
	Trending ▼ ICSE CBSE 10th ISC CBSE 12th CTET GATE UGC NET Vestibulares ResFinder

ICSE Class X Prelims 2025 : Physics (Presidency School, Nandini Layout, Bangalore) : PHYSICS

8 pages, 0 questions, 0 questions with responses, 0 total responses,

Jeethendra S
K. L. E Society's S. Nijalingappa College (KLE SNC), Bangalore

+Fave Message

Profile Timeline Uploads

Home > gjphysics > F Also featured on: School Page

Formatting page ...

PRESIDENCY GROUP OF SCHOOLS Bangalore/ Mangalore IICSE SCHOOLS) FIRST PREPARATORY EXAMINATION Date: 21/11/2024 NOVEMBER 2024 Subject: PHYSICS Class: X Time allowed: 2 Hours Max. Marks: go Answers to this Paper must be written on the paper provided separ"ely. You will not be allowed to write during the first 15 minutes This time is to be spent in reading the Question Paper. The time given at the head of this paper is the time allowedfor writing the answers Attempt all questions from Section A anyfour questionsfrom Secdon B. The intended marks for questions or parts of questions are given in brack s // Section A (40 Mark') (Attempt all questions from this secdon) uestion 1: Choose the correct answers to th questions. write the correct answer only.) i fr the v [15] i. If an object is moving on a circular path: a) Its acceleration is zero b) Its velocity is constant c) Its direction of motion is fixed Its direction of motion changes continuously. ii. If A and B of the same mass can climb the third floor of the same building in 3 mimnes and 5 minutes respectively, then the ratio of their powers A : B in an ideal situation is: 9:25 iii. Which of the following is a class Il lever. a) Spade for tuming the soil b) Rowing the boat using a long handle oar b). Bottle opener d) Knife iv. The critical angle glass air is 450 for light of yellow colour. Then critical an e for blue li n is: b) > 450 < 45 0 C) 450 d) None of these v. Assertion radiations are scattered more as to radio wave. Reason Wavelength of infrared is more than wavelengh of radio wave. a) Both A and R are true b) Both A R are false c) A is false but R is true d) A is true but R is false 1 of 8 The tollowtng diagram ISdisplacement time graph of a wave travelling in a string with velocity 10 frequency and wavelength of the wave are: o.oa Time a) SOHz . 0.2 m b) 50Hz,O.lm d) IOHz,O.2m c) IOHz,O.5m vii. V graph of a metallic conductor is given below. The slope of this graph will give: a) Resistance c) Resistivity b) Conductance d) conductivity The unit of the physical quantity obtained from a) joule ix. x. xi. xii. b) ampere c) tesla d) volt Latent heat, when supplied to a substance increases: a) Temperature of the substance b) Density of the substance c) Kinetic energy of the particles of the substance d) Intermolecular spaces in the substance. A machine in which the displacement of the load is more than the displacement of the effort, such a machine: a) Generally changes the direction of the effort b) Acts as a force multiplier c) Gives gain in speed d) Both (a) and (b) Which of the following arrangement of a , and y radiations show the ascending order of their ionization power? John hears an echo of his own voice from a distant hill after I second. The speed of sound in air is 340 m/s. The distance of the hill from John is: a) 340 m b) 170 km c) 17m d) 170m Page 2 of 8 xiii. from In the figure given below when the key is pressed a current passes in the wire in the direction deflect towards: A to B that is from South to North. The north pole of the compass needle will b) North d) West a) East c) South The lever for which MA< I has: a) Fulcrum at the midpoint between load and effort b) Load between effort and fulcrum c) Effort between fulcrum and load d) Load and effort acting at the same point. xiv. In a step up transformer: xv. a) Ns=Np 1. c) Ns<Np Ouestion 2: Complete the followingby choosingthe correct answers from the bracket: a) The mass (m), linear momentum (p) and kinetic energy (K) of an object is related as b) In a single movable pulley, if the effort point moves up by x cm distance, the load point moves up . (x cm / x/ 2 cm) by c) Assuming all lenses shown below are of the same material, the lens which has the maximum power is .(P/Q) d) Ultraviolet rays are not used for e) Pitch of the sound depends on . ( killing erms / photogaphy at night) . ( amplitude / frequency) f) The rise in temperature of fuse wire depends upon length of the wire) ii. iii. ( current rating and radius / A small pin fixed on a table top is viewed vertically from a distance of 50 cm. By what distance would the pin appear to be raised if it is viewed from the same point through a 15 cm thick glass slab held parallel to the table? ( R.I of glass = 1.5) In what way does the temperature of water at the bottom of a water fall differ from the temperature at the top? Give reason. Page 3 of 8 [2) i. ii. Ouestion 3: Copy the diagram and complete the path of the ray: iii. How will you differentiate between convex and concave lens by looking at the printed page? In the transmission of power, the voltage of power generated at the generating station is stepped up from I I kV to 132 kV before it is transmitted why? iv. Find the equivalent resistance between A and B: 30Q v. A 20 g solid at 500C is heated with a burner which supplies heat at the rate of 2 J/s. The given figure shows its temperature time graph. Calculate the specific heat capacity of solid. (2) 140 120 100 80 60 5 40 20 o vi. 10 15 20 25 30 35 Time (min) A radioactive nucleus undergoes a series of