Science Physics Past Paper 10 Class 20XX PDF

QUESTION PAPER PHYSICS CLASS SECTION EXAM CODE 10 A 4059693 10 B 4059703 10 C 4059713 10 D...

QUESTION PAPER PHYSICS CLASS SECTION EXAM CODE 10 A 4059693 10 B 4059703 10 C 4059713 10 D 4059723 SCHOOL Anthony Claret School 1. There are 50 questions in the paper. All are compulsory. 2.Darken the circle of your answer completely using a pencil. Do NOT tick or circle the options. 3. Show your working on a separate sheet of paper wherever you need to. 4. Please check your answers carefully before submitting the test. Once submitted, the answers CANNOT be changed. 1  Physics CLASS 10 SET NO 3 Q: 1 Four identical resistors are connected as shown in the figure. What is the equivalent resistance of this combination as measured across X-Y? 1 0.5R 2 R 3 2R 4 4R Q: 2 Which of the following is true about resistors in parallel combination? P. The potential difference across the resistors is the same. Q. The equivalent resistance is less than the smallest of the resistances. R. The current flowing through the resistors is the same. 1 only P 2 only Q 3 only P and Q 4 all - P, Q and R Q: 3 If 'E' is the e.m.f. of the cell, 'V' is the terminal voltage and 'v' is the voltage drop of the cell then which of the following is true? 1 E=V-v 2 E=v-V 3 v=E-V 4 v=V-E Q: 4 A car headlight bulb is marked 48 W 12 V. Can this bulb be used at home in place of a regular electric bulb? 1 Yes, it can. The bulb will glow much brighter. 2 Yes, it can. But the bulb will glow less brightly. 3 No, it cannot. The bulb will burn out. 4 No, it cannot. The bulb will not fit into the holder. 2  Physics CLASS 10 SET NO 3 Q: 5 Shown above is a figure of a wheelbarrow with the position of the fulcrum and points of application of effort and load indicated. Which of the following simple machines belongs to the same class of levers as the wheelbarrow? 1 2 3 4 Q: 6 Which of the following is/are example(s) of class I levers? P. nodding of the head Q. raising the weight of the body on toes R. raising a load by the forearm 1 only P 2 only Q 3 only Q and R 4 all - P, Q and R Q: 7 A block and tackle system having 3 pulleys is used to lift a load of mass 25 kg. If the effort required is 50 N, then determine the mechanical advantage of the system. (Consider g to be 10 m/s 2.) 1 8 2 5 3 3 4 2 3  Physics CLASS 10 SET NO 3 Q: 8 In the pictures below, the load is shown lifted directly and using a simple pulley. What is the role of the pulley in such a situation? 1 It reduces friction. 2 It changes the direction of the effort that needs to be applied. 3 It reduces the distance through which the effort needs to be applied. 4 It increases the distance through which the effort needs to be applied. Q: 9 The diagrammatic representation of the sound wave given out by a siren of a security vehicle is shown below when the vehicle is STATIONARY, MOVING SLOWLY and MOVING FAST. As the vehicle APPROACHES an observer, in which of these ways will the sound heard change? 1 Its pitch will increase. 2 Its volume will decrease. 3 Its frequency will decrease. 4 (There will be no change in the sound heard.) Q: 10 The speed of sound in a certain fluid P is 1600 m/s. It took 4 s for sound to travel a distance of 'x' meters in fluid P. If it takes 5 seconds for the same sound to travel the same distance of 'x' meters in fluid M then what is the speed of sound in fluid M? 1 2000 m/s 2 1280 m/s 3 400 m/s 4 320 m/s 4  Physics CLASS 10 SET NO 3 Q: 11 Shown below is a toy called a slinky. Which of these types of waves can we create using it? P. longitudinal waves Q. transverse waves R. mechanical waves 1 only P 2 only Q 3 only P and Q 4 all - P, Q and R Q: 12 Dinesh took 7 identical bottles as shown in the figure and filled them with different quantities of water. He then blew air over each of the bottles with his mouth and found that the bottle containing the maximum amount of water produced the highest note. Dinesh wanted to relate the experiment that he had done with water to the notes produced by a flute. (A flute is a wind instrument with a blowhole near one end and many smaller holes along the side). From which hole should the air be blown out of for the highest note to be produced when the flute is played? 1 The smallest hole will produce the highest note. 2 The holes in the middle will produce the highest notes. 3 The hole closest to the blowhole will produce the highest note. 4 The hole furthest from the blowhole will produce the highest note. Q: 13 How does the speed of radio waves compare to the speed of visible light waves? 1 Radio waves are much slower than visible light waves. 2 Radio waves are much faster than visible light waves. 3 Both radio waves and visible light waves travel at the same speed. 4 Radio waves are either slower or faster than visible light waves depending on its frequency. Q: 14 Which of the following correctly shows the arrangement of the radiations in the electromagnetic spectrum in the decreasing order of wavelength? 