Page 1 :
A spring of torce constant 800 N/m has an extension of, , 5 cm. The work done in extending it from 5 cm to 15 cm is, (b) 8J, (a) 16JI, 2002, (c) 32J, (d) 24J, , A wire fixed at the upper end stretches by length, by, applying a force F. Thework done in stretching is 12004, , (a) 2F, , (b) F, , (c), , 2, , Spherical balls ofradius R° are falling in a viscous tluid of, viscosity 'n' with a velocity 'v". The retarding viscous force, , (d), , Pi P2, , Liquid1: P, , (d) PP3 P2, , 2004, , 11., , A capillary tube (A) is dipped in water. Another identical, tube (B) is dipped in a soap-water solution. Which of the, following shows the relative nature of the liquid columns in, , 2008], , the two tubes?, , A, , If S' is stress and Y is young's modulus of material of a, , -, , wire, the energy stored in the wire per unit volume is, , (a), , (c), , 6., , (b), , 2Y, , S, , 2005, , 2sy, , -, , (a), , --=***=-*, , (d), , s2, 2Y, A 20 cm long capillary tube is dipped in water. The water, , B, , rises up to 8 cm. Ifthe entire arrangement is put in a freely, falling elevator the length of water column in the capillary, , 20051, , tube will be, (a), , 10 cm, , (b) 8 cmn, , (c), , 20 cm, , (b), , (d) 4 cm, , A wire elongates by / mm when a load Wis hanged from it., If the wire goes over a pulley and two weights Weach are, , hung at the two ends, the elongation of the wire willbe, (in mm), 2006, (b) 2/, , (a), , (c), , zero, , (d)/2, , (c), , Ifthe teminal speed ofa sphere of gold (density= 19.5 kg/m'), is 0.2 m/s in a viscous liquid (density = 1.5 kg/m'), find the, terminal speed ofa sphere of silver (density= 10.5 kg/m') of, the same size in the same liquid, (a), , 0.4m/s, , (b) 0.133 m/s, , ***, , ---, , .--JJ..., ******, , 2006], (c), , 0.1 m/s, , (d)0.2 m/s, , A spherical solid ball of volume i s made of a material of, density p,. It is falling through a liquid of density P, (P,<, P). Assume that the liquid applies a viscous force on the, ball that is proportional to the square of its specd v. i.c.,, k (k0), The terminal speed of the ball is, , 2008], , Liquid ;, , ()PP2 P, , If two soap bubbles of different radii are connected by a, , (c), , jar is, , inversely proportional to 'R° but directly proportional, , air flows from the smaller bubble to the bigger, air flows from bigger bubble to the smaller bubble till, the sizes are interchanged, air flows from the bigger bubble to the smaller bubble, till the sizes become equal, there is no flow of air., , k, , (b) PP3P2, , to velocity 'v', tube., , Vg(P1 P2, , 2, filled with two non-mixing liquids 1 and having, of a, made, solid, ball,, densities P, and, p, respectively. A, to0, comes, It, material of density pa, is dropped in the jar., of, Which, cquilibrium in the position shown in the figure., A, , (a) P, , to', , (a), (b), , (d), , 2008], , k, , the following is true for p. P,and p3?, , is, 2004, (a) inversely proportional to both radius R' and velocity 'v, (b) directly proportional to both radius 'R' and velocity'v, (c)directly proportional to 'R° but inversely proportional, , acting on the spherical ball, , (d), , VgPL, , (b), , k, , (c), 10., , (d), , Vg(Pi P2, , (a), , (d), *

Page 2 :
', , ' ' ', , CU, , D, , .E