¿k W 2012-13 x Í (I) <D 12Ô k X qWF Ô Á b TBk 15 h W Å a 4W ± Ó W T8µ  8£6 × ± Ó D DW8 C , B , A ; ¯D T8µ  - <k 1 1 6 d D» 9 8£ XDq a ;Dc l)< )4W X 6 ÏÅ Paper Code ---- B 9 8£ Note:- You have four choices for each objective type question as A, B, C and D. The choice which you think is correct; fill that circle in front of that question number. Use marker or pen to fill the circles. Cutting or filling two or more circles will result in zero mark in that question. (D) (C) (B) (A) DH W Four Three Two One Êx[ WD Êx[x8W ÊxX ÊxUKD Rotatory Vibratory Circular Random motion motion motion motion Q. 1 QUESTIONS u 8c 4µ\ s 8 a210.0g The number of 1 significant figures in 210.0 g are 8 /8 ©´ m(OÏ* u 2 The spinning motion of a body around its own axis is called One Newton(N) is equal to u Rate of change u + ( ¢ @fc Sa p *x 3 4 of momentum can be written as e + u fxD ~ BN FHDà u+( 5 The magnitude of Resultant force (F) is given by N m-1 Kg-2 u N m Kg-1 (, *+[ ¾S.I 6 The S.I unit of gravitational constant is +( D 5c u+*- k* @Ç + u fxD ~ fW ¨* y y h, , 7 × s @f c lU 8 Formula for orbital velocity of satellite at height h is + ( p *x RD DW Momentum Torque Power < Energy Rate of doing work is called u One pascal is equal to pgl pgh Pga u & pgv 9 Ãc T<8 k 10 Up thrust of liquid is given by ( @,I8 DW8 ( m-*e P 5 u+* ,( NÏ* @,I8 * o(M) 8 U&8W P 5 u+( 6u Pa 11 6 The relation between coefficient of volume expansion and linear expansion is Temperature h W Å0 .D Time Length Area Rate of flow u Ê Ô S c v ;D 8Z 12 of heat is inversely proportional to ¿ k W 2012-13 x Í (I) <D Ô Á b TB k Ì 63Ô @ 2:45 h W wzZ X X X X X XX X X XX X X X X XX X z Part ------------------------------- I 2. Answer any SIX parts from the followings:- 6 T 6 m8W Q Á VD Êx[ WD DW8 ÊxX º) R* * 6 m8W Q Á u+( HB DW8 ~ Æ Z b Ð ðÃÐ ~ sf `gŠ X 2 X,™ (12) (- * DW8 yc©k j( *+ 6 yc 4WD 8O CS k DW8 [ (ii) 6 m8W Q Á VD l (iv) (i) 8 DW8 l (iii) 6 yc F+W DW8 F^ (v) (vi) 6 -¸A Á c H8 DW8 yc Á Å8 (vii) 6 dZ c HDÃE[o ³x< [ WW fW c H8 D * 6u & 8D 8W y y r ,, | Z XW DW8 u y y m Hk © ©i 8W Hk U8 (viii) 2 £ U c HD à (ix) (i) Define base and derived quantities. (ii) Describe scientific notation? Give an example. (iii) Differentiate between physical balance and electronic balance. (iv) Differentiate between circular motion and rotatory motion. (v) Define scalars and vectors. (vi) Differentiate between distance and displacement. (vii) Define limiting friction and write its mathematical form. (viii) For a body of mass "m" moving in a circle of radius "r". If its velocity is doubled, what will be the effect on value of centripetal force. (ix) Calculate the value of force acting on a body of mass 2 kg and produces an acceleration of 2 ms-2 in it. 3. Answer any FIVE parts from the followings:- 6 -c 7 8 6 × ' < d 4< 6- 8 DW8 [ HD Ãu ¥D W8F% X - axis 6 d c RD y y F, ,HD à (i) UD5x (ii) l ( x * M* *@ o(, D5 [H 4k+ (iv) SI H8 DW8 yc RDW (vi) 6u & 4< = = c y y g, , (v) (viii) 6 U O8 D H ¶Åc < 8 (vii) 8 6u &U T£ 4 Í2 i 6 UDW ðÃÐ ~ sf `gŠ X 3 ÆZ X ,™ (10) (i) A force "F" is acting on a body at an angle 6 -A Á c H8 DW8 yc Vk © (iii) with x-axis. Write the magnitude of horizontal and vertical components of the force. (ii) On doubling the moment arm, find its effect on the value of torque. (iii) Define law of gravitation and write its mathematical form. (iv) Why are communication satellites stationed at geostationary orbits? (v) Why is the value of "g" different at different places? (vi) Define work and write its S.I unit. (vii) Write the names of any four forms of Energy. (viii) A machine does 4 Joule of work in 2 sec, calculate its power. 