PHYSICS JAMB CBT
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This is suitable for prospective candidate of 2018 Unified Tertiary Matriculation Examination (UTME) Computer Based Test (CBT). This tool will prepare candidates with a time based test in order to equip candidates with the right frame of mind going into the exams. This test comprises of 50 questions with only 35mins allotted time.
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Question 1 of 50
1. Question1 points
I. The earth is not spherical but elliptical in shape.
II. Variation in latitude and longitude.
III. Rotation of the earth on its axis.
IV. Variation in the density of the earth.
On which combination of the above does the weight of an object vary on the earth’s surface?
Question 2 of 50
2. Question1 points
If a spherical metal bob of radius 3cm is fully immersed in a cylinder containing water and the water level rises by 1cm, what is the radius of the cylinder?
Question 3 of 50
3. Question1 points
The efficiency of a machine is always less than 100% because the
Question 4 of 50
4. Question1 points
The height at which the atmosphere ceases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is
Question 5 of 50
5. Question1 points
Which of the following consists entirely vector quantities?
Question 6 of 50
6. Question1 points
The diagram below is a block-and-tackle pulley system in which an effort of 80N is used to lift a load of 240N. The efficiency of the machine is
Question 7 of 50
7. Question1 points
A stone of mass 1kg is dropped from a height of 10m above the ground and falls freely under gravity. Its kinetic energy 5m above the ground is then equal to
Question 8 of 50
8. Question1 points
In the diagram above, which of the simple pendula will resonate with P when set into oscillation?
Question 9 of 50
9. Question1 points
The terrestrial telescope has one extra lens more than the astronomical telescope. The extra lens is for
Question 10 of 50
10. Question1 points
A string is fastened tightly between two walls 24cm apart. The wavelength of the second overtone is
Question 11 of 50
11. Question1 points
The thermometric substance of an absolute thermometer is
Question 12 of 50
12. Question1 points
Ice cubes are added to a glass of warm water. The glass and water are cooled by
Question 13 of 50
13. Question1 points
A working electric motor takes a current of 1.5A when the p.d. across it is 250V. If its efficiency is 80%, the power output is
Question 14 of 50
14. Question1 points
In a Daniel Cell, the depolarizer, positive and negative electrodes are respectively
Question 15 of 50
15. Question1 points
The cost of running five 6W lamps and four 100W lamps for 20 hours if electrical energy costs N10.00 per KWh is
Question 16 of 50
16. Question1 points
When a piece of rectangular glass block is inserted between two parallel plate capacitors, at constant plate area and distance of separation, the capacitance of the capacitor will
Question 17 of 50
17. Question1 points
The process of energy production in the sun is
Question 18 of 50
18. Question1 points
I. Low pressure.
II. High pressure.
III. High p.d.
IV. Low p.d.
Which combination of the above is true of the conduction of electricity through gases?
Question 19 of 50
19. Question1 points
A transistor functions mainly as a
Question 20 of 50
20. Question1 points
Which of the following metals will provide the greatest shield against ionizing radiation?
Question 21 of 50
21. Question1 points
Energy losses through eddy currents are reduced by using
Question 22 of 50
22. Question1 points
The magnetic force on a charged particle moving with velocity v is
Question 23 of 50
23. Question1 points
The force on a current carrying conductor in a magnetic field is greatest when the
Question 24 of 50
24. Question1 points
The primary coil of a transformer has N turns and is connected to a 120V a.c. power line. If the secondary coil has 1000 turns and a terminal voltage of 1200 volts, what is the value of N?
Question 25 of 50
25. Question1 points
A copper cube weights 0.25 N in air, o.17N when completely immersed in paraffin oil and o.15N when completely immersed in water. The ratio of upthrust in oil to upthrust in water is
Question 26 of 50
26. Question1 points
A wheel and axle is used to raise a load of 500 N by the application of an effort of 250N. If the radii of the wheel and the axle are 0.4cm and o.1cm respectively, the efficiency of the machine is
Question 27 of 50
27. Question1 points
If the distance between two suspended masses 10kg each is tripled, the gravitational force of attraction between them is reduced by
Question 28 of 50
28. Question1 points
If the total force acting on a particle is zero, the linear momentum will
Question 29 of 50
29. Question1 points
the effect of a particle in a fluid attaining its terminal velocity is that the
Question 30 of 50
30. Question1 points
A coin placed below a rectangular glass block of thickness 9cm and refractive index 1.5 is viewed vertically above the Joint Admissions and Matriculation Board block. The apparent displacement of the coin is
Question 31 of 50
31. Question1 points
The radiator of a motor car is cooled by
Question 32 of 50
32. Question1 points
II. Density of air molecules.
Which of the above will affect the velocity of sound in air?
Question 33 of 50
33. Question1 points
Which of the following is a characteristic of stationary wave?
Question 34 of 50
34. Question1 points
To produce an enlarged and erect image with a concave mirror, the object must be positioned
Question 35 of 50
35. Question1 points
The property that is propagated in a traveling wave is
Question 36 of 50
36. Question1 points
Which of the following eye defects can be corrected using a cylindrical lens?
Question 37 of 50
37. Question1 points
The time rate of loss of heat by a body is proportional to the
Question 38 of 50
38. Question1 points
A concave mirror of radius of curvature 40cm forms a real image twice as large as the object. The object distance is
Question 39 of 50
39. Question1 points
Water is a poor thermometric liquid because it
Question 40 of 50
40. Question1 points
A ray of light which strikes a glass slab from air at normal incidence passes through the slab
Question 41 of 50
41. Question1 points
Blowing air over a liquid aids evaporation by
Question 42 of 50
42. Question1 points
The phenomenon that makes sound persist when its source has been removed is known as
Question 43 of 50
43. Question1 points
Vibration in a stretched spring cannot be polarized because they are
Question 44 of 50
44. Question1 points
The colours seen in soap bubbles are due to
Question 45 of 50
45. Question1 points
When connected to a mains of 250V, the fuse rating in the plug of an electric device of 1 kW is
Question 46 of 50
46. Question1 points
The eye controls the amount of light reaching the retina by adjusting the
Question 47 of 50
47. Question1 points
An electric iron is rated 1000W, 230V. What is the resistance of its element?
Question 48 of 50
48. Question1 points
The electromagnetic wave that can produce a heating effect on the environment is
Question 49 of 50
49. Question1 points
From the generating station to each substation, power is transmitted at a very high voltage so as to reduce
Question 50 of 50
50. Question1 points
The particle that is responsible for nuclear fission in a nuclear reactor is
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