2010 JAMB PHYSICS PAST QUESTIONS AND ANSWERS Leave a Comment / Jamb Physics / By Jamb Tutor Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% Created by Jamb TutorJamb Physics 2010 JAMB PHYSICS PAST QUESTIONS AND ANSWERS 1 / 50 Category: JAMB Physics 2010 1. Which Physics Question Paper Type is given to you? a) Type A. b) Type B. c) Type C. d) Type D. This is a standard question to identify the type of paper. 2 / 50 Category: JAMB Physics 2010 2. Two cars move in same direction at 100 km/h and 130 km/h. Velocity of the faster car relative to slower car? a) 130 km/h. b) 230 km/h. c) 200 km/h. d) 30 km/h. Relative velocity = velocity of faster car – velocity of slower car = 130 – 100 = 30 km/h. 3 / 50 Category: JAMB Physics 2010 3. The car decelerates between points F and H in the velocity-time graph. a) Decelerates F-H. b) Accelerates F-G. c) Constant E-F. d) No acc F-G. The slope of the graph between F and H is negative, indicating deceleration. 4 / 50 Category: JAMB Physics 2010 4. A stone and a feather dropped from the same height on Earth without air resistance will? a) Same time. b) Stone first. c) Feather first. d) Feather blown. Both objects fall at the same rate due to gravity when air resistance is ignored. 5 / 50 Category: JAMB Physics 2010 5. A car accelerates from 25 ${ms}^{-1}$ to 45 ${ms}^{-1}$ in 10 s. What is acceleration? a) 5 ${ms}^{-2}$. b) 25 ${ms}^{-2}$. c) 20 ${ms}^{-2}$. d) 2 ${ms}^{-2}$. Acceleration = (final velocity – initial velocity) / time = (45 – 25) / 10 = 2 ${ms}^{-2}$. 6 / 50 Category: JAMB Physics 2010 6. Observation of mass and weight of an object in different Earth locations? a) Mass/Weight vary. b) Weight constant. c) Mass constant. d) Mass/Weight const. Weight varies due to gravity, but mass is constant. 7 / 50 Category: JAMB Physics 2010 7. Stable equilibrium positions in undulating surface diagram? a) II, V, VIII. b) I, II, VII. c) III, VI, IX. d) III, IV, VIII. Stable equilibrium occurs at the lowest points. 8 / 50 Category: JAMB Physics 2010 8. Work done to pull a 0.1N bob until string makes 60° angle? a) 0.250 J. b) 0.025 J. c) 0.050 J. d) 0.500 J. Work = 0.1N × 0.5m × cos(60°) = 0.025 J. 9 / 50 Category: JAMB Physics 2010 9. Why are conveyor belts made rough? a) Prevent slipping. b) Make stronger. c) Carry more load. d) Protect them. Rough surface prevents load from slipping. 10 / 50 Category: JAMB Physics 2010 10. Efficiency of a machine with VR = 6, Effort = 400N, Load = 800N, distance = 1m? a) 50%. b) 22.2%. c) 33.3%. d) 55.6%. Efficiency = (load × load distance) / (effort × effort distance) = 50%. 11 / 50 Category: JAMB Physics 2010 11. Strain energy for wire extended by 0.5cm with force 300N? a) 7.50 J. b) 750.00 J. c) 75.00 J. d) 0.75 J. Strain energy = 0.5 × force × extension = 0.5 × 300 × 0.005 = 0.75 J. 12 / 50 Category: JAMB Physics 2010 12. Force on second piston of hydraulic press with pressure 100 Pa, area ${3m}^{2}$? a) 200 N. b) 100 N. c) 150 N. d) 300 N. Force = pressure × area = 100 × 3 = 300 N. 13 / 50 Category: JAMB Physics 2010 13. Accurate measurement of relative density of powdered substance? a) Eureka can. b) Burette. c) Pipette. d) Density bottle. A density bottle is ideal for measuring the relative density of powdered substances accurately. 14 / 50 Category: JAMB Physics 2010 14. Hydrometer measures what property? a) Density. b) Rel. density. c) Rel. humidity. d) Vap. pressure. A hydrometer is used to measure the relative density of a liquid. 15 / 50 Category: JAMB Physics 2010 15. Special advantage of alcohol over mercury as thermometric liquid? a) Low freezing pt. b) Low boiling pt. c) High spec. heat. d) Low density. Alcohol has a lower freezing point, making it suitable for very cold environments. 16 / 50 Category: JAMB Physics 2010 16. Ratio of increase in lengths of two metals (P and Q)? a) 5:07 b) 2:01 c) 1:02 d) 7:05 Increase ratio = (length ratio) × (expansivity ratio) = (3/4) × (2/3) = 1/2. 17 / 50 Category: JAMB Physics 2010 17. Initial volume of oil with density change from 0.8 ${kg/m}^{3}$ to 0.4 ${kg/m}^{3}$? a) 10 ${m}^{3}$. b) 5 ${m}^{3}$. c) 8 ${m}^{3}$. d) 12 ${m}^{3}$. Initial volume = final volume × (final density/initial density) = 20 × (0.4/0.8) = 10 ${m}^{3}$. 