1 X-rays, infrared radiations, microwaves and radio waves 2 X-rays, microwaves, infrared radiations and radio waves 3 radio waves, infrared radiations, microwaves and X-rays 4 radio waves, microwaves, infrared radiations and X-rays 5  Physics CLASS 10 SET NO 3 Q: 15 - I am a type of wave and can be used to kill harmful bacteria. - I can cause skin cancer. - I help your body to produce Vitamin D. Who am I? 1 Gamma 2 X-ray 3 Visible light 4 Ultraviolet Q: 16 Which of the following statements correctly explains why quartz prism is used instead of glass prism to produce UV spectrum? 1 because quartz prism reflects all the UV radiations falling on it 2 because quartz atoms does not interact with UV radiations 3 because quartz is transparent to UV radiations 4 because quartz is opaque to UV radiations. Q: 17 Which of the following is true about all electromagnetic waves? 1 They cause fluorescence. 2 They are longitudinal waves. 3 They exhibit properties of reflection and refraction. 4 They require a material medium for their propagation. Q: 18 A beam of light consisting of three rays - P, Q, R is incident on a transparent plastic block from air as shown in the figure below. Which of the following statements is true? 1 Refractive index for P is greater than that for Q. 2 Refractive index for P is greater than that for R. 3 Refractive index for R is greater than that for Q. 4 Refractive index for P, Q and R is the same. 6  Physics CLASS 10 SET NO 3 Q: 19 In the diagram below. Di denotes the angle of deviation of the prism. The angle of deviation of the prism depends on __________________. P) Frequency of incident light Q) Angle of incidence R) Material of the prism S) Size of the prism 1 only P 2 only P and Q 3 only P, Q and R 4 all - P, Q, R and S Q: 20 A hunter sees a fish which is swimming in clear water as shown in the figure. To hit the fish, he should take aim adjusting for the fish's motion and __________________. 1 exactly at the depth where the fish appears to be 2 a little below where the fish appears to be 3 a little above where the fish appears to be 4 at the fish's eye, exactly where it appears to be 7  Physics CLASS 10 SET NO 3 Q: 21 We see light only when it is reflected or scattered from something. As light travels through the earth's atmosphere, it bumps into gas molecules. These molecules spread the blue part of the sunlight in different directions. It gets scattered all around the SKY. Whichever direction you look in, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the SKY looks blue. What would the SKY look like on a planet without any atmosphere? 1 It would look white because sunlight is white. 2 It would look like a rainbow because sunlight will split into its components. 3 It would look like the night sky because there would be no light being scattered. 4 It would look the same - the scattering will anyway occur because of the planet's gravity. Q: 22 Two statements are given below. One is labelled Assertion (A) and the other is labelled Reason (R). Read the statements carefully and choose the option that correctly describes statements A and R. Assertion(A): The extent of deflection in a magnetic compass placed at a certain distance from a current-carrying straight conductor changes as the compass is brought closer to the conductor. Reason (R): The strength of the magnetic field around a current-carrying straight conductor increases with an increase in distance from the conductor. 1 Both assertion and reason are true and reason is the correct explanation for assertion. 2 Both assertion and reason are true but reason is NOT the correct explanation for assertion. 3 Assertion is true but the reason is false. 4 Assertion is false but reason is true. 8  Physics CLASS 10 SET NO 3 Q: 23 Four friends were discussing neutral points in a magnetic field of a magnet. Here is what they said. Hari: At the neutral points the magnitude of the magnetic field of a magnet is equal to the Earth's horizontal magnetic field in the opposite direction. Uzma: At the neutral points the magnitude of the magnetic field of a magnet is equal to the Earth's vertical magnetic field in the opposite direction. James: Net magnetic field at the neutral points of a magnet is maximum. Seeta: Net magnetic field at the neutral points of a magnet is zero. Who is/are correct? 1 only Uzma and James 2 only Hari and James 3 only Uzma and Seeta 4 only Hari and Seeta Q: 24 Shown here is a coil of insulated copper wire wrapped loosely around a tube 'X'. The wire is connected to a battery and a switch as shown. When the switch is closed, the compass needle deflects. Based on this, which of the following materials could tube 'X' be made of? 1 only iron 2 only copper 3 only iron or copper 4 (it could be made up of any material) Q: 25 Four conductors, kept very close and parallel to one another, each carries 0.5 A of current all in the same direction. Each of them is connected to different cells. The magnetic field set up by all of them together ______________________. 