STANDARD Physics Thermal Properties Of Matter Class 11 Questions

The temperature which has same numerical value on Celsius and Fahrenheit scale is

There is a hole in the middle of a copper plate. When heating the plate, diameter of hole would

The coefficient of volume expansion of liquid is γ. The fractional change in its density for ΔT rise in temperature is

Find the stress developed inside a tooth cavity filled with copper when hot tea at temperature of 57°C is drunk. (Take temperature of tooth to be 37°C, α = 1.7 × 10⁻⁵°C and bulk modulus for copper = 140 × 10⁹ Nm⁻²)

Which of the following graph shows the variation of density of water with increase in temperature?

One end of a 0.25 m long metal bar is in steam and the other is in contact with ice. If 12g of ice melts per minute, then the thermal conductivity of the metal is (Given cross section of the bar = 5 × 10⁻⁴ m² and latent heat of ice is 80 cal g⁻¹)

With increase in temperature the viscosity of

In the previous question the equivalent thermal conductivity of the compound bar is

Consider a composite slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively. The equivalent thermal conductivity of the slab is

Three metal rods of the same material and identical in all respects are joined as shown in the figure. The temperatures at the ends are maintained as indicated. Assuming no loss of heat from the curved surfaces of the rods, the temperature at the junction X would be

A wall is made of equally thick layers A and B of different materials. Thermal conductivity of A is twice that of B. In the steady state, the temperature difference across the wall is 36°C. The temperature difference across the layer A is

Which one of the following is vₘ - T graph for perfectly black body? vₘ is the frequency of radiation with maximum intensity. T is the absolute temperature.

The coefficient of expansion of a crystal in one direction (x-axis) is 2.0 × 10⁻⁶ K⁻¹ and that in the other two perpendicular (y and z-axes) direction is 1.6 × 10⁻⁶ K⁻¹. What is the coefficient of cubical expansion of the crystal?

Which of the following statements is incorrect?

A sphere contracts in volume by 0.01%, when taken to the bottom of sea 1 km deep. The bulk modulus of the material of the sphere is (Given density of sea water may be taken as 1.0 × 10³ kg m⁻³)

The bulk modulus of water if its volume changes from 100 litre to 99.5 litre under a pressure of 100 atm is (Take 1 atm = 10⁵ N m⁻²)

The average depth of Indian ocean is about 3000 m. The fractional compression, ΔV/V of water at the bottom of the ocean is (Given : Bulk modulus of the water = 2.2 × 10⁹ N m⁻² and g = 10 m s⁻²)

The density of water at the surface of the ocean is ρ and atmospheric pressure is P₀. If the bulk modulus of water is K, what is the density of ocean water at a depth where the pressure is nP₀?

If stress-strain relation for volumetric change is in the form \( \frac{\Delta V}{V_0} = kP \) where P is applied uniform pressure, then K stands for

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K₁ and K₂. The thermal conductivity of the composite will be

A black body radiates heat energy at the 2 × 10⁵ J/sm² at the temperature of 127°C. Temperature of the black body at which rate radiation is 32 × 10⁵ J/sm², is

A glass slab is subjected to a pressure of 10 atm. The fractional change in its volume is (Bulk modulus of glass = \( 37 \times 10^9 \) N m\(^{-2}\), 1 atm = \( 1 \times 10^5 \) N m\(^{-2}\))

The compressibility of water is 6 × 10⁻¹⁰ N⁻¹ m². If one litre is subjected to a pressure of 4 × 10⁷ N m⁻², the decrease in its volume is

The volume change of a solid copper cube 10 cm on an edge, when subjected to a pressure of 7 MPa is (Bulk modulus of copper = 140 GPa)

A spring is made of steel and not of copper because

Three liquids of densities ρ₁, ρ₂ and ρ₃ (with ρ₁ > ρ₂ > ρ₃), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact θ₁, θ₂ and θ₃ obey

How much pressure should be applied on a litre of water if it is to be compressed by 0.1%? (Bulk modulus of water = 2100 MPa)

Assertion : A water drop sticks to the glass surface. Reason : Water have properties of surface tension.