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1 What is the least possible error encountered when taking measurement with a meter rule? A 0.1mm B 1.0mm C 0.5mm D 0.2mm
2 A quantity which requires magnitude and direction to be specified is A Temperature B Distance C Displacement D Mass
3 I Electrical potential, II Torque, III Kinetic Energy, IV Momentum. Which of the quantities listed are vectors? A II and IV B I and II C I and III D II and III
4 Which type of motion do the wheels of a moving car undergo? A Vibratory and translational motion B Random and translational motion C Rotational mand oscillatory motion D Translational and rotational motion
5 A car accelerates uniformly from rest at 3ms-2. its velocity after traveling a distance of 24m is A 12ms-1 B 144ms-1 C 72ms-1 D 36ms-1
6 Calculate the escape velocity of a satellite launched from the earth’s surface if the radius of the earth is 6.4x106m A 25.3kms-1 B 4.2kms-1 C 4.0kms-1
D 11.3kms-1
7 An object of weight 80kg on earth is taken to a planet where acceleration due to gravity is one-third of its value on earth. The weight of the object on the planet is A 48N B 12N C 27N D 36N
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8 One of the conditions necessary for an object to be in equilibrium when acted upon by a number of parallel forces is that the vector sum of the forces is
A Average B Zero C Negative D Positive
9 What happens when three coplanar non-parallel forces are in equilibrium? A Their lines of action are parallel. B They are represented in magnitude only C They are represented in direction only D Their lines of action meet at a point
10 An object of mass 20kg is released from a height of 10m above the ground level. The kinetic energy of the object just before it hits the ground is
A 200J B 4000J C 2000J D 500J
11 The energy in the nucleus of atoms produce heat which can be used to generate A Kinetic energy B Mechanical energy C Electrical energy D Potential energy
12 A machine whose efficiency is 75% is used to lift a load of 1000N. Calculate the effort put in to the machine if it has a Velocity ratio of 4. A 343.32N B 233.33N C 333.33N D 334.33N
13 A wheel and an axle is used to raise a load whose weight is 800N when an effort of 250N is applied. If the radii of the wheel and axle are 800mm and 200mm respectively, the efficiency of the machine is A 90% B 80% C 85% D 87%
14 A force of 500N1 is applied to a steel wire of cross-sectional area 0.2m2, The tensile stress is A 2.5x104Nm-2 B 1.0x102Nm-2 C 1.0x103Nm-2 D 2.5x103Nm-2 Visit EduNgr.com for FREE educational resources, school news, past questions, and more…
15 The small droplets of water that form on the grass in the early hours of the morning is A Fog B Haul
C Mist D Dew
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16 What is the equivalent of 20K in Celsius scale?
A 20oC B 293oC C 68oC D 36oC
17 The equation PaVbTc= constant reduces to Charles Law if A a=1, b=1and c=0
B a=1, b=0 and c=-1 C a=0, b=1 and c=1 D a=0, b=1 and c=-1
18 The quantity of heat needed to raise the temperature of a body by 1K is the body’s A Heat capacity B Internal energy C Specific heat capacity D Latent heat of fusion
19 The melting point of a substance is equivalent to its A Vapour Pressure
B Solidification Temperature C Liquidification Temperature D Solidification Pressures
20 The temperature at which the water vapour present in the air is just sufficient to saturate air is A Boiling point B Ice point C Saturation point D Dew point
21 Heat transfer by convection in a liquid is due to the
A Latent heat of vaporization of the liquid B Increased vibration of the molecules of the liquid about theit mean position C Variation of density of the liquid D Expansion of the liquid as it is heated
22 The distance between two successive crests of a wave is 15cm and the velocity 300ms-1. Calculate the frequency. A 2.0x102Hz B 4.5x103Hz C 2.0x103Hz D 4.5x102Hz
23 A boy receives the echo of his clap reflected by a nearby hill 0.8s later. How far is he from the hill? A 528m B 66m C 136m D 264m
24 An object is placed 10m from a pinhole camera of length 25cm. Calculate the linear magnification. A 2.5×102 B 2.5×10-2 C 2.5×10-1 D 2.5×101
25 The focal length of a concave mirror is 2.0cm. If an object is placed 8.0cm from it, the image is at A 2.7m B 2.0m C 2.3m D 2.5m
26 In a compound microscope, the objective and the eye piece focal lengths are A At infinity B Long C Short D The same
