Here are some Updated-SS3 Physics Mock Exam Question and Answerthat you can practice in other to become perfect. After solving the questions you can check for the answer at the end of this page. You can also view Economics mock questions and answers here.
SS3 Physics Mock Exam and Answer
(1). Which of the following statements is not correct? (a) modules of ice, water and water vapour have equal intermolecular distances (b) molecules of ice, water and water vapour do not differ in the structure of their molecules (c) molecules of water vapour attracts each other with forces less than the forces of attraction between water molecules (d) water is less compressible than water vapour
(2) The density ρ of a spherical ball of diameter d and mass m is given by (a) ρ = (b) ρ = 4πmd³ (c) ρ = (d) ρ = πd³
(3) A metal rod of density 7000kkgm¯³ and cross—sectional area of 0.001257m¯² has a mass of 1.76kg. Calculate its length (a) 0.20m (b) 0.25m (c) 0.40m (d) 0.50m
Also See: Economics Mock Examination for SS3-Updated
(4) The pressure in a liquid (a) is the same at all points in the liquid (b) decreases with depth (c) is the same in all directions at a given point (d) is equal to the atmospheric pressure
(5) The property of a fluid that is used to determine its suitability as a lubricant is its (a) capability (b) viscosity (c) surface tension (d) relative density
(6) Which of the following substance is the most volatile at room temperature? (a) water (b) diesel (c) petrol (d) kerosene
(7) The area under a velocity-time graph represents (a) final velocity attained (b) distance covered (c) acceleration (d) work done
(8) In the absence of gravitational force, the weight of a body is (a) its mass (b) zero (c) its density (d) its volume
(9) A stone of mass 300g is released from rest from the top of a building of height 100m. Determine the kinetic energy gained by the stone when it is quarter way down from the point of release. (g= 10m/s²) . (a) 750.0 J (b) 225.0 J (c) 75.0 J (d) 22.5 J
(10) A body of mass 120g placed at the 10cm mark on a uniform metre rule makes the rule settle horizontally on a fulcrum placed at the 35cm mark. Calculate the mass of the rule (a) 60g (b) 80g (c) 120g (d) 200g
(11) Two simple pendula A and B of equal lengths and of masses 5g and 20g respectively are located in the same environment. The periods of Taand Tb of their respective oscillations are related by the equations (a) Ta = 4 Tb (b) Ta = Tb (c) Ta = Tb (d) Ta = 5Tb
(12) An object of mass 5.0kg moves with a velocity of 10m/s. Calculate its momentum (a) 50.0kg/ms (b) 15.0kg/ms (c) 2.0kg/ms (d) 0.5kg/ms
(13) A coin is pushed from the edge of a laboratory bench with horizontal velocity of 15.0m/s. If the height of the bench from the floor is 1.5m, Calculate the distance from the foot of the bench to the point of impact with the floor. (g= 10ms²) (a) 0.75m (b) 2.25m (c) 8.22m (d) 15.00m
(14) Which of the following statements correctly defines a simple machine? A device (a) that produce electric current (b) which can only carry people from one place to another (c) with which work can be done easily (d) which changes the state of rest or of uniform motion of an object
(15) The radius of a wheel is 30.0cm and that of its axle is 6.0cm. Calculate the effort required to lift a load of 120.0N using this machine, assuming 100% efficiency. (a) 600.0N (b) 40.0N (c) 24.0N (d) 20.0N
(16) Which of the following properties is not considered in choosing mercury as a thermometric liquid? (a) density (b) expansivity (c) conductivity (d) opacity
(17) A hypsometer is used for determining (a) steam point (b) relative humidity (c) ice point (d) opacity
Also See: Government Mock Exam Question and Answer For SS3
(18) Which of the following statements about anomalous expansion of water are correct? I. there is contraction between 0˚c and 40˚c II. There is expansion between 0˚c and 40˚c III. The volume is minimum at 4˚c IV. The volume is maximum at 4˚c (a) I and II only (b) II and III only (c) I and III only (d) II and IV only
(19) Which of the following equations shows how the linear expansivity (α) and the cubic expansivity (γ) of a material are related? (a) γ = α (b) γ = 1 – α (c) γ = 2α (d) γ = 3α
(20) Which of the following assumptions is not valid for an ideal gas? (a) molecules of a particular gas are identical (b) molecules moves freely throughout the volume of the container (c) force of attraction between molecules is negligible (d) molecules move at constant speed between collisions
(21) A body is pulled over a distance of 500m by a force of 20N. If the power developed is 0.4kW, calculate the time interval during which the force is applied (a) 0.2s (b) 2.5s (c) 25.0s (d) 250.0s
(22) A metal mass of 200g at a temperature of 100˚c is placed in 100g of water at 25˚c in a container of negligible heat capacity. If the final steady temperature is 30˚c, calculate the specific heat capacity of the metal. (specific heat capacity of water is 4200 J/kg/k) (a) 150J/kg/K (b) 300J/kg/K (c) 320J/kg/K (d) 1960J/kg/K
(23) Ether produces a cooling effect when it is poured on the hand because it has (a) low conductivity (b) high conductivity (c) high latent heat of vaporization (d) low latent heat of vaporization
(24) Which of the following statements about the image formed by a plane mirror is not correct? (a) it is laterally inverted (b) it has unit magnification (c) it is formed by actual intersection of rays (d) its distance from the mirror is equal to that of the object from the mirror
(25) The image formed by a convex mirror is always (a) real, erect and diminished (b) real, inverted and diminished (c) virtual, inverted and diminished (d) virtual, erect and diminished