4. Answer any FIVE parts from the followings:- 6u 4< [d m 6 V» T8 l X ,™ 6u (ii) (iv) 6 6 -A Á c H8 DW8 6 yc @f c v ;D 8Z (vi) 6 U c £;D 8Zc v 6u +9 #8 4<Å g Z Z× k ðÃÐ ~ sf `gŠ X 4 ÆZ 8 c ;2k 6u 8~¬D 8 (10) 8~¬D 8 k (i) f'8 W v &D8Z ¹ cP 8 x (iii) H (v) 6 V » Q Á [F ÎDW8 [ Î (vii) (viii) (i) On what factors pressure of a liquid depends?. (ii) Define principle of floatation. Why a wooden block floats on surface of water?. (iii) Write any two uses of thermal expansion in our daily life. (iv) On what factors evaporation of liquid depends?. (v) Calculate the value of latent heat of fusion of 4 kg of ice at (vi) Define rate of flow of heat and write its mathematical form. (vii) Differentiate between land and sea breezes. (viii) Why is it not advisable to wear dark colour clothes in summer season?. (P T O ) - - ( 2 )- - xzŠ X X XX X XX X X XX X X X X XX X z 7x3=21 X,™ Æ ] ÑZÎ& Ð ðà Part ------------------------------- II Note: Attempt any Three questions. c P 8 6 4 6 UH k Z /J 3 8W [XW c Z 8 6 5 Å c l 9 5. (a) Derive Second Equation of Motion with the help of Graph. (b) 4 Find the mass of a small stone by a Physical Balance. 3 6 1+3 xD~ H8 DW8 yc HD Ãj [o 8 6 6 6UVFW Á /6 4.4N DW8 3.8NM 4DWB D YÅ 4 DWB [W Á/ 3 6. X ^â (a) Define Centripetal force & Derive its formula. 9 1+3 (b) A Picture frame is hanging by two vertical strings. The tension in the strings are 3.8 N & 4.4N. Find the weight of the picture frame. 3 2 KE=1/2mv 1+3 8 yc < ¢c 850 Å F +( D5c H8 6 D I 6 Uq ¨* 3 2 7. (a) Define kinetic Energy and prove that KE=1/2mv . 6 fxD ~ 1+3 &< Å 8Dµ <D @ * k+ 9 1+3 (b) A Polar satellite is launched at 850 KM above Earth. Find its Orbital Speed. +( < c H8 ³ 2.55gcm-3 zR*B cM ( + *- 8 6 7 3 2k DW8 yc 8 6 8 H8 DW8 306g Hk 9< M j W 5 9 UU&8W 3 8. (a) Define Pressure. Drive an expression for the pressure in liquids. 1+3 (b) A Cube of glass of 5cm side and mass 306g has a Cavity inside it. If the density of glass if 2.55gcm -3. Find the volume of the cavity. 1+3 D 3 3 6 ; 8W c v &D8ZjvD UØ8 HADW8 yc v &D8Z 8 6 9 (,* 8 1mm Å0 c H8 Å ¸ HD à 10,000 N H8 D 1 9 <( 6 UgWB k (Ñ* 9. (a) Define thermal expansion and derive an expression for linear thermal expansions in solids. (b) A steel wire 1 m long has cross sectional area is stretched through 1mm by a force of 10000 N. Find the Young's modulus of the wire. Part ------------------------------- III Attempt any two Questions 5 6 U"W 1" VFW U 1+3 3 xÎX X XX X XX X X X X XX X X XX X z (Practical Part) 6 5x2=10 'T'8 xP 5 × ± dD AV8FW8 x x ;f8µW Å Å 6 < Q8 6 VF 8i 50cm B 8D 6 10 10. A meter rod is balanced at 50 cm. Weights are suspended as shown in the fig. Find unknown weight (W 1) by using principle of moments. D 5 ÙDW i8W ¼* * ÅFm) ¸ ÇDW D F 0.02cm 6 m8W Q Á D 5 <( + **W8 F X 11 6 U 11- Differentiate between positive and negative zero error. Apply zero correction on a cylinder of diameter 0.81 cm measured by a vernier calliper having positive zero error 0.02 cm. Find corrected dimater of cylinder 5 6 D < + S : P 5 P8 ͱ V D h W DW8 6 12 12- Draw a graph between time & tempeture when ice is converted in to steam by slow heating with the help of following table. time (min) 0 Temp(C0) -30 5 2 4 6 8 10 12 14 16 18 20 22 24 26 -20 0 0 0 20 40 60 80 100 100 100 100 120
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