1 will cancel one another resulting in zero field 2 will be the equivalent to the magnetic field set up by each one of them 3 will be 4 times as strong as the magnetic field set up by each one of them 4 (No statement can be made as they all belong to different circuits.) 9  Physics CLASS 10 SET NO 3 Q: 26 In houses many electrical appliances can function together at the same time without any reduction in voltage. Why? 1 because electrical connections are in parallel 2 because electrical connections are in series 3 because very high voltage electricity is supplied 4 because voltage increases when appliances work together. Q: 27 Shobha was ironing clothes with an electric iron connected to the mains socket with a three-pin plug. What is the function of the biggest pin in the plug? 1 It brings in the current from the mains. 2 It fixes the plug more firmly in the socket. 3 It prevents shocks by connecting to the Earth. 4 It completes the circuit by carrying away the current. Q: 28 Shown below is a kWh meter. What is it used for? 1 to reduce the consumption of energy 2 to record the electricity consumed 3 to prevent short circuits and electric fires 4 to convert the circuit systems from series to parallel and vice-versa Q: 29 Which of the following is most likely to burn up the fuse? 1 touching the electric switch with wet hands 2 using two-pin plugs instead of three-pin plugs 3 using switches that have miniature circuit breakers 4 connecting many electrical appliances simultaneously 10  Physics CLASS 10 SET NO 3 Q: 30 Anagh was riding on a skateboard at constant velocity along a track 1 m above the ground. He goes down a curved slope and then reaches a maximum height of 6 m on the opposite slope. What was Anagh's initial velocity? (Take g as 10 m/s 2 ) 1 3 m/s 2 5 m/s 3 7 m/s 4 10 m/s Q: 31 Car 1 has twice the mass of car 2, but they both have the same kinetic energy. How do their speeds compare (assume velocity of car 1 is v 1 and that of car 2 is v 2 )? 1 2 v1 = v2 2 √2 v 1 = v 2 3 4 v1 = v2 4 v1 = v2 Q: 32 Ram and Shyam each of weight 300 N start climbing the same hill at the same time. The path covered by them is shown below. If both of them take the same time to reach the hilltop, which of them has used more power against gravity? 1 Ram, as he does less work. 2 Shyam, as he does more work. 3 Ram and Shyam have used the same power as they do the same amount of work. 4 (Given data is not sufficient to answer the question.) Q: 33 A man holding a parcel weighing 20 N walks a distance of 10 metres on flat ground at a constant speed. What is the work done on the parcel by gravitational force? 1 0J 2 200 J 3 >200 J 4 Not clear from data provided 11  Physics CLASS 10 SET NO 3 Q: 34 Which of these establishments is likely to generate nuclear waste? P) thermal power plant Q) research laboratories R) schools S) hospitals 1 only P and Q 2 only Q and S 3 only P, Q and S 4 all - P, Q, R and S Q: 35 Four friends were talking about the effects of radiations on human body. Here is what they said. Jamie: Short term exposure to X-rays has no effect on the unborn child. Devi: Gamma radiations affect only the dead or the cancerous cells. Diana: Radiations arising from neutrons can also cause harmful biological changes. Hari: Beta radiations can permanently alter the DNA and RNA sequence in our body. Who is correct? 1 Jamie 2 Diana 3 Devi 4 Hari Q: 36 A radioactive element X undergoes decay by emitting a gamma particle. Which of the following is the correct representation of the daughter nucleus? Note: A = mass no., Z = atomic no, 1 2 3 4 12  Physics CLASS 10 SET NO 3 Q: 37 Ravi sees this question in his Physics textbook: To answer the above question, which of these need to be known? 1 Specific heat capacity of water and specific latent heat of vaporisation. 2 Specific heat capacity of water, density of water and volume of water. 3 Specific latent heat of vaporisation and volume of water. 4 None are needed as heat needed to cause change of state is zero. Q: 38 Substance P has a higher specific heat capacity when compared to substance Q. When equal quantities of both the substances are heated for the same time under the same conditions, which substance will show a greater increase in temperature? 1 substance P 2 substance Q 3 Both will show an equal increase in temperature. 4 (Cannot say from the information given.) Q: 39 The specific heat capacity of water is 4.2 J/ (g °C). If the heat capacity of X g of water in J/° C is 294 J/°C. What is X? 1 70 2 100 3 290 4 298 Q: 40 Sneha placed a beaker containing 200 g of hot water at 80°C in a vessel containing 1000 g of cold water at 30°C. By applying the principle of calorimetry (heat lost by one body = heat gained by another body), she expected the temperature of the water to be 38.6 °C on equalization of temperature. The actual temperature that she observed on equalization was 33 °C. Which of the following is a possible explanation for the lower temperature that Sneha obtained? 