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ICSE Class X Prelims 2026 : Physics (GEMS Modern Academy, Dubai)

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MOCK EXAMINATION-25-26 PHYSICS Grade:10 Date: February 6th, 2026. Time:2 hours Max Marks:80 [The time stated above is the time allowed for writing the examination. In addition, the first 15 minutes will be the time given for reading the question paper.] INSTRUCTIONS Answer all the questions from section-A and any four questions from section-B. Show all the work clearly wherever required. The intended marks for questions are given in brackets. SECTION-A Question 1. Choose the correct answer. [15X1=15] i) A body is acted upon by two unequal forces in opposite directions, but not in the same line. The effect is that: a) the body will only have rotational motion b) the body will only have translational motion c) the body will have neither rotational motion nor translational motion d) the body will have rotational as well as translational motion. ii) The diagram below shows the path of light passing through a right-angled prism of critical angle 0. The angle C of the prism is: a) b) c) d) 450 600 900 300 Page 1 of 11 iii) If a body of mass 100 g and having a momentum of 20 kgms-1, then its kinetic energy is a) b) c) d) 1000 J 1500 J 2000 J 2500 J iv) A block of glass is pushed into the path of the light as shown below. Then the converging point X will: a) b) c) d) Move away from the slab Move towards the slab Not shift Move towards the left side of the lens v) Two substances, A and B, have the same mass. Substance A has a higher specific heat capacity than substance B. What consequences would you expect when these substances are subjected to the same amount of heat energy? (a) Substance A will experience a smaller temperature change than substance B. (b) Substance A will experience a larger temperature change than substance B. (c) Both substances will experience the same temperature change. (d) Either of them can show a greater change in temperature as the temperature change depends on factors other than specific heat capacity. vi) A magnetic compass is present on a small table, very close to the wall in the room. A man enters the room and switches on the Air Conditioner fitted near the ceiling. He observes that the needle in the compass shows immediate deflection. Identify the most probable reason for the deflection. a) Air blowing in the room. b) Current starts flowing through AC wire concealed in the adjacent wall. c) Vibrations are produced when the Man starts talking to his wife in the kitchen. d) Vibrations were produced due to a file in his hand that fell on the ground Page 2 of 11 vii) In the circuit given below, identify the correct relation between the currents flowing through the 2 , 3 , and 5 resistors: a) b) c) d) current through 2 > current through 3 current through 5 < current through 3 current through 2 = current through 5 current through 5 > current through 3 viii) A radioactive nucleus emits a beta particle. The position of daughter nucleus in the periodic table as compared to the parent nucleus after emitting a beta particle is : a) at the same place b) one place higher c) one place lower d) two places lower ix) In the diagram shown below, the velocity ratio of the arrangement is: a) b) c) d) 1 2 3 0 Page 3 of 11 x) In the diagram below, four cones are depicted, each with a height of 12cm. The position of the center of gravity is indicated by dots located at 9cm, 8cm, 4cm, and 3cm from the apex of each cone. Which of these cones is completely solid? a) b) c) d) 9 cm 8 cm 4 cm 3 cm xi) While entering from medium A to medium B if light slows down then: a) i < r b) i > r c) i r d) i = r xii) Assertion (A): A transformer can increase the voltage of an alternating e.m.f. Reason (R): This is achieved by keeping the number of turns in the secondary coil less than the number of turns in the primary coil. a) Both A and R are true, and R is the correct explanation of A. b) Both A and R are true, and R is not the correct explanation of A. c) assertion is false but reason is true. d) assertion is true but reason is false. xiii) Assertion (A): Ultraviolet radiation is scattered more as compared to the microwave radiation. Reason (R): Wavelength of ultraviolet radiation is more than the wavelength of microwave radiation. a) Both A and R are true, and R is the correct explanation of A. b) Both A and R are true, and R is not the correct explanation of A. c) assertion is false but reason is true. d) assertion is true but reason is false. Page 4 of 11 xiv) The use of MCB is more convenient than a fuse because: a) it avoids the inconvenience of connecting a new fuse wire b) It is much safer for quick responses. c) It takes a very long time for tripping d) both (a) and (b) xv) Which statement about sound waves is incorrect? a) Sound waves can be reflected, refracted and transmitted. b) High pitched sound waves have high frequency. c) Quiet sound waves have a large amplitude. d) Sound waves are longitudinal waves. Question 2. i) Complete the following by choosing the correct answers from the bracket: [6] (a) A pair of scissors is a ___________________[force/speed] multiplier. (b) A boy uses a GPS device to locate his missing friend in a crowded area; the system primarily uses __________ [ultraviolet waves / microwaves] to track the location. (c) In a transformer, the frequency of a.c. voltage__________. [increases/decreases/remains same] (d) If the amplitude of a sound is halved, its loudness becomes_______________. [doubled/one-fourth/halved] (e) If the number of protons and neutrons get interchanged inside the nucleus, they are called _____________. [Isotones/mirror isobars/ mirror Isotopes] (f) Potential energy possessed by a body due to change in its size and shape is called ______________. [gravitational potential energy/elastic potential energy] ii) a) Name the wave used for echo cardiography. [2] b) Give one reason why the waves mentioned in (a) are used for the above purpose. iii) 85 g of water at 300C is cooled to 50C by adding certain mass of ice. Find the mass of the ice required. [2] [Specific heat capacity of water=4.2 Jg -1 0C-1, Specific latent heat of fusion=336 Jg-1] Question 3. i) A fish is looking at a 1.0 m high plant at the edge of a pond. a) Will the plant appear to the fish shorter or taller than its actual height? b) Draw a ray diagram to support your answer. Page 5 of 11 [2] ii) A straight wire lying in a horizontal