(26) A ray undergoes a minimum deviation at 40˚ when it is incident on an equilateral triangular glass prism. Calculate the refractive index of the prism. (a) 1.48 (b) 1.50 (c) 1.53 (d) 1.67
(27) Total internal reflection occurs in an optical prism where light rays (a) travel from prism into an optically denser medium (b) are incident in the prism at an angle greater than the critical angle (c) are incident normally in the prism (d) travels from the prism to air
(28) The speed of light in a certain medium V while its speed in a vacuum is C. The absolute refractive index of the medium is (a) C + V (b) (c) (d) C – V
(29) An object is placed 20.0cm in front of a converging lens of focal length 15.0cm. Calculate its image distance. (a) 1.3cm (b) 8.6cm (c) 35.0cm (d) 60.0cm
(30)Presbyopia is a defect of the eye resulting from (a) weak ciliary muscles (b) short eyeball (c) loss of sphericity of the lens (d) long eyeball
(31) The focal length of the eye-piece of an astronomical telescope is f₁ while the focal length of the objectives is f₂. For normal adjustment, the angular magnification is given by (a) (b) 1 – (c) – 1 (d)
(32) Two sound waves have frequencies of 12hz and 10hz. Calculate their beat period. (a) 0.5s (b) 1.0s (c) 1.2s (d) 2.0s
(33) The main difference between echo and reverberation is that (a) reverberation is reflected sound while echo is refracted sound (b) the time interval between incident sound and reflected sound is shorter than reverberation (c) the amplitude of an echo is greater (d) reverberation is from acoustic speakers while echo comes from clifts
(34) Which of the following statements about electromagnetic waves is correct? (a) radio-waves have longer frequencies than X-rays (b) X-rays have the longest wavelength (c) some of the waves travel at 3.0 x 10⁸ m/s (d) white light occupies regions beyond ultraviolet rays
(35) The correct relationship between “G” and “g” in a gravitational field is given by the equation (where the symbols have their usual meanings) (a) g = (b) g = (c) g = (d) g =
(36) The capacitance of a parallel-plate capacitor (a) decreases when the separation between the plates decreases (b) increases when the potential difference between the plates is increased (c) is greater without a dielectric material between the plates than with dielectric (d) is greater with a dielectric between the plates than without dielectric
(37) When the pointed end of an uncharged optical pin is brought near the cap of a positively charged electroscope, it is observed that the gold leaves (a) collapse slowly (b) vibrate (c) are not affected (d) diverge rapidly
USE THE CIRCUIT DIAGRAM BELOW TO ANSWER QUESTION 38 AND 39
(38) Calculate the total charge in the circuit (a) 80μC(b) 35μC(c) 20μC (d) 16μC
(39) Calculate the potential difference across the capacitors in parallel (a) 10.0V (b) 8.0V (c) 6.7V (d) 2.0V
(40) Which of the following substances does not conduct electricity? (a) graphite (b) glass (c) sulphuric acid (d) table salt solution
(41) The unit of capacitance is (a) farad (b) coulomb (c) Henry (d) Ohm
(42) An ammeter with a full scale deflection of 10mA has internal resistance 0.5Ω. Calculate the resistance of the shunt required to adapt it to read up to 3A (a) 0.0017Ω (b) 0.0130Ω (c) 0.0250Ω (d) 0.1000Ω
(43) The resistivity , p, of a material of length l, cross-sectional area A, and resistance R, is given the equation (a) ρ = (b) ρ = (c) ρ = (d) ρ =
(44) A wire of length 30cm is moved with a speed of 2m/s at right angles to a magnetic field of flux density 0.4T. Calculate the emf induced in the wire (a) 0.15V (b) 0.24V (c) 2.70V (d) 24.00V
(45) Which of the following practices will lead to losses in electrical power transmission? (a) using transmission cable of large diameter (b) Transmitting at high voltage and low current (c) transmitting at relatively low voltage and high current (d) Using a step-up transformer at the production end
(46) For photoelectric emission, the threshold frequency is the (a) maximum frequency of incident radiation that will eject electrons (b) minimum frequency of incident radiation required to eject electrons (c) frequency which results in the emission of the greatest number of electrons (d) frequencies which impacts greatest kinetic energy to emitted electrons
(47) Which of the following properties is not applicable to X-rays? They (a) travel in straight lines (b) travel with the speed of light (c) are deflected by magnetic field (d) accept photographic films
(48) Uranium -234 disintegrated to form thorium -230 by emitting (a) alpha particles (b) gamma rays (c) beta negative rays (d) beta positive rays
Also Read: https://www.ucc.ie/en/physics/wiphysics/
(49) The change in mass of fuel during a nuclear reaction is 2.0 x 10 ¯²⁷kg. Calculate the amount of energy released (speed of light = 3.0 x 10⁸m/s) (a) 1.8 x 10¯¹⁰ J (b) 9.0 x 10¯¹¹ J (c) 6.0 x 10¯¹⁹ J (d) 1.2 x 10¯⁴⁵ J
(50) Nuclear fusion is not used as a source of energy because (a) very high temperature is needed for the reaction (b) the fuel for the reaction is not easy to obtain (c) less energy is released (d) the reaction is too slow
Theory for SS3 Physics Mock Exam Question and Answer
In the diagram illustrated above, a body of mass m slides on an inclined plane. Show that the coefficient of friction between the surfaces in contact tanϴ
- (2) A spiral spring with a metal extends by 10.5cm in air. When the metal is fully submerged in water, the spring extends by 6.8cm. Calculate the relative density of the metal. (assume hooke’s law is obeyed)
- A ray of light is incident on air-glass boundary at an angle ϴ. If the angle between the partially reflected ray and the refracted ray is 90˚, calculate ϴ, given that the refractive index of glass is 1.50
- (a) Explain the term electrodes in electric cells.
