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ICSE Class X Sample / Model Paper 2025 : Physics

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General Instructions: Answer to this Paper must be written on the paper provided separately. You will not be allowed to write during 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 allowed for writing the answers. Section A is 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 Multiple Choice Questions : (i) [15] The moon revolving around the earth is in __________ equilibrium. (a) Static (b) Dynamic (c) Unstable (d) None (ii) The rule by which the polarity at the end of solenoid are determined : (a) Lenz law (b) Fleming left hand rule (c) Fleming right hand rule (d) Right hand thumb rule (iii) In the following diagram the sequence of earth live and neutral wire is R1 R2 1 Mains 2 3 Connection ~ (a) 1, 2, 3 (iv) (b) 3, 2, 1 (c) 2, 1, 3 (d) 1, 3, 2 Equivalent resistance in the circuit given below (Between A and B) C 6 6 A (a) 6 (b) 12 B 3 (c) 12 5 (d) 5 12 Page 1 of 6 (v) The V-I graph far two wires of same material is shown below if wire A is thinner than wire B then : V A B (a) A B (b) A I (c) B A (d) B A B (vi) Which of the following nuclear radiations can be stopped by a sheet of paper (a) radiation (b) radiation (c) radiation (d) None (vii) Assertion (A) : The product of resistivity and conductivity of a conductor is 1. Reason (R) : Because each of the resistivity and conductivity depends on the material of conductor. (a) Both assertion and reason are true, reason is the correct explanation of assertion. (b) Both assertion and reason are true, but reason is not the correct explanation of assertion. (c) Assertion is true but reason is false (d) Assertion is false but reason is true (viii) The value of 1 m :1nm is (a) 1 : 103 (b) 103 : 1 (c) 1 : 10 (d) 10 : 1 (ix) The amplitude of sound wave is increased from 1mm to 4mm. The loudness of the sound will (a) increase to 2 times (b) increase to 4 times (c) increase to 16 times (d) Decreases to 16 times (x) For which colour a convex lens will have smallest focal length. (a) Red (b) Green (c) Violet (xi) (d) Yellow A piece of wire is cut into 10 parts equally, each part of wire has resistance R ratio of resistance of the wire when they are connected in series and parallel (RS : RP) (a) 1 : 100 (xii) (b) 100 : 1 (c) 1 : 1 (d) 10 : 100 A block of aluminium of mass m is heated and its raise in temperature is T . The amount of energy gained by aluminium is E. Which one correctly represent specific heat capacity of aluminium. (a) (xiii) m Q T (b) m E T (c) m T (d) E m T From the displacement-time graph of a wave travelling is a string with velocity 10ms-1.What will be the frequency of the wave. y(m) 0.2s 0.1s (a) 10 Hz (b) 0.5 Hz 0.3s 0.4 s (c) 5 Hz t(sec) (d) None Page 2 of 6 (xiv) (xv) Device that work on the heating effect of current is : (a) Switch (b) Fuse (c) Plug (d) Socket An object is placed in front of convex lens mentioned in figure position of image is : B 2F1 A F1 (a) b/w F2 and 2F2 (c) Between F1 and 2F1 C F2 2F2 (b) Between C and F2 (d) Behind 2F2 Question 2 (i) Why do the farmers fill the fields with water on a cold winter night ? [2] (ii) Draw a diagram to showing the direction of magnetic field lines due to straight current carrying wire. Also show the current in the wire if we change the direction of current then what will happen to the direction of magnetic field. [2] (iii) Define the term kilowatt-hour and state its value in S.I. unit [2] (iv) An electric bulb is rated 100W 250W. What information does this convey ? [2] (v) How does the deviation produced by a triangular prism depend on the colours (or wavelengths) of light incident on it ? [2] (vi) What do you understand by simple machine. [2] (vii) What is the purpose of a jack in lifting a car by it. [2] Question 3 (i) [2] (ii) Classify the following amongst contact and non-contact forces. (a) Frictional force (b) Normal reaction force (c) Force of tension in the string (d) Gravitational force A body is acted upon by a force. State two condition when the work done is zero. (iii) State two factors on which speed of sound wave depends. [2] (iv) Calculate the frequency of yellow light of wavelength 550nm. The speed of light is 3 108 m/s. [2] (v) The following diagram shows an object AB and a converging lens L with foci F1 and F2 [2] L B F1 A (a) (b) F2 Draw two rays from the object and complete the diagram to locate the position of the image. Mark the image CD. Clearly mark the eye position from where the image is viewed. State three characteristics of the image. [2] Page 3 of 6 SECTION-B (Attempt any four Questions) Question 4 (i) Fig shows a uniform meter scale of weight W supported on a fulcrum at the 60 cm mark by applying the effort E at 90 cm mark. [3] (a) State the reason weather the weight W of the scale is greater than, less than or equal to the effort E. (b) Find the mechanical advantage in an ideal case. 0 50 90 100 cm 60cm F (ii) E Fig. Show a radioactive source S in a thick lead walled container having a narrow opening. The radiations pass through an electric field between the plates A and B [4] + A B S (a) (b) (c) (d) (iii) Complete the diagram to show the paths of , and radiation. Name the radiation which is unaffected by the electrostatic field. Why is the source S kept in a thick lead walled container with a narrow opening ? Which radiation is deflected the most. Give reason. What is the principle of method of mixture (or principle of Calorimetry) ? Name the law on which this principle is based. [3] Question 5 (i) How is the working of an electric bell affected. If alternating current be used instead of direct current ? (ii) Radioactivity is a nuclear phenomenon : Comment on this statement (iii) (a) (b) Question 6 (i) (a) (b) (ii) [3] [3] Calculate the current through of 60 W lamp rated for 250 V. If the line voltage falls to 200 V how is the power consumed by the bulb affected. Distinguish between Kilowatt and Kilowatt-hour. [4] A scooter mechanic can open a nut by applying 120 N force while using a lever of 50 cm in length. How long handle is required if the wishes to open it by applying a force of only 40 N ? A porter lifts a luggage of 15 kg from the ground and puts it on his head 1.5 m above the ground. Calculate the work done by him on the luggage (Take : g = 10ms-2) [4] Fig. Show a thin beam of white light from a source S . Striking on one face of prism. white light S Prism Screen Page 4 of 6 (a) (c) Complete the ray diagram to show effect of prism on the beam and to show what is seen on the screen. A slit is placed in b/w the prism and the screen to pass only the light of green colour what will you then observe on the screen. What conclusion you draw from the observation in part (b) [3] (a) (b) What are non-ohmic resistors ? Give one example and draw its V- I graph. Define the term resistivity and state its S.I. units. [3] In an experiment of verification of ohm s law following observations are obtained. [3] (b) (iii) Question 7 (i) Potential difference (V) 0.5 1.0 1.5 2.0 2.5 Current (I) 0.2 0.4 0.6 0.8 1.0 Draw V-I graph and use this graph to find (a) Potential difference V when current I is 0.5 A (b) Current I when P.d. V is 0.75 V (c) Resistance of circuit (ii) (iii) (a) (b) On sending an ultrasonic wave from a ship towards the bottom of a sea, the time interval b/w sending the wave and receiving it back is found to be 1.5 s. If the velocity of wave in sea water 1400 m/s, find the depth of the sea Explain pitch with the help of diagram. [3] (a) (b) Explain electromagnetic Induction? Describe one experiment to demonstrate the phenomenon of electromagnetic Induction. [4] Question 8 (i) (a) (b) 1300 J of heat energy is supplied to raise the temperature of 0.5 kg of lead from 20 C to 40 C. Calculate the specific heat capacity of lead Define specific heat capacity and latent heat [3] (ii) An electric toaster draws 8A current in a 220 V circuit. It is used for 2h. Find the cost of operating the toaster if the cost of electrical energy is Rs 4.50 per kWh [3] (iii) (a) (b) How does refractive index of medium changed (i) Due to change in wavelength of light (ii) Due to change in medium (iii) Due to change in temperature of medium Define dispersion of white light. [3] Question 9 (i) A cricket ball of mass 100g strikes the hand of a player with a velocity of 20 ms -1 and is brought to rest in 0.01 sec. Calculate : [3] (a) Force applied on the hand by the ball (b) Acceleration of the ball (ii) In each of the following case, where must an object be placed in front of a convex lens so that the image formed is [4] (a) at infinity (b) of same size as the object Page 5 of 6 (c) (d) (iii) inverted and enlarged Upright and enlarged A 4m long rod of a negligible weight is to be balanced about a point 125 cm from one end. A load of 18 kgf is suspended at a point 60 cm from the support on the shorter arm. [3] (a) a weight W is placed 250 cm from the support on the longer arm find W. (b) if W = 5kgf, where must it be kept to balance the rod. (c) To which class of lever does it belong ? Page 6 of 6

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