plane carries a current from north to south. [2] (a) What will be the direction of magnetic field at a point just underneath it? (b) Name the law used to arrive at the answer in part (a). iii) A nucleus 24 11 Na is -radioactive. [2] (a) Write the equation representing -decay. (b) What general name is given to the product nucleus with respect to 24 11 Na. iv) The diagram below in figure shows the arrangement of five different resistances connected to a battery of e.m.f. 1.8 V. [2] Calculate: (a) the total resistance of the circuit, and (b) the reading of ammeter A. v) Why do the farmers fill their fields with water on a cold winter night? [2] vi) State the class of levers and the relative positions of load (L), effort (E) and fulcrum (F) in: [2] (a) a bottle opener, and (b) sugar tongs. vii) A half metre rod is pivoted at the centre with two weights of 20 gf and 12 gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below. [3] Page 6 of 11 (i) Which of the two forces acting on the rigid rod causes clockwise moment? (ii) Is the rod in equilibrium? (iii) The direction of 20 gf force is reversed. What is the magnitude of the resultant moment of the forces on the rod? SECTION-B (Answer any four questions) Question 4. i) A block and tackle system of pulleys has velocity ratio of 5. [3] (a) Draw a labelled diagram of the system indicating clearly, the direction of the load and effort. (b) Calculate the potential energy gained by load of 100 kgf, lifted by this pulley to a height of 5 m. (g = 10 ms-2) ii) Rohit playing a flute and Anita playing a piano emit sounds of same pitch and loudness. (a) Name one characteristic that is different for waves from the two different instruments. (b) If now the loudness of the sound from flute becomes four times that of the sound from piano, then write the value of the ratio AF: AP (AF amplitude of sound wave from flute, AP amplitude of sound wave from piano) (c) Define Pitch of a sound. [3] iii) a) Copy and complete the ray diagram below and write any two characteristics of the image formed. [4] b) State anyone use of the above situation (a) in real life situations. Page 7 of 11 Question 5. i) Name the waves in the electromagnetic spectrum: (a) of lowest wavelength, (b) used for taking photographs in dark, (c) produced by the changes in the nucleus of an atom. [3] ii) Give reason: a) It is easier to turn the steering wheel of a large diameter than that of a small diameter. b) The base of electric press is made thick and heavy. c) Why is the fusion reaction also called thermo- nuclear reaction? [3] iii) A person standing at a distance x in front of a cliff fires a gun. Another person B, standing behind person A at a distance y from the cliff hears two sounds of the fired shot after 2 s and 3 s respectively. Calculate x and y (take speed of sound 320 ms -1). [4] Question 6. i) The figure below shows a dual control switch circuit used to light a bulb. [3] a) Complete the circuit so that bulb is switched on. b) Mark the supply terminals with L and N to indicate live and neutral wires. ii) A boy takes 3 minutes to lift a 20-litre water bucket from a 20 m deep well, while his father does it in 2 minutes. [4] Compare: (a) the work, and (b) power developed by them. (Take density of water = 103kg m -3 and g = 9.8 N kg-1) iii) a) State Fleming's right-hand rule. [3] b) What is the function of a step-up transformer? c) A wire, bent into a circle, carries current in an anticlockwise direction. What polarity does this face of the coil exhibit? Page 8 of 11 Question 7. i) Complete the path of ray PQ through the glass prism ABC as shown in figure till it emerges out of prism. Given the critical angle of glass is 42 . [3] ii) The circuit diagram in figure shows three resistors 2 , 4 and R connected to a battery of e.m.f 2V and internal resistance 3 . If main current of 0.25 A flows through the circuit, find: (a) the potential difference across the 4 resistor (b) the potential difference across the internal resistance of the cell, (c) the potential difference across the R or 2 resistor, and (d) the value of R. [4] iii) The graph shows load against effort for a lever with load and effort on the same side of the fulcrum. (a) Which feature of the load and effort graph must be calculated to determine mechanical advantage? (b) Which class does this lever belong to? (c) Give one example of the lever in part(b). Page 9 of 11 [3] Question 8. i) Study the diagram below and answer the following: (a) Arrange the following pendulums according to their natural frequencies (use < > =). (b) If Pendulum Z is initiated into oscillation, which pendulum among the others will exhibit the highest amplitude of vibration? (c) Give reasons for your answer. [3] ii) A radioactive nucleus X emits an alpha particle followed by two beta particles to form nucleus Y. (a) With respect to the element X, where would you position the element Y in the periodic table? (b) What is the general name of the element X and Y. (c) If the atomic number of Y is 80 then what is the atomic number of X? iii) a) State two conditions necessary for total internal reflection to occur. [3] [2] b) A piece of iron of mass 2.0 kg has a heat capacity of 966 J K-1. Find (i) heat energy needed to warm it by 15 C, and (ii) its specific heat capacity in S.I unit. [2] Question 9. i) Two students are conducting experiments with identical 100 g mass simple pendulums, each raising the bob 5m above the mean position. The graph depicting the relationship between distance from the mean position and velocities is presented in the diagram. [3] Page 10 of 11 (a) Demonstrate, using mathematical calculations, that the path followed by student 1 is devoid of friction. (b) Does the situation involving student 2 exhibit a breach of the law of conservation of energy? ii) How would the sky appear when seen from space? Give reason for your answer. [2] iii) Light of a single color is passed through a liquid having a piece of glass suspended in it. On changing the temperature of the liquid, at a particular temperature, the glass piece is not seen. (a) When is the glass piece not seen? (b) Why is the light of a single color used? [2] iv) The diagram in figure shows a spiral coil wound on a hollow cardboard tube AB. A magnetic compass is placed close to it. Current is switched on by closing the key. (a) What will be the polarity at the ends A and B? (b) How will the compass needle be affected? Give reason. Page 11 of 11 [3]

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