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ICSE Class X Mid-term 2026 : Physics : TERM-II EXAMINATION

5 pages, 124 questions, 2 questions with responses, 2 total responses,

G V RAO Physics
St. Patrick's Academy, Bangalore

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ST. PATRICK S ACADEMY, BENGALURU TERM-II EXAMINATION- 2025-26 SUBJECT: PHYSICS Class: X Max.Marks:80 Date:13/10/2025 Duration: 2 h (Answer all the questions) SECTION- A Question 1 In questions (i) to (xv) below, choose the correct alternative (a), (b), (c) or (d) for each of the questions given below i. ii. iii. The SI unit of power of lens is a) watt b) joule c) dioptre d) kilo-watt hour The radiations having the least penetrating power is a) X rays b) Gamma rays c) radiations d) radiations iv. The major energy transformation taking place during Photosynthesis in green leaves is a) light energy to chemical energy b) Electrical energy to chemical energy c) Light energy to food energy d) Light energy to heat energy A steering wheel of diameter 0.3 m is rotated clockwise by applying a pair of forces each of 12N. The resultant moment of couple would be a) 36 Nm b) 18 Nm c) 3.6 Nm d) 1.8 Nm v. The diagrams below show a force F = 40 N acting on a rod AB pivoted at A in different directions. Identify the correct statement. a) P and S have opposite moments. b) The magnitude of the moment of force is maximum in R. c) The magnitude of the moment of force is maximum in P and Q. Page 1 of 5 vi. vii. viii. ix. x. xi. d) The moment of force in R is negative. Sumit, a teenager, enjoys playing his music loudly. However, his grandmother consistently lowers the volume of the music player. Analyse the wave to identify which characteristic of the wave has been altered when the grandmother reduces the volume. a) The length OD becomes more. b) The length BF becomes less. c) The length ED becomes less. d) The length AB becomes less. An object of height 4cm is placed in front of a concave lens at a distance of 16cm of focal length 10cm. The characteristics of image are: a) virtual, enlarged and inverted b) virtual, diminished and inverted c) virtual, diminished, and erect d) virtual, enlarged, and erect. Blue and green light enters from air to glass with same angle of incidence, then the angle of refraction of a) blue light will be greater than green light b) both colors will be same c) green light will be greater than blue light d) both colors will be greater than the angle of incidence Assertion: Thicker the glass slab more is the lateral displacement Reason: Lateral displacement is inversely proportional to thickness of glass slab a) Both assertion and reason are true b) Both assertion and reason are false c) Assertion is false but reason is true d) Assertion is true but reason is false If three resistors 1, 2 and 3 are connected in series and by R1 R2 R3, then what is the relation between the currents 1, 2and 3 respectively flowing through them? a) I1 = 12 = I3 b) I1 < I2 < I3 c) I1 I2 I3 d) 1/ 1< 1/ 2< 1/ 3 A man stands at four different positions A, B, C and D in front of a reflecting surface and is practicing the instructions for the march past. Time taken by sound to reach the reflector from the position A, B, C and D are 0.23 s, 0.21 s, 0.023 s and 0.01s respectively. At which positions is the man likely to hear echo of his voice? a) A and B only b) B and C only c) C and D only Page 2 of 5 d) B and D only xii. xiii. xiv. xv. Energy conversion when an oscillating pendulum moves from mean position to its extreme position is . a) Kinetic energy to heat energy b) Potential energy to kinetic energy c) Kinetic energy to gravitational potential energy d) Potential energy to vibrational kinetic energy In an equiangular prism if angle of incidence is 450 and angle of emergence is 550.The angle of deviation of ray of light is a) 450 b) 400 c) 350 d) 500 When the circuit is closed a) terminal voltage is equal to electromotive force b) terminal voltage is greater than electromotive force c) terminal voltage is less than electromotive force d) none of the above An object is placed at a distance of 24cm from a convex lens having focal length 10cm when an image is obtained on the other side of the lens. The distance of the screen from the lens is a) 17.14cm b) 16.5cm c) 25.6cm d) 30.8cm Question 2 a) Show the refraction of a light ray passing through the thick transparent glass block. Mark the angle of incidence, angle of emergence and lateral displacement in the figure [3] 0 0 b) 10 g of hot water at 60 C is added to cold water at 20 C such that resultant temperature of mixture is 40 0C. Find the mass of cold water used. [2] c) A rectangular metal sheet is suspended from one of its corners to find its centre of gravity. While taking observations, a student marks points