TM TM JEE (Main + Advanced) 2017JEE (Main + Advanced) ENTHUSIAST 2017 COURSE Path to success KOTA (RAJASTHAN ) ENTHUSIAST PHASE :COURSE [TOAS] Path to success KOTA (RAJASTHAN) PHASE : [TOAS] PHYSICS QUIZ # 01 Single Correct Answer Type 7 Q. [Marks 3 (–1)] 1. A cylindrical vessel filled with water is released on an inclined surface of angle as shown in figure. The friction coefficient of surface with vessel is µ (< tan ). Then the constant angle made by the surface of water with the Fixed incline will be - (A) tan–1µ (B) –tan–1µ (C) + tan–1µ (D) cot–1µ 2. A container has a hole at a height of 2m. If the time taken by the efflux to strike the inclined plane perpendicularly is 1 sec. Then the height of liquid level initially is (Take g = 10 m/s2) :- 2m 45° (A) 2 m (B) 5 m (C) 7 m (D) 3 m 3. A small hole is made at the bottom of a symmetrical jar as shown in y figure. A liquid is filled into the jar upto a certain height. The rate of descension of liquid is independent of the level of the liquid in the jar. x Then the surface of the jar is a surface of revolution of the curve - (A) y = kx4 (B) y = kx2 (C) y = kx3 (D) y = kx5 4. A wooden block, with a coin placed on its top, floats in water as shown in figure. The distance and h are shown there. After some time the coin falls into the water. Then - [IIT - 2002] Coin h (A) decreases and h increases (B) increases and h decreases (C) both and h increase (D) both and h decrease 5. A solid cone of height 25 cm and base diameter 25 cm floats in water with its vertex downwards such that 20 cm of its axis is immersed. The additional weight that must be placed at the centre of the base such that the cone now is completely immersed in water is - (A) 1 kg (B) 2 kg (C) 3 kg (D) 4 kg 6. Some air is pumped out a tube one end of which is immersed in water. The water in the tube rises above tap A. Now tap A is opened then - (A) Water will flow from tap and level of water increases A (B) Water will flow from tap A and level of water is same (C) Water will not flow from tap A (D) None of these PHYSICS / Quiz # 01 E-1/3 = 45º and u = 10 m/s then the time after projection of balls when they are at minimum separation with each other - 1 (A) sec. If h = 20 m. 8.06 × 10–2 N/m. When the length x × 10–2 m of the tube is immersed in liquid then the liquid level inside and outside the capillary tube becomes the same. [Marks 4(0)] 1.6 kg of size 10 cm × 10 cm × 10 cm is floating over an unknown liquid as shown in the figure 4 cm How much minimum mass (in gm) should be kept on the wooden block so that it completely submerges into liquid ? Numerical Grid Type (Single digit Ranging from 0 to 9) 4 Q. density of ball A is and density of ball B is B = 2 L. The terminal velocity of spheres is- 2 r22 g 2 r12 g r1 (A) (B) 9 9 3 3 3 3 r2 2 r1 r2 g 2 r1 r2 g (C) (D) 9 r1 r2 9 r1 r2 Linked Comprehension Type (1 Para × 3Q. If h = 20 m. Two solid spherical balls of radius r1 & r2 (r2 < r1). (B) 2 sec. A u h u B Ball A is thrown from a point just inside of liquid while ball B is thrown from bottom of tank. A wooden block of mass 0. Assuming all resistances A 3 in motions of balls to be negligible. with the string just taut as shown. [Marks 4(0)] 1. of density are tied up with a string and released in a viscous liquid of lesser density and coefficient of viscosity . A glass capillary sealed at the upper end is of length 0. If density 2 L of liquid is L . (C) 2 sec. TM JEE (Main + Advanced) 2017 ENTHUSIAST COURSE Path to success KOTA (RAJASTHAN ) PHASE : [TOAS] 7.) [Marks 3 (–1)] Paragraph for Question No. (D) None of these 2 Numerical Grid Type (Single digit Ranging from 000 to 999) 1 Q. Two balls A and B are thrown simultaneously with same speed u at same angle with the vertical wall of tank. = 45º and u = 10 m/s then the minimum separation between the balls :- (A) 5 m (B) 10 m (C) 15 m (D) None of these 10. and g = 10 m/s2. If h = 20 m then the maximum value of u so that ball do not collide with each other for any value of :- (A) 10 m/s (B) 15 m/s (C) 20 m/s (D) 25 m/s 9. This tube is immersed vertically into a liquid of surface tension 5.01 × 105 2 ) m E-2/3 PHYSICS / Quiz # 01 . 8 to 10 A large tank containing a liquid is at rest on ground and base of tank is horizontal.11 m and internal diameter 2 × 10–5 m. N then the value of x is : (Assume atmospheric pressure is 1. TM JEE (Main + Advanced) 2017 ENTHUSIAST COURSE Path to success KOTA (RAJASTHAN ) PHASE : [TOAS] 2. Water in a clean aquarium forms a meniscus. Find the time in which the bubble will collapse completely. The coefficient of friction equals 0. The surface tension of water is = 0. 3. On the surface of the bubble we place a small ring of radius r. as illustrated in the figure. which is slowly raised on one end. (r < < R). 2. till which the cylinder will still be in equilibrium.P. surface tension 0. The cylinder lies on a table. h Calculate the approximate difference in height h (in mm) between the centre and the edge of the meniscus.25 × 10+8 N/m2. Find the critical angle of inclination of plates. 4. PHYSICS / Quiz # 01 E-3/3 . The radius of the hole is R/ 2.075 N/m and Bulk modulus 1. Take contact angle = 0°. A large soap bubble has surface tension S and radius R.2. Fill 1/x in OMR sheet. In parallel to the cylinder axis radius R at distance R/ 2 from its center we drilled a hole.08 Nm–1. Take density of air as . Extra Question to be attempted on Sunday 1. Now we prick the film inside the ring. Find x in the figure if the densities of the liquids are in A. A closed tube in the form of an equilateral triangle of side l contains equal volumes of three liquids which do not mix and is placed vertically with its lowest side horizontal . Assume the flow to be steady. non-viscous and incompressible. Air begins to flow out from the hole thus formed. Due to the excess pressure of surface tension find the change in the radius (in Å) of a liquid drop of radius 1 mm.