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