(a) 4 : 3 (b) 2 : 3 (c) 3 : 4 (d) 1 : 3 Answer-c (4)
5 gm cm–3 and having dimensions 5 cm × 5 cm × 5 cm is weighed in water. Its apparent weight will be (a) 5 × 5 × 5 × 5 gf (b) 4 × 4 × 4 × 4 …
(a) 8 (b) 4 (c) 3 (d) Zero Answer-b (7)
s1 and mass m1 is mixed with another substance of specific gravity s2 and mass m2 ; then the specific gravity of the alloy is (a) ( m1 + m2 )/(s1 +s2 ) …
1.2 × 103kg/m3. If outer diameter and the density of the bowl are 1 m and 2 × 104 kg/m3 respectively, then the inner diameter of the bowl will be (a) 0.94 m (b) 0.97 m (c) 0.98 m …
The weight that can be put on the raft to make it just sink, should be (density of wood = 600 Kg/m3) (a) 80 Kg (b) 50 Kg (c) 60 Kg …
900 Kg/m3 is floating in water of density 1000 Kg/m3. The percentage of volume of ice-cube outside the water is (a) 20% (b) 35% (c) 10% …
(a) Quantity of water increases with depth (b) Density of water increases with depth (c) Pressure of water increases with depth (d) Temperature of water increases with depth Explanation- (c) A torque is acting on the wall of the dam …
a rotatable shaft as shown in figure. If the tube is rotated with a constant angular velocity ω then (a) Water levels in both sections A and B go up (b) Water level in Section A goes up and that …
(a) 11d/7 (b) 18d/11 (c) 13d/9 …
(density = 1.3 g/cm3) column of length 10 cm is introduced into one of its arms. Oil of density 0.8 gm/cm3 is poured into the other arm until the upper surfaces of the oil and glycerin are in the same …
(a) Half of the radius of the vessel (b) Radius of the vessel (c) One-fourth of the radius of the vessel (d) Three-fourth of the radius of the vessel Answer-b (9)
(a) Increases by 2% (b) Decreases by 2% (c) Remains unchanged (d) Sometimes increases and sometimes decreases Answer-a (8)
(a) Zero (b) Equal to 76 cm (c) More than 76 cm (d) Less than 76 cm Answer-d (0)
(a) Increases (b) Decreases (c) Remain constant (d) First decrease and then increase Answer-b (3)
(a) 152 cm (b) 76 cm (c) 38 cm (d) 38√3 cm Answer-a (2)
ρ1 and ρ2 respectively are mixed, then density of mixture is given by (a) ρ=(ρ1 + ρ2)/2 (b) ρ=(ρ1 + ρ2)/( 2 ρ1 ρ2) (c) …
(a) (i) B (ii) D (b) (i) C (ii) D (c) (i) B (ii) C (d) (i) B (ii) A Explanation- (a) Due to acceleration towards right, there will be a pseudo force in a left direction. So the pressure …
104. The height of the hill is (a) 250 m (b) 2.5 km (c) 1.25 km (d) 750 m Answer-b …
1.5 gm/cc. The pressure difference between the point P and S will be (a) 105 N/m (b) 2 × 105 N/m (c) Zero (d) Infinity Explanation- (c) As the both points are at the surface of liquid and these points …
50 cm3 of air trapped in it. The bell is brought to the surface of the lake. The volume of the trapped air will be (atmospheric pressure = 70 cm of Hg and density of Hg = 13.6 g/cm3)An inverted …
(a) 2/3 (b) 4/3 (c) 3/2 (d) 3 Answer-b (3)
(a) 5 m (b) 10 m (c) 15 m (d) 20 m Answer-c (24)
(a) Acceleration due to gravity (b) Height of the liquid column (c) Area of the bottom surface (d) Nature of the liquid Answer-c (8)
d1 is counterpoised by of weights of density d2 in air of density d. Then the true mass of the body is (a) M …
ρ and that of water is σ . What will be the decrease in volume when a mass M of ice melts (a) M/( σ – ρ ) …
900 kg/m3. The force that acts on the base of the vessel due to the liquid is(g=10 m/sec) (a) 3.6 N (b) 7.2 N (c) 9.0 N (d) 14.4 N Answer-b (83)
(a) Limiting point (b) Yield point (c) Breaking point (d) None of the above Answer-c (6)
(a) ab (b) bc (c) cd (d) oa Explanation- (b) At point b, yielding of material starts. (40)
(a) Rubber, brass and steel respectively (b) Brass, steel and rubber respectively (c) Steel, brass and rubber respectively (d) Steel, rubber and brass respectively Answer-c (7)
(a) Sand R (b) T and S (c) R and S (d) S and T Answer-d (25)
(a) A is brittle but B is ductile (b) A is ductile and B is brittle (c) Both A and B are ductile (d) Both A and B are brittle Explanation-(b) In ductile materials, yield point exist while in …
(a) 10 m (b) 20 m (c) 60 m (d) 30 m Answer-b (7)
(a) Weight hung and length increased (b) Stress applied and length increased (c) Stress applied and strain developed (d) Length increased and weight hung Answer-c (5)
16. The diagram shows the change x in the length of a thin uniform wire caused by the application of stress F at two different temperatures T1 and T2. The variations shown suggest that (a) T1 > T2 (b) T1 < T2 …
(a) 9×1011 (b) 8×1011 (c) 10×1011 (d) 2×1011 Answer-d (6)
(a) Attracted when x lies between A and B and are repelled when X lies between B and C (b) Attracted when x lies between B and C and are repelled when X lies between A and B (c) Attracted …