1 The principle of calorimetry does not apply when the hot and cold substances are of the same material. 2 The principle of calorimetry is true only when equal quantities of hot and cold substances are used. 3 Some of the heat will be lost to the surroundings as the set up is not sufficiently insulated. 4 Some of the heat transferred to the water will not result in a change in its temperature. 13  Physics CLASS 10 SET NO 3 Q: 41 If equal amount of energy is supplied to 2 pieces of ice, each weighing 1 kg, kept at 250 K and 273 K, which of them will rise in temperature by 1 K faster? 1 the piece at 250 K 2 the piece at 273 K 3 (Both will rise equally fast.) 4 (Cannot say unless the amount of energy supplied is known.) Read the given text and answer the questions that follow. Shashank went to the optician to get his eyes checked. He observed that the doctor combined two lenses and put these in front of his eyes so that he could see clearly. The powers of the two lenses used in the combination were -3D and 4D. Q: 42 What type of lens will the combination of lenses be? 1 diverging lens 2 converging lens 3 both converging and diverging since both types of lenses are used 4 either converging or diverging depending on the defect in Shashank's eyes Q: 43 Which of these will be the focal length of the lenses Shashank has to wear? 1 -14 cm 2 +25 cm 3 -33 cm 4 +100 cm Q: 44 The object is placed close to the lens in front of the focus. Which of the following would we expect the image to be? (i) real rather than virtual (ii) inverted rather than upright (iii) enlarged rather than reduced 1 only (i) and (ii) 2 only (i) and (iii) 3 only (iii) 4 none of them 14  Physics CLASS 10 SET NO 3 Q: 45 Two statements are given - one labelled Assertion (A) and the other labelled Reason (R). Read the statements carefully and choose the option that correctly describes statements A and R. Assertion (A): The shorter the focal length of a convex lens, the higher is its power. Reason (R): A convex lens of longer focal length causes a greater degree of convergence of light rays. 1 Both A and R are true and R is the correct explanation for A. 2 Both A and R are true but R is not the correct explanation for A. 3 A is true but R is false. 4 A is false but R is true. Q: 46 In which of the following cases is the moment of force the maximum when force is applied on a door? 1 a point near the hinges and perpendicular to the door 2 a point near the hinges and parallel to the door 3 a point far away from the hinges and parallel to the door 4 a point far away from the hinges and perpendicular to the door Q: 47 Shown below is a pendulum clock. What are the different types of motion that you would observe in such a clock? 1 rectilinear motion and circular motion 2 circular motion and oscillatory motion 3 oscillatory motion and rectilinear motion 4 rectilinear, oscillatory and circular motion 15  Physics CLASS 10 SET NO 3 Q: 48 Karthik and his friends are playing on the merry-go-round. Which of the following rows correctly describes the nature of the centripetal and centrifugal force experienced by them. Centripetal Centrifugal P real, away the centre fictitious, towards from the centre Q real, towards the centre fictitious, away from the centre R fictitious, towards from the centre real, away the centre S fictitious, away from the centre real, towards the centre 1 P 2 Q 3 R 4 S Q: 49 Uzma balanced a mop on top of a wooden wedge at point G as shown in the figure. She cut the mop at G into 2 parts and then weighed each part separately. Which of the following statements is likely to be true? 1 The part of the mop with the brush will weigh more than the part of the mop without the brush. 2 The part of the mop with the brush will weigh less than the part of the mop without the brush. 3 Both parts of the mop will weight equally. 4 (Nothing can be said without knowing the initial mass of the mop.) 16  Physics CLASS 10 SET NO 3 Q: 50 An object's centre of gravity is a point at or near the object through which its entire weight can be assumed to pass. An object is stable if a vertical line drawn from its centre of gravity (CG) passes through its base. Sneha places a wooden toy in three different positions in her cupboard as shown below. In which of the three positions is the toy like to tip over? 1 only P 2 only R 3 only Q and R 4 all - P, Q and R End of Questions in Paper 17 This page has no questions and is left blank intentionally. 18 This page has no questions and is left blank intentionally. 19 This page has no questions and is left blank intentionally. 20