18 / 50 Category: JAMB Physics 2010 18. Radiated heat from hot objects is in what form? a) Light energy. b) Solar energy. c) Infrared rays. d) X-rays. Heat is radiated in the form of infrared rays. 19 / 50 Category: JAMB Physics 2010 19. What happens to water level when ice in a container melts? a) Overflows. b) Drops. c) Unchanged. d) Goes up. Water level remains unchanged due to displacement being equal to melted volume. 20 / 50 Category: JAMB Physics 2010 20. What is dew? a) Dew. b) Mist. c) Fog. d) Hail. Dew is the water droplet that condenses on surfaces due to cooling below the dew point. 21 / 50 Category: JAMB Physics 2010 21. Condition for saturated vapour? a) More returns. b) Atm. pressure. c) Temp. varies. d) Dynamic eqm. Saturation occurs when a dynamic equilibrium exists between evaporation and condensation. 22 / 50 Category: JAMB Physics 2010 22. Pressure of ideal gas with volume ${10}^{-2}$ ${m}^{3}$ at ${27}^{\circ}$C? (R = 8.3 J/mol-K) a) 2.24 × ${10}^{4}$. b) 2.24 × ${10}^{5}$. c) 2.49 × ${10}^{5}$. d) 2.49 × ${10}^{4}$. Pressure = (nRT/V); T in Kelvin = 300, P = 1 × 8.3 × 300 / ${10}^{-2}$ = 2.49 × ${10}^{5}$ ${Nm}^{-2}$. 23 / 50 Category: JAMB Physics 2010 23. What does not affect radiation? a) Density. b) Temperature. c) Surface area. d) Surface nature. Radiation is not affected by density. 24 / 50 Category: JAMB Physics 2010 24. Period of wave with velocity 420 ${ms}^{-1}$ and wavelength 42 m? a) 1.0 s. b) 0.1 s. c) 0.5 s. d) 1.2 s. Period = wavelength/velocity = 42/420 = 0.1 s. 25 / 50 Category: JAMB Physics 2010 25. Why does the sound of an electric bell fade in a vacuum? a) No pass. b) Pass vacuum. c) Needs medium. d) Wavelength grows. Sound requires a material medium to propagate, and there is none in a vacuum. 26 / 50 Category: JAMB Physics 2010 26. Why is sound heard longer during a thunderstorm? a) Refraction. b) Reverberation. c) Superposition. d) Diffraction. Reverberation occurs due to reflection of sound waves from multiple surfaces, prolonging the sound. 27 / 50 Category: JAMB Physics 2010 27. Velocity of sound in air at ${127}^{\circ}$C when initial velocity is 340 ${ms}^{-1}$ at ${16}^{\circ}$C? a) 4,000 ${ms}^{-1}$. b) 160,000 ${ms}^{-1}$. c) 8,000 ${ms}^{-1}$. d) 400 ${ms}^{-1}$. Velocity increases with the square root of temperature ratio in Kelvin. Final velocity = 400 ${ms}^{-1}$. 28 / 50 Category: JAMB Physics 2010 28. Film of a camera functions as which part of the eye? a) Iris. b) Pupil. c) Cornea. d) Retina. The film of a camera is analogous to the retina in the human eye, capturing light. 29 / 50 Category: JAMB Physics 2010 29. Image size for object 15 cm from a concave mirror of focal length 5 cm? a) 3 cm. b) 5 cm. c) 4 cm. d) 2 cm. Use magnification = image height/object height = v/u where v = 7.5 cm, height is 4 cm. 30 / 50 Category: JAMB Physics 2010 30. Apparent depth of object 10 cm in ice with refractive index 1.50? a) 6.7 cm. b) 7.63 cm. c) 7.50 cm. d) 2.50 cm. Apparent depth = real depth/refractive index = 10/1.5 = 7.50 cm. 31 / 50 Category: JAMB Physics 2010 31. Which lens corrects short-sightedness? a) Concave lens. b) Concave mirror. c) Convex mirror. d) Convex lens. A concave lens diverges light rays to correct short-sightedness (myopia). 32 / 50 Category: JAMB Physics 2010 32. Reason for dispersion of white light through a prism? a) Diff. speeds. b) High density. c) Glass defects. d) Hidden colours. Colours travel at different speeds in the prism due to varying refractive indices. 33 / 50 Category: JAMB Physics 2010 33. What happens when a positively charged rod approaches a similar electroscope? a) Converge. b) Constant. c) Diverge. d) Induced. The electroscope’s leaves diverge further due to increased positive charge repulsion. 