27 When a telescope is in normal use, the final image is at A Infinity B The focus C The radius of curvature D The near point
28 When a negatively charged rod is brought near the cap of a charged gold leaf electroscope which has positive charges, the leaf A Remains the same B Collapses C Collapses and diverges again D Diverges
29 What charge is stored in a 0.1F capacitor when a 10V supply is connected across it? A 1C B 5C C 4C D 2C
30 The maximum power transfer occur in a cell when the external resistance is A Twice the internal resistance of the cell B The same as the internal resistance of the cell C Greater than the internal resistance of the cell
D Less than the internal resistance of the cell
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31 If a metal wire 4m long and cross-sectional area 0.8 mm2 has a resistance of 60, find the resistivity of the wire A 5.3×10-7 B 3.0×10-5 C 1.2×10-6 D 3.2×10-6
32 A circuit has a resistance of 200?. The resistance of the circuit can be reduced to 120? when A A 300? resistor is connected to it in parallel
B An 80? resistor is conneceted to it in series C A 150? resistor is connected to it in parallel D A 240? resistor is connected to it in series
33 PHCN measures its electrical energy in
A W B KWh C Wh D J
34 What is the best method of demagnetizing a steel bar magnet? A Hammering B Heating it
C Rough handling it D Solenoid method
35 The magnitude of the angle of dip at the equator is A 360o B 0o C 90o D 180o
36 When an atom undergoes a beta decay, the atomic number of the nucleus A Remains unchanged B Decreases by one C Increases by one D Becomes zero
37 Calculate the mass of the copper deposited during electrolysis when a current of 4A passes through a copper salt for 2 hours. [Ece of Copper z=3.3×10-7kgC-1] A 2.9x105kg B 9.5×10-7kg C 9.5×10-3kg D 2.9x104kg
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38 Which gas produces a pink coloured light in a discharge tube? A Mercury B Argon C Air D Neon
39 In a common emitter configuration, the output voltage is through the A Resistor B Base C Collector D Emitter
40 When decays to , it emits
A two alpha and two beta particles B an alpha particle C one beta particle D one alpha and one beta particle
41 What type of reaction is represented by the equation A Ionization B Fusion C Fission
Pb210 82 Pb 206 80
X X Y n + Energy2 1 +2 1 ?3 2 +1 0
D Chain
42 A glass bottle of initial volume 2 x 104 cm3 is heated from 20oC to 50oC. If the linear expansivity of glass is 9 x 106K-1, the volume of the bottle at 50oC is A 20016.2cm3 B 20005.4cm3 C 20008.1cm3 D 20013.5cm3
Answers: JAMB Past Questions: JAMB » Physics »
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1. C
2.C Displacement is a vector quantity
3. A
4. D
5. A V2 = U2 x 2ax V2 = 0 x 2(3)(24) V2 = 144 V = V = 12ms-1
6. D Vescape = Vescape = Vescape = 144 — -v 2gR – – — v 2 × 10 × 6.4 × 106 – – ————v 128000000 – – ——v
Vescape = 11313.7085mS-1 Vescape = 11.313kmS-1
7. C
8. B
9. D Conditions for non-parallel coplanar forces
10. C Kinetic Energy = mgh = 20 x 10 x 10 J = 2000J
11. A
12. C
× = efficiencyM A VR 100 1
× = 75L E 1 VR 100 1
× = 751000 E 1 4 100 1
E = 333.3N
13. B VR = 800/200 = 4
= 78.74% = 80%
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14. D
= 2.5 x 103Nm-3
15. D
16. B
E = 250×100 75
Efficiency = × MA VR
100 1
Efficiency = × × L E 1 VR
100 1
Efficiency = × × 800 250 1 4
100 1
Stress = Force Area
Stress = = 2500 500 0.2
273 + 20 = 293
17. D if a=0, b=1 and c=-1 then P0V1T-1 = V/T (Charles Law)
18. A
19. B
20. D
21. D
22. C Wavelength = 15cm = 0.15m
Velocity = 300m/s
V = fx
F = V/Wavelength
F = 300/0.15 Hertz
F = 2 x 103Hz
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23. C Time for echo both ways = 0.8 Therefore time for echo in 1 way = 0.8/2 = 0.4
Distance = Speed x time
Distance = 340 x 0.4
Distance = 136m
24. B
25. A
Linear Magnification = Length of Camera Distance of the Object
Linear Magnification = 25 1000
Linear Magnification = 2.5 × 10-2
+ =1 U 1 V
1 f
+ =1 8 1 V
1 2
26. C
27. A
28. B
29. B Q = CV = 0.1 x 10 = 1C
30. B
31. C
32. A
V = 8 3
V = 2.7cm
P = Om Ra L
P = Om 6×0.8 4
P = 1.2 × Om 10-6
For parallel resistance,
Therefore it is when a 300? resistor is connected to it in parallel
33. B
34. D
35. B
36. C
37. C Mass = ZIT kg Mass = 3.3 x 10-7 x 4 x 2 x 60 x 60 kg Mass = 9.5 x 10-3kg
38. C
39. D
40. B
300×200 500
= 120O
41. B
42. A
V2 – 2 x 104 = 2 x 104 (30) x 3 (9 x 10-6)
V2 = 2 x 104 2 x 104 (30) x 3 (9 x 10-6)
V2 = 16.2 + 2 x 104 V2 = 20016.2cm3
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