A, B, C and D as centre of gravity. [2] i. ii. Which observation/observations do you think is/are correct? Name the factors on which the centre of gravity of a body depends. Page 3 of 5 d) A convex lens of power +5 D has an object placed at a distance of 50 cm in front of the lens. [2] i. ii. State the nature of the image formed. What is the definite distance, towards or away from the lens, the object should move so that the image is not seen? e) White light is falling on a prism. On which surface of the prism, there is [2] i. deviation only ii. both deviation as well as dispersion f) A light wave passes from one medium to another medium. Mention one property of the wave which [2] i. changes ii. does not change g) A high resistance voltmeter measures the potential difference across a battery to be 9 V. On connecting a 24 resistance across the terminals of the battery, the voltmeter reads 7.2 V. Calculate the internal resistance of the battery. [2] Question 3 a) A body is acted upon by two forces each of magnitude F, but in opposite directions. State the effect of the forces if both forces act at the same point of the body. Find [2] i. resultant force acting on the body ii. moment of force acting on the body b) A cannon ball of mass 500g is fired with a speed of 15ms-1. Find its: [2] i. kinetic energy ii. momentum c) State principle of reversibility. Also write it in mathematical form. [2] d) A tungsten wire has resistance of 10 . Find the resistance of another tungsten wire whose length is thrice the first wire and is 4 times thicker than the first. [2] e) With the help of a diagram show the path of a ray of monochromatic light which undergoes minimum deviation through an equilateral prism. (label all the required angles) [2] SECTION-B (Answer all questions) Question 4 a) i. Show by means of a ray diagram the formation of image formed when a coin is dropped inside a beaker containing water. [2] ii. State the physical significance of critical angle. [1] iii. Write the relation between the refractive index and critical angle of incidence [1] b) 100 g of hot water at 60 0C is added to cold water at 20 0C contained in a copper calorimeter of mass 200 g such that resultant temperature of mixture is 40 0C. Find the mass of cold water contained in copper calorimeter. [ Given SHC of Cu= 400 J Kg -1 K -1 and SHC of water = 4200 J Kg -1 K -1] [3] c) Different sounds are heard when a bucket is placed below a tap of water. [3] i. Explain why does this occur. ii. Name the phenomenon taking place when loudest sound is heard iii. Define the phenomenon taking place in [ii]. Page 4 of 5 Question 5 a) A uniform metre scale of weight 50 gf is balanced at 60 cm mark when weight of 25 gf is suspended at 10 cm mark. Where should the weight of 100 gf be suspended for the metre scale to be in rotational equilibrium. [3] b) An electric pump is 60% efficient and is rated 2 H.P. Calculate the maximum amount of water it can lift through height of 5m in 40s. [ g = 10ms-2 and 1 H.P = 750 W] [2] c) i. Define power [1] ii. What is the effect on power spend by a person if time for doing the work is reduced to half while lifting the same load through the same height? [2] d) Name the factors that affects the i. Internal resistance ii. Loudness [2] Question 6 a) i. ii. iii. Write the SI units of specific resistance of a conductor. [1] How the temperature affects the internal resistance of a cell. [1] A wire of resistance 27 is tripled on itself. What is the value of its new resistance. [1] b) An electric toaster rated 3000 W 250V is run on an average of 3hr/ day. Calculate the cost of electricity consumed by the electric toaster per week if rate of electricity is Rs. 3 per kWh. [2] c) Three resistors each of 5 are connected in the form of an isosceles right angled triangle ABC. Find the effective resistance across its hypotenuse AC. [2] d) Three resistances of 2 , 3 and 5 are to be connected in such a way that effective resistance is more than 5 and less than 7 . Draw the combination and find the effective resistance. [3] Question 7 a) A man stands between 2 vertical cliffs hears the first echo after 2 second and the next echo after 4 second. Find the distance of the person from the nearest cliff and distance between the two cliffs. [velocity of sound in air is 340ms-1] [3] b) Radioactive element AXZ loses two successive particles and an particle such that the resulting nuclide is PYQ. Calculate the values of P and Q. [2] c) i. Write any two medical uses of isotopes [1] ii. State any two ways of handling radioactive waste. [1] d) Show by means of a diagram the deflection of alpha, beta and gamma radiations in a magnetic field when it acts outwards [outside the plane of paper] [3] This paper ends here Page 5 of 5

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