^2x}$.

Question 99 : A sample of a liquid has an initial volume of $1.5 L$. The volume is reduced by $0.2 mL,$ when the pressure increases by $140 kPa$. What is the bulk modulus of the liquid.<br/><br/>

Question 100 : A black body has maximum wavelength {tex} \lambda _ { m } {/tex} at temperature 2000{tex} \mathrm { K } {/tex} . Its corresponding wavelength at temperature 3000 {tex} \mathrm { K } {/tex} will be

Question 101 : Two persons pull a rope towards themselves. Each person exerts a force of {tex} 100 \mathrm { N } {/tex} on the rope. Find the Young's modulus of the material of the rope if it extends in length by {tex} 1 \mathrm { cm } {/tex}. Original length of the rope {tex} = 2 \mathrm { m } {/tex} and the area of cross-section {tex} = 2 \mathrm { cm } ^ { 2 } . {/tex}

Question 102 : {tex}10 \mathrm {gm}{/tex} of ice cubes at {tex} 0 ^ { \circ } \mathrm { C } {/tex} are released in a tumbler (water {tex} \text { equivalent } 55 \mathrm { g } ) {/tex} at {tex} 40 ^ { \circ } \mathrm { C } {/tex} . Assuming that negligible heat is taken from the surroundings, the temperature of water in the tumbler becomes nearly {tex} ( \mathrm { L } = 80 \mathrm { cal } / \mathrm { g } ) {/tex}<br>

Question 103 : Two rods of different materials having coefficients of thermal expansion and Young's moduli ${Y}_{1}, {Y}_{2}$, respectively are fixed between two rigid massive walls. The rods are heated such that undergo the same increase in temperature. There is no bending of the rods. If ${\alpha}_{1}:{\alpha}_{2}= 2:3$, the thermal stresses developed in the two rods are equal provided ${Y}_{1}: {Y}_{2}$ is equal to:<br/>