decays according to the sequence: (2) 11 If the mass number and atomic numba ofX3 are 172 aryl 69 and atomic number of X? 4 of 8 whatis mag A, B and C are three forces each of magnitude 4 N acting in the plane of paper as shown in figure. Point O lies in the same plane. a) Which force has the least moment about O? 0.8m c O? about moment greatest the b) Which force has c) Name the forces producing clockwise moment. vii. the Section B (40 Marks) (Attempt any 4 questions from this uestion 4: a) Draw a neat labelled diagram of a block and tackle system of pulleys having velocity ratio 3. In your diagram indicate clearly the points of application and direction of the i. load L and effort E. b) If u. 50 kgf and efficiency = 90%, then calculate mechanical advantage. Figure below shows the regions of the electromagnetic spectrum. Two regions have not been named and enlargement of the visible region is also shown. Radio waves Ult violet Mi rowaves x-rays A: Visible a) Name the regions A and B. b) State the name of the colour of the light that is found : l. At the end L of the visible spectrum and 2. At the end M of the visible spectrum iii. The diagam below shows a point source P inside a water container. Four rays A, B, C and D starting from the source P are shown up to the water surface. Show in the diagam the path of these rays aner striking the water surface. The critical angle for water air surface is 480. AB C 48 Page 5 of 8 Water [3] vestion 5: i. a) ( l) A current is passd in the conductor in downward dirwtion and the cardboard is tapped. Show the setting of iron filings on the cardboard and draw arrows to direction of magnetic field lines. (2) Name the law used by you to find the direction fieldline. b) Name the principle of A.C generator. (3) the a) Yvmatis the other name given for nuclear fusion? Give reson. b) Which of the isotope of uranium is easily fissionable. lii. Complete the following ray diagam using three State any two characteristics of the image formd rays to 0Main F2 image. 2F2 Ouestion 6: 1. ii. In a metre rod half of it is made of copper and rest half of steel. Weights of corpa steel are 9 N and 8 N respectively. Is the centre of gravity of the rod at its geometric If 1 t whae it is? A diver in water looks obliquely at an object AB in air. (3) c a) Does the objwt appear taller, shorter or of the same size to the diva? b) Show the path of the two rays AC and AD starting from the tip of the obj tas it towards the diver in water and hence obtain the image of the objwt. lii. i. A wire is between two bridges A and B. A small piece of paper of shape (called rida) [4) is placed at the middle of the wire. a) When the stem of a tuning fork P is placed at the bridge A the rider ml)' ', rates. Name type of vibration. Give reason. b) The rider flies away when another tuning fork Q is at the bridge A. Name type of vibration. Give Question 7: A 8 cm tall object is perpendicular to the principle axis of a convex of The distarwe of the object from the lens is 30 . Find size of the image fornrd. 6 of 8 25 [3) ii. at A diagram given alongside shows a ski jump. The skier weighing 60 kgf stands ski jump. He moves from A and takes off for his jump at B. A at the top of IS m the skier between A and B. a) Calculate the change in gravitational potential energy of calculate the speed at which b) If 75% of the energy in part (a) becomes kinetic energy at B, 2 the skier arrives at B. (Take g = 10 m/s ) called? 111. a) A substance has zero resistance below 1 K. What is such a substance on a 110 V b) Find the cost of operating an electric toaster for 2 hours if it draws 8 A current circuit. The cost of electrical energy is 6.50 / kWh. Ouestion 8: i. ii. iii. moving A boy standing in front of a cliff, clap once and an echo is heard after 5 second. On 85 m closer to the cliff he claps again and hears an echo after 4.5 seconds. Calculate: a) The distance of the boy from the cliff to his initial position. b) The speed of sound. State how the two resistors are joined with a battery in each of the following cases. When: a) Same current flows in each resistor. b) Potential difference is same across each resistor. c) Equivalent resistance is less than either of the two resistances. a) A calorimeter of mass 50 g and specific heat capacity 0.42 J/ g oc contains some mass of water o at 20 PC. A metal piece of mass 20 g at 100 c is dropped into the calorimeter. After stirring, the o final temperature of the mixture found to be 22 c. Find the mass of water used in the calorimeter. Specific heat capacity of the metal piece 0.3 J/ g oc, specific heat capacity of water 4.2 J/ g oc. b) It is generally cold after a hail storm than during and before the hail storm. Give reason. i. Ouestion 9: a) Observe the diagam given below and state whether the bulb will glow or not whal we switch on key (K). Bulb From A, C, mitb 230 b) Is it safe to handle the bulb when the switch is off? c) Give a reason for your answer in (b). Page of8 [3) it. lil. Name the law on which What is the principle of method of mixture? What other name is given to it? is this principle is used. a) 6.4 kJ energy causes a displacement of 64 m in a body in the direction of force in 2.5 s. 1. Calculate the force applied 2. Calculate its power. b) For the same kinetic energy of a body what should be the change in its velocity if the mass is increased four times. Page80f8 [3]

Formatting page ...

gjphysics chat

Horizontal lines at:
Guest Horizontal lines at:
AutoRM Data:
Box geometries: