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

ICSE Class X Mid-term 2025 : Physics

7 pages, 93 questions, 0 questions with responses, 0 total responses,

Dr.Vijayalakshmi Murali
Pearl Drop School, Pune

+Fave Message

Profile Timeline Uploads

Home > ammavm >

Formatting page ...

PEARL DROP SCHOOL ICSE Mid Term Examination 2024 SUBJECT: PHYSICS CLASS-X Total Marks: 80 Date: 23rd October 2024 Time: Two hours Maximum Marks: 80 Time allowed: Two hours Answers 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 (40 Marks) (Attempt all questions from this Section.) Question 1 Choose the correct answers to the questions from the given options [15] (Do not copy the question, write the correct answers only) (i) (ii) The real depth in a liquid is 7.2 cm and the refractive index is 4/3, then the apparent depth in the liquid is: a) 9.6 cm b) 10 cm c) 8 cm d) 5.4 cm In an atom, when an electron moves around the nucleus in a circular path, the centripetal force is a) Electrostatic force of attraction by the electron on the nucleus b) Electrostatic force of attraction by the nucleus on the electron c) Electrostatic force of attraction by the electron on the proton d) Electrostatic force of attraction by the nucleus on the proton (iii) (iv) (v) A rope is being pulled from both ends. Each man and woman pull the rope with 30 Newtons and 20 Newtons force respectively. If there are 4 men and 3 women pulling the rope from one end then find how many men and women will be there on the other end when the tension in the rope is zero? a) 2 Men and 6 Women b) 2 Men and 3 Women c) 3 Men and 1 Woman d) 2 Men 3 Women The energy conversion in a washing machine is from a) magnetic to electrical b) electrical to mechanical c) electrical to magnetic d) magnetic to mechanical The graph shows I against V relation for three conductors A, B and C. Choose the correct relation for resistors of A, B and C. a) RA > RB > RC b) RB > RC < RA c) RC > RB < RA d) RC > RB > RA (vi) The safe limit of level of sound is given by, a) 10 to 30 dB b) 0 to 80 dB c) 10 to 120 dB d) 0 to 120 dB (vii) The specific heat capacity of a moving body of 400 g mass, which required 3000 J of heat to raise its temperature from 300C to 450C is: a) 500 JKg-1K-1 b) 0.333 JKg-1K-1 c) 200 JKg-1K-1 d) 100 JKg-1K-1 (viii) An optical fibre is used to transmit light signal over a long distance without loss of energy. The phenomenon of light that governs the functioning of the optical fibre is: a) refraction b) reflection c) scattering d) total internal reflection (ix) When seven spectral colours pass through a glass block from air, then which of the following statements is correct: a) In the glass block, speed of blue light > speed of yellow light b) In the glass block, speed of green light > speed of orange light c) In the glass block, speed of violet light > speed of red light d) In the glass block, speed of orange light > speed of indigo light (x) When a current I flows through a wire of resistance R for time t then the electrical energy produced is given by: a) I2Rt b) IR2t c) IRt d) IRt2 (xi) To detect obstacles and their enemy dolphins use a) infrasonic waves b) ultrasonic waves c) electromagnetic waves d) radio waves (xii) The radiation emitted by mercury vapour lamp is: a) Gamma rays b) Micro waves c) Radio waves d) Ultraviolet rays (xiii) The energy of an electron is 4.0x10-19 J. Then the energy expressed in eV is: a) 0.4 eV b) 2.5 eV c) 4.8 eV d) 2 eV (xiv) The graph given below shows heat energy supplied against change in temperature when no energy is lost to the surrounding. The slope of this graph will a) b) c) d) Specific heat capacity Latent heat of fusion Latent heat of vaporization Heat capacity (xv) The following figure shows the heating curve of a substance. The melting point of the substance is: a) b) c) d) 2000C 1000C Less than 1000C More than 2000C Question 2 (i) (ii) (iii) Complete the following by choosing the correct answer from the backet [6] a) The moon revolving round the earth is in ______ equilibrium [Static/ Dynamic/ Translational] b) _____ radiations are used in producing vitamin D in food of plants and animals. [infrared /ultraviolet /microwaves] c) Fuse wire is made of an alloy of lead and tin because its ___ is low and ___ is more than copper or aluminium. [specific resistance/ melting point/ density]. d) Critical angle of a medium _____ with the increase in temperature. [increases/decreases/remains same] e) The specific resistance remains practically unchanged for ______. [silver/ manganin/ tungsten] Calculate the effective resistance across AB: [2] (a) If the lens is placed in water instead of air, how does its focal length change? (b) Which lens, thick or thin has greater focal length? [2] Question 3 (i) (ii) (iii) (a) Why is the motion of a body moving with a constant speed around a circular path said to be accelerated? (b) Name the unit of physical quantity obtained by the formula 2K/V2, Where K: kinetic energy, V: Linear Velocity. [2] The bells of a temple are big in size. Why? [2] A ray of light is incident on a glass surface at an angle of 45 with the corresponding angle of refraction as 30 . Find the value of the refractive