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ICSE Class X Mid-term 2024 : Physics

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THE BISHOP'S C0-ED FIRST TERMINAL CLASS 10 SCHOOL,UNDRI EXAMINATION 2023 -2024 PHYSICS TIME: 2 HOURS Answer to this paper must be written on the MAX. MARKS-80 paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the question paper. The timegiven at the head of this paper is the time allowed for writing the answers. Section Ais compulsory. Attempt any four questions from Section B. The intended marks for Questions or parts of questions are given in brackets SECTION A (Attempt all questions from this section) Question 1. Choose the correct answers to the questions from the given options. [15] (Do not copy the question, write the correct answers only.) ()According to the diagram given below, which of the followingstatement is incorrect? (a)Speed of light ray PQ is equal to the speed of light ray ST (b)Speed of light ray QR is equal to the speed of light ray RS (c)Speed of light ray PQ is greater than the speed of light ray RS (cSpeed of light ray QR is greater than the speed of light ray ST (ii) What is the conversion of one form of energy to another in a Dynamo? (a) light energy two electricenergy (b) heat energy to electriC energy (c) chemical energy to electrical energy (d) mechanical energy to electrical energy (iii) The source of ultraviolet light is: (a) Electronic devices (b) electric bulb C) red hot iron ball d) mercury vapour lamp (iv) Choose the incorrect statement: colour of light (a)The lateral displacement depends on the light (b) angle of deviation depends on the colour of (oYshift is independent of the colour of light (d) critical angle depends on the colour of light 1of 6 depends on: about a given axis force of morment the axis (v) The distance of force from perpendicular ax1s (a) onty on themagnitude of force force from the of distance perpendicular (b)only on the the axis nor on the from the force perpendicular distance (c) neitther on it's and force (d on both the centripetal force is: (vi)Direction of centre (a) towards the centre the (b)away from motion (c) parallel to direction of direction of velocity (d) paralielto frequency of this wave is: The A. 0.1 of gamma rays is (vii) The wavelength (a) 3 x 1020 Hz (b)3 x 1019 Hz (c) 3 x 101# Hz (d) 3 x 1021 Hz remote (vii)Radiations used in control of televisions are: (a) ultraviolet (b)X-rays (c) infrared (d) radio waves Steps to of glassis 1.5. index refractive and the in air is 3 x 10 ms light of speed The (ix) glass are given below: ms! find the speed of light in 1.5 x 3 x 105 1. Speed in glass = )/ 1.5 2. V = (3 x 108 ms ms! 3. V = 2x 108 speed of light in glass. steps to find the of 4. V =4.5 x 10 m_ sequence correct option whicth has the Choose an (a) 1and 3 (b) 2 and 3 (c) 1in 4 adistance 60 (d) 2,1 and then 4 distance 15 cmfrom it, at a at placed image of an object (x) A lensforms the focal length of lens is: Cm in front of it. The (a) 10 cm (b) 20 cm (c) 30 cm (d) 40 cm through minimum deviation of 360 suffers which light incidence for aray of (xi)The angle of is: an equilateral prism (a) 480 (b) 360 (c) 600 (d) 900 pair of media are: critical angle for agiven incident (4) thickness of medium the affecting factors (xii)The angle of (2) colour of light (3) (1)temperature alternatives: Choose the correct 2 of 6 (a) onty options i and 2 (b) only options 1,2and 4 ()only options 3and 4 (d)only options 2 and 4 (xil) Assertion: Aray of light travellng from a rarer nedun to a deuser medlum stows kown and bends away from the nomal. When it travels fronn a dense medum to a raer medluo, speeds up and bends towards the normal, Reason: The speed of light is groater In a rarer mediun than a denver medum. (a) both assertion and reasonare true (b) both aNserton and reason are false (c) aNsetion is false, but reason is true (d) assertion is true reasOn Is falze (x0v) Convex lensfocuses a real polnt sized inmage at focus, the objoct Is placed at: (a) at focus (b) between and 2 (c) at Infinity (d) at 2 (xV) A single movable pulley ha: (a) velocity ratlo 2 and actual mechanlcal advantage 2 (b) velocity ratio 2 and actual mechanlcal advantage less than two (c)velocity ratlo 2 andactual mechanical adlvantage greater than two () velocity ratlo I and mechanical acdvantage I Questlon 2. () (a) Name the prism which is used to glve the spectrumof ultraviolet radlatlons., (b) Flnd the klnetic energy of a body of mass 10 kg and momentum 20 ky ms (c) State one use of gamna radiatlons. () [3] Apleceof stone tled at ono end of a stringIs whirled na horlzontal clrcle wlth uniform speed by hand. (a)What Is the dlrectlonof accoleratlon of stone at any lnstant? (b) Whlch force provldes the centripetal force requlred for clrcular motlon? (l) [2] How Is the klnetlc energy of a moving vehicle affected if: (u) Its mass is tripled (b) Its velocity ls reduced to 1/3 of its initial velocity (v) Draw self-explanatory dlagranm to show the princlple of conservatlon of energy in a slmple pendulum. (V) [2] [2] An effort of 50 kgf Is applled at the end of the lever of second order, whlch supports a load of 750 kgl, such that the load Is at a distanceof 0.1 m from the hlnge. Flnd the length of the lever. [2] (vl) Auniform metre scale is balanced at 60 cm mark, when welghts of5 gf and 40 gt are suspended at 10cm mark and 80 Cm mark respectively, Calculate the welght of the (vl) metre scale. [2] Why does the sky appear blue on the earth, but black on the moon? [2] [2] The power of a lens is 2.5 D. (i) (a) Find its focal length (b) Name the type of lens. (i1) (i) (iv) Draw a diagram to show a block and tackle system of pulleys having avelocity ratio 3. [2] Mark the direction of L, E and T. A glass slab of thickness 18 cm and refractive index 3/2 is placed on a printed [2] matter. Find the shift of the printed matter. Awave has a wavelength 500 . (a) Name the wave [2] (b) State its one use (v) The steering of acar has a radius of 15cm.What is the torque produced by a force of [2] 40Non the steeringwheel? SECTION B (Attempt any four questions) Question 4. of a lens L. The () The diagram below showS an object AB placed on the principal axis virtual, and two foci of the lens are F1 and F2. The image formed by the lens is upright, diminished. A F F (a) Draw the outline of the lens used and name it. [3] AB (b) Draw two rays to locate the final image of Earth in an elliptical path. (a) Explain the motion of the moon around the (ii) and its direction, how does the centripetal (b)With reference to the magnitude of force [31 force differ from the centrifugal force? respectively, rays A and B of red and violet light (i) The diagram below shows two parallel [4] incident from air on air-glass boundary. A B RED VIOLET AIR GLASS the glass. showing the refracted rays for A and B in (a)Copy and complete the diagram rays differ in glass? (b) How do the speeds of the answer. glass parallel? Give a reason for your (c)Are the two refracted rays in of glass differ for the two rays? (d) How does the refractive index Question 5. from a height of 80 m. top. (i) A body of mass 450 g falls possessed by the body when it is at the energy potential the Calculate (a) which it strikes the ground. (b)State the kinetic energy with (c) State the principle involved. 4 of 6 [3] ( ) Redrawand angle is 420) complete the path of the ray AB till it A emerges out of the prism. (Critical [3] PA3 (iii) (a) Explain why the (b) Classes III leversmechanical advantage of th class III is always less than 1. (c) Which type of have mechanical advantage less thanlever 1. lever has a mechanical Why are they then used? (d) What change can advantage be always its mechanical advantage?made in this lever (as mentioned bymore than 1? you in part c) to increase [4] 9u stion 6. () (a) s it possible to have the centre of gravity outside the body? support your answer. Give an example to (b) Where is the centre of gravity of a solid cone situated? [3] (ii) The diagram (not to the scale) below drawn shows the graphical relation between the angle of deviation and angle of incidence when of angle 62 of a light passes through a certain glass material. triangular prism [3) angle of deviation (5) si (0,0) 46 angle of incidence (i) (a)State the angle of minimum deviation of this prism and its incidence. (b) Calculate the value of 'x' corresponding angle of (iii) An object 2 cm tall is placed on the axis of a convex lens of focal length 5 cm at a distance of 10 cm from the optical centre of the lens. [4] (a) Find the nature, position and size of the formed. (b)Which case of image formation by conveximage lens is illustrated by this example? Question 7. (i) Derive a machine. relationship between mechanical advantage, velocity ratio and efficiency of a [3] (ii) Name the radiation which: (a) has a wavelength of 10000 (b) can be detected by a solution of silver chloride. (c) is used for sterilizing purpose. (ii)State the position of the image when the object is placed : (a) between optical centre and principal focus of a convex lens. (b) anywhere on the principle axis of a concave lens. Also mention the sign and value of magnification in the above cases. 5 of 6 [3] [4] ********** [4] downward kgf 150 ***k*** ****k load of k***** * required is inkgf 50 used lifta to his head. load carryinga on light of the using casesfollowing 6 of 6 ***k*** system. the the the (d) (c) A(c) boy up stairs. climbing (b)A coolie on the walking (a)A man wall. pushinga expression: mathematical done or not, in the then you between the the wil What colour. placed in onseen State What isslit (ii) (c) (b)A iSwhat (a) Complete the diagram to the show effect of work is whether youconclusion do draw theabout of light in white nature on the observe screen? the and prism screen to only pass the prism on the K**k******k ** * of the efficiency pulley advantage mechanical the (b) done work the by effort the (a) the moved by distance effort Calculate: direction. througha height vertical of (i)A pulley wiathsystem The 20m. effort isof4 ratio velocity ground [3] relevant (a)? part green Screen. toand beam show Prlsm Screen s lignt White (3] prism. aface of one striking on source S GREEN froma light white beamof thin showsa + BLUE+ fiqure The Quest on 9. (i) RED GAE N +BLUE + GLASS PRISM RED AIR emergent rays. the refracted and diagrams by drawing the complete the and Copy prism. aOn(b) slab glass sided parallel A (a) [4] (blue+red+green) incident on light showsa below [3] given figure digested getting The following: [3] (iii) food celelectric l an(b) (c) air. burns in ribbon magnesium (a) A the changes in energy the State (i) mnore have wil body of andB bodiesA Two the for unit the Name (b)(a) () why? momentum and (M> m) and masses e 2K/M iswherK V , quantitym Which energy. kinetic same have body. the energy of kinetic the QuestioD8.

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