(b) An electric current passing through an electrolyte for 2 minutes deposited 200g of a substance is 8.33 x 10¯⁴g/C, Calculate the current passed.
(5). Explain why sound waves cannot be plane polarized.
(6) (a) Define surface tension (b) State two methods by which the surface tension of a liquid can be reduced
(7) Explain why it is desirable to install an air conditioner near the ceiling of a room and not close to the floor.
(8) (a) On what principle does lighting in a fluorescent tube operate? (b) State two factors which determine the colour of light produced in a fluorescent tube.
(9) The diagram above illustrates an arrangement of a cathode ray from an electron gun perpendicularly to the ray’s direction. Will the ray bend downward or upward? Explain.
(10) (a) Explain wave-particle duality of light.
(b) Illustrate your answer in 10(a) with observable phenomena
SECTION B
(11). (a) State the principle of conservation of linear momentum. (2marks). (b) Explain the mode of action of a propelled rocket. (3 marks) . (c) During a training session, two footballers pass a ball repeatedly between themselves. Give two reasons why the to and fro motion of the ball is not simple harmonic. (2 marks)
(d) A ball is dropped from a height, at the same time as another ball is projected horizontally from the same height.
(i) Would the balls hit the ground at the same time? (ii) Explain your answer in (i). (3 marks)
(e) A ball of mass 0.10kg is projected horizontally onto a vertical wall with speed of 17m/s. The ball makes contact with the wall for 0.15s and rebounds horizontally with a speed of 13m/s. Calculate the: (i) Change in momentum of the ball
(ii) Average force exerted on the ball during its collision with the wall. (5marks)
(12)(a)(i) What is a machine? (ii) State two uses of gears (iii) Define the velocity ratio for a pair of gear wheels
(iv) How can the mechanical advantage of a gear system be increases? (8marks)
Answers to Updated-SS3 Physics Mock Exam Question and Answer
- (a)
2. (c) ρ = 6mπd3\frac{6m}{\pi d^3}πd36m
3. (b) 0.25m
4. (c) is the same in all directions at a given point
5. (b) viscosity
6. (c) petrol
7. (b) distance covered
8. (b) zero
9. (b) 225.0 J
10. (b) 80g
11. (c) Ta = Tb
12. (a) 50.0 kg/ms
13. (b) 2.25m
14. (b) 40.0N
15. (d) opacity
16. (a) steam point
17. (b) II and III only
18. (d) γ = 3α
19. (d) molecules move at constant speed between collisions
20. (d) 250.0s
21. (b) 300J/kg/K
22. (d) low latent heat of vaporization
23. (c) it is formed by actual intersection of rays
24. (d) virtual, erect and diminished
25. (b) 1.50
26. (b) are incident in the prism at an angle greater than the critical angle
27. (c) C / V
28. (c) 35.0cm
29. (a) weak ciliary muscles
30. (a) f₂ / f₁
31. (a) 0.5s
32. (b) the time interval between incident sound and reflected sound is shorter than reverberation
33. (c) some of the waves travel at 3.0 x 10⁸ m/s
34. (b) g = GM / r²
35. (d) is greater with a dielectric between the plates than without dielectric
36. (d) diverge rapidly
37. (a) 80μC
38. (a) 10.0V
39. (b) glass
40. (a) farad
41. (b) 0.0130Ω
42. (a) ρ = RAl\frac{RA}{l}lRA
43. (b) 0.24V
44. (c) transmitting at relatively low voltage and high current
45. (b) minimum frequency of incident radiation required to eject electrons
46. (c) are deflected by magnetic field
47. (a) alpha particles
48. (b) 9.0 x 10¯¹¹ J
49. (a) very high temperature is needed for the reaction
Leave a Reply