index of glass and also stating the law. [2] (iv) (v) (vi) (vii) State the principal of calorimetry. A solid of mass 60 g at 1000 C is placed in 150 g of water at 200C. The final steady temperature is 250C. Calculate the heat capacity of solid. [sp. heat capacity of water is 4.2Jg-1K-1] [2] If speed of sound is 330ms-1 then find the audible range of wavelength? [2] Why does stone lying in the sun get heated up much more than water lying for the duration of time, explain. [2] When a potential difference of 2 volts is applied across the ends of a wire of 5 m length, a current of 0.5A flows through it. Calculate: [3] (a) the resistance per unit length of wire, (b) the resistance of 2 m length of wire and (c) the resistance across the ends of wire if it is doubled on itself. SECTION B (40 Marks) (Attempt any four questions) Question 4 (i) (ii) The refractive index of water is 1.33 at a certain temperature. When the temperature is of water is increased by 400C, the refractive index changes to x. (a) State whether x<1.33 or x>1.33 (b) Mention any two differences between total internal reflection of light from a prism and reflection of light from a plane mirror. [3] Study the diagram given below. (a) Name the lens LL'. (b) What are the points O and O' called? (c) Complete the diagram to form the image of the object AB. (d) State the three characteristics of the image. [4] A wave of wavelength 50 . (a) Name the wave, (b) State its speed in vacuum and (c) State two of its uses. [3] Question 5 (i) (ii) An object is placed at a distance of 12 cm from a convex lens of focal length 8 cm. Find: (a) the position of the image (b) nature of the image. [3] The adjoining diagram shows a ray of white light AO incident on a rectangular glass block, which is silvered at one surface. This ray is partly reflected and partly refracted. (a) Copy the diagram and trace the path of refracted and reflected. Show at least two rays emerging from the surface PQ. (b) How many images are formed from the above case? Which image is the brightest? [4] (iii) The diagram below shows a glass prism of a critical angle 420. (a) Redraw the diagram and complete the path of the light ray PQ till it emerges out of the prism. (b) Also, calculate the net angle of deviation of the ray PQ when it emerges from the prism. [3] Question 6 (i) (ii) (iii) A pump is used to lift 300 kg of water from a depth of 75 m in 10s. Calculate (a) the work done by the pump (b) the power at which the pump works and (c) the power rating of the pump if its efficiency is 40% (take g=10ms-2). [3] A coconut of mass 450 g falls from the top of an 80 m high tree. (a) Calculate the potential energy possessed by the coconut when it is at the top of the tree, (b) without calculation, state the kinetic energy with which it strikes the ground and state the principal involved to arrive at the answer in (a), and (c) what will the kinetic energy of the body at height of 20m from the ground? [take g=10 ms-2] [4] Define the term centre of gravity and state the factors on which the centre of gravity of a body depends. What is the position of the centre of gravity of a lamina in the shape of a parallelogram? [3] Question 7 (i) A boy tunes in to a radio channel to a radio station 93.5 MHz. (a) Name the scientific wave phenomenon involved in tuning the radio channel (b) Now, what is the frequency of the channel and convert this frequency in S.I. unit and (c) Name the important characteristic of sound that is affected during this phenomenon. [4] (ii) (iii) A person standing between two vertical cliffs produces a sound. Two successive echoes are heard at 4s and 6s. Calculate the distance between two cliffs. [speed of sound is 320ms-1]. [3] (a) How does a stretched string on being set into vibrations, produce sound. (b) Will the sound be audible if the string is set into vibration on the surface of the moon? Give reasons. [3] Question 8 (i) (ii) Define the term conductivity, its S.I. unit. What is super conductor and give an example. [3] A cell of Emf 2 v and internal resistance 1.2 is connected with an ammeter of resistance 0.8 and two resistors of 4.5 and 9 as shown in the diagram below. (iii) (a) What would be the reading on the ammeter? (b) What is the potential difference across the terminals of the cell? [4] What property of water makes it an effective coolant? Why in cold countries water is used as heat reservoir for wine and juice bottles to avoid them from freezing? [3] Question 9 (i) (ii) (iii) (a) Define the term specific heat capacity and state its S.I. unit. How is the heat capacity of a body related to the specific heat capacity of its substance? (b) A piece of iron of mass 2.0 kg has a heat capacity of 966 J K -1. Find heat energy needed to warm it by 150C. [4] 40 g of ice at 0 C is used to bring down the temperature of a certain mass of water at 60 C to 10 C. Find the mass of water used. [Specific heat capacity of water = 4200 J kg 1 C 1 and Specific latent heat of fusion of ice = 336 103 J kg 1] [3] Explain the term e.m.f. and state two differences between e.m.f. and terminal voltage [3]

Formatting page ...

ammavm chat

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