34 / 50 Category: JAMB Physics 2010 34. Total energy stored in capacitors (2μF, 4μF, 8μF) with V = 6 V? a) 6.90 × ${10}^{-6}$. b) 6.90 × ${10}^{-4}$. c) 2.52 × ${10}^{-4}$. d) 2.52 × ${10}^{-6}$. Total capacitance = sum since parallel. Energy = $\frac{1}{2}CV^{2}$ = 2.52 × ${10}^{-4}$ J. 35 / 50 Category: JAMB Physics 2010 35. Current flow in cell of emf 12 V and internal resistance 4 Ω with 2 Ω load? a) 4:00 AM b) 2:00 AM c) 3:00 AM d) 5:00 AM Current = emf/total resistance = 12/(4 + 2) = 2 A. 36 / 50 Category: JAMB Physics 2010 36. Balanced metre bridge value of x? a) 66.7 cm. b) 25.0 cm. c) 33.3 cm. d) 75.0 cm. Based on metre bridge principles, the balance point corresponds to x = 33.3 cm. 37 / 50 Category: JAMB Physics 2010 37. Total current for 16 V applied to three 4 Ω resistors in parallel? a) 12:00 AM b) 8:00 AM c) 10:00 AM d) 14 A. Equivalent resistance = 1/(1/4 + 1/4 + 1/4) = 4/3 Ω. Current = V/R = 16/(4/3) = 12 A. 38 / 50 Category: JAMB Physics 2010 38. Cost of keeping 200 W bulb on for 24 hours at 1 kWh = N40? a) N192.00. b) N1.92. c) N19.20. d) N1920.00. Energy = power × time = 0.2 kW × 24 h = 4.8 kWh. Cost = 4.8 × N40 = N192. 39 / 50 Category: JAMB Physics 2010 39. Why is power supply transmitted at high voltage? a) Increase power. b) Prevent heating. c) Travel faster. d) Pass transformers. High voltage reduces current, minimizing energy losses due to heating (${I}^{2}$R losses). 40 / 50 Category: JAMB Physics 2010 40. Polarities at T and V when two south poles stroke steel bar? a) North/South. b) South/South. c) North/North. d) South/North. Stroking by similar poles produces similar polarities; T and V both become north poles. 41 / 50 Category: JAMB Physics 2010 41. Resistance of galvanometer if series resistance is 498 Ω with 10 mA full-scale deflection for 5 V voltmeter? a) 2 Ω. b) 10 Ω. c) 5 Ω. d) 1 Ω. Resistance = V/I – series resistance = 5/0.01 – 498 = 2 Ω. Resistance is 2 Ω. 42 / 50 Category: JAMB Physics 2010 42. Total energy stored in inductors (5 mH and 15 mH in series) with 5 A current? a) 250 J. b) 50 J. c) 62.5 J. d) 500 J. Total inductance = 5 + 15 = 20 mH. Energy = $\frac{1}{2}LI^{2}$ = 0.5 × 0.02 × 25 = 250 J. 43 / 50 Category: JAMB Physics 2010 43. Angle of lead or lag in alternating current circuit at resonance? a) $\frac{\pi}{2}$°. b) 0 °. c) $\frac{\pi}{3}$°. d) $\pi$ °. At resonance, inductive reactance equals capacitive reactance, and phase angle is zero. 44 / 50 Category: JAMB Physics 2010 44. Slope of mass deposited vs. quantity of electricity graph in Faraday’s law of electrolysis? a) Electrochemical equivalent. b) Charge released. c) Current flowing. d) Energy released. The slope represents the electrochemical equivalent (mass per unit charge). 45 / 50 Category: JAMB Physics 2010 45. Why is gas mostly pumped out in a discharge tube for conducting electricity? a) High pressure. b) High pressure. c) Low voltage. d) Steady voltage. Low pressure allows ions and electrons to move freely, enabling conduction. 46 / 50 Category: JAMB Physics 2010 46. Resulting mass and atomic numbers when ${235}$U emits 2 alpha and 3 beta particles? a) 91 and 227. b) 92 and 238. c) 227 and 91. d) 215 and 88. Each alpha emission reduces mass by 4, atomic number by 2; each beta increases atomic number by 1. Result: 227 and 91. 47 / 50 Category: JAMB Physics 2010 47. Frequency of emitted radiation when energy difference is 5.44 × ${10}^{-19}$ J (h = 6.6 × ${10}^{-34}$ Js)? a) 2.0 × ${10}^{16}$ Hz. b) 2.0 × ${10}^{15}$ Hz. c) 5.0 × ${10}^{15}$ Hz. d) 5.0 × ${10}^{16}$ Hz. Frequency f = $\frac{\Delta E}{h}$ = $\frac{5.44 \times 10^{-19}}{6.6 \times 10^{-34}}$ = 8.24 × ${10}^{14}$ Hz. 48 / 50 Category: JAMB Physics 2010 48. Primary function of transistors in electronics? a) A.C. to D.C. b) D.C. to A.C. c) Amplification. d) Rectification. Transistors amplify signals in electronics, serving as active components in circuits. 49 / 50 Category: JAMB Physics 2010 49. Typical pure semiconductor material? a) Silicon. b) Phosphorus. c) Transistor. d) Carbon. Pure silicon is a widely used intrinsic semiconductor due to its balanced conduction properties. 50 / 50 Category: JAMB Physics 2010 50. Radioactive decay resulting in alpha and beta emissions forms what nucleus? a) 91 and 227. b) 92 and 238. c) 227 and 91. d) 215 and 88. Each alpha reduces atomic mass by 4, atomic number by 2; beta adds 1 to atomic number. Result: 227 and 91. Your score is The average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Anonymous feedback Send feedback
