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(d) 22.5 g
(c) 4.0 J/s
(c) 3 : 2
(c) 2 : 1
(b) 1.2 × 10⁻²
(a) increases as its effective length increases even though its centre of man (CM) still reaming at the centre of the bob
(b) Its speed of rotation decreases
(d) will bend with steel on concave side
(c) Mercury
(a) 9 : 4
Steam at 100°C is passed into 20 g of water at 10°C, then water acquires a temperating of 80°C, the man of water present will be [Take specific heat of water = 1 cal g⁻¹°C⁻¹and Latent heat of steam = 540 cal g⁻¹]
(d) 22.5 g
(d) 22.5 g
See lessThe two ends of a metal rod are maintained at temperatures 100°C and 110°C. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are now maintained at temperatures 200°C and 210°C, the rate of flow of heat will be
(c) 4.0 J/s
(c) 4.0 J/s
See lessTwo rods of different materials having coefficients of thermal expansion α₁ , α₂ and Young’s Moduli Y₁, Y₂ respectively are fixed between two rigid massive walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of the rods. If α₁ : α₂ = 2 : 3, the thermal stresses developed in the two rods are equal provided Y₁, Y₂ is equal to
(c) 3 : 2
(c) 3 : 2
See lessThe Young’s Modulus of steel is twice that of brass. Two wires of same length and of same area of cross-section; one of steel and another of brass are suspended from the same roof. If then the weights added to the steel and brass wires must be in the ratio of
(c) 2 : 1
(c) 2 : 1
See lessThe approximate depth of an ocean is 2700 m. The compressibility of water is 45.4×10⁻¹¹ Pa⁻¹ and density of water is 10³ kg/m³. What fractional compression of water will be obtained at the bottom of the ocean?
(b) 1.2 × 10⁻²
(b) 1.2 × 10⁻²
See lessAs the temperating is increases, the time period of pendulum
(a) increases as its effective length increases even though its centre of man (CM) still reaming at the centre of the bob
(a) increases as its effective length increases even though its centre of man (CM) still reaming at the centre of the bob
See lessA Uniform Metallic Rod rotates about its perpendicular bisector with constant angular speed. If it is heated uniformly to raise its temperating slightly
(b) Its speed of rotation decreases
(b) Its speed of rotation decreases
See lessA bimetallic strip is made of aluminum & steel Al steel (αAl>αsteel) . On heating the strip will
(d) will bend with steel on concave side
(d) will bend with steel on concave side
See lessThe angle of contact at the interface of water glass is 0°, Ethylolcohal–glass is 0°, Merecing–glass is 140° & Methyl iodide-glass is 30°. A glass capillary is put its a trough containing one of these for liquids. It is observed that the meniscus is convex. The liquid in the trough is
(c) Mercury
(c) Mercury
See lessAn ideal fluid flow through a pipe of circular cross section made of two sections with diameters 2.5 cm & 3.75 cm. The ratio of the velocities in the two pipes is
(a) 9 : 4
(a) 9 : 4
See less