PHYSICS 2020 UTME PAST QUESTION
1. The figure above shows two boxes placed on the top of a table. If the boxes are equal in weight, it can be deducted that.
A. The pressure exerted by A is greater than that of B.
B. The pressure exerted by B is greater than that of A.
C. The pressure exerted by A is equal to that of B
D. The boxes with greater exerts the greater pressure.
2. A ball of mass 0.5kg moving at 10m/s collides with another ball of equal mass at rest, if the two balls move together after the impact, calculate the velocity with which they do this
A. 20m /s
B. 10m/s
C. 5m/s
D. 0.5r/s
3. Which of the following energy conversion takes place when a catapult is used to project a stone?
A. The elastic potential energy of the catapult is converted into kinetic energy of the stone
B. The gravitational potential energy is converted into elastic potential energy
C. The kinetic energy of the catapult is into the kinetic energy of the stone
D. The catapult is converted into the kinetic energy of the stone
4. Which of these equations gives the relationship between linear speed v and angular speed w of a body moving uniformly in a circle of radius r?
A. v=w
2
r
B. v=wr
C. v=wr
2
D. v=w/r
5. what is the effect of using split – ring in a simple d.c. generator?
A. The direction of rotation of the coil is reversed
B. The current in the coil flows in the same directions
C. The current in the coil became alternating
D. The contact with the voltage source is cut off
6. A mass of gas at 17
o
C and 700mmHg has a volume of 1.2m
3
. determine its volume at 27
o
C and pressure at 750mmHg.
A. 2.2m
3
B. 1.2m
3
C. 4.8m
3
D. 3.0m
3
7. It takes 4 minutes to boil a quantity of water electrically. How long will it take to boil the same quantity of water using the same heating coil but with the current doubled?
A. 32 mins
B. 8 mins
C. 2 mins
D. 1 mins
8. The following are vector quantities except
A. Momentum
B. Force
C. Kinetic energy
D. Magnetic induction
9. A plane inclined at an angle of 30
o
to the horizontal has an efficiency of 50%. The force parallel to the plane required to push a load of 500N up the plane is
A. 500N
B. 1000N
C. 250N
D. 333.33N
10. A man of mass 77kg stand on a springs – weighting machine inside a lift. When the lifts start to ascend, its acceleration is 2m/s
2
. What will be the reading on the machine?
A. 770N
B. 924N
C. 154N
D. 616N
11. Dry hydrogen is trapped by a pellet of mercury in a uniformed capillary tube closed one end. If the length of the column of hydrogen at 27
o
is 1.0m, at what temperature will the length be 1.20m?
A. 22.5
o
C
B. 32.4
o
C
C. 77
o
C
D. 87
o
C
12. The nucleon number and the atomic number of a neutral atom of an element are 238 and 92 respectively. What is the number of neutrons in the atoms?
A. 165
B. 146
C. 119
D. 73
13. A body moves with constant speed but has an acceleration. This is possible if it
A. Moves in a straight line
B. Is oscillating
C. Moves in a circles
D. Has a varying acceleration
14. A ball is projected horizontally from the top of a hill with a velocity of 20m/s. if it reach the ground 4 seconds later. What is the height of the hill?
A. 20m
B. 40m
C. 60m
D. 80m
15. The product PV where P is pressure and V IS volume has the same unit as
A. Power
B. Work
C. Acceleration
D. Impulse
16. An image which can be formed on a screen is said to be
A. Virtual
B. Blurred
C. Real
D. Erect
17. Which of the following is stored by a dry Leclanche cell?
A. Chemical energy
B. Nuclear energy
C. Electrical energy
D. Heat energy
18. A given mass of gas at a temperature of 30
o
C is trapped in a tubed of volume V. calculate the temperature of gas when volume is reduced to two- third of its original value by applying a pressure twice the original
A. -71
o
C
B. 40
o
C
C. 131
o
C
D. 404
o
C
19. The function of the manganese (IV) oxide in a Leclanche cell is to
A. Decrease the e.m.f. of the cell
B. prevent local action
C. prevent polarization
D. increase the density of the electrolyte
20. The density of water is 1gcm-3. Calculate the change in volume when 90g of ice is completely melted.
A. 0cm
3
B. 9cm
3
C. 10cm
3
D. 90cm
3
21. A hygrometer is an instrument used to measure
A. Dew point
B. Temperature
C. Relative density
D. Relative humidity
22. In the diagram above, the current I is
A. 1.0A
B. 2.0A
C. 2.5A
D. 4.0A
23. Calculate the peak voltage of a mains supply of r.m.s. value of 220W
A. 311V
B. 240V
C. 222V
D. 150V
24. To obtain a maximum horizontal range for a projectile, it must be launched at angle 0 to the horizontal. The value of 0 is
A. 30
o
B. 90
o
C. 45
o
D. 60
o
25. Two points A and B are 1.0m apart. What is the least frequency that will resonate with a wire stretched between these two points, given that the speed of the wave in the wire is 200m/s?
A. 50Hz
B. 100Hz
C. 150Hz
D. 75Hz
26. If an ebonite rod is rubbed with fur, it is true that
A. The fur will acquire positive charges while the rod will acquire negative charges
B. The fur will acquire negative charges while the rod will acquire positive charges
C. Both the fur and the rod will acquire positive charges
D. Both the fur and the rod will acquire negative charges
27. Given that the decay constant of a radioactive element is 0.055s-1, its half life is
A. 18.18s
B. 12.6s
C. 0.055s
D. 0.00303s
28. A ball of mass 2kg hits a wall with a horizontal speed 10m/s and rebounds with the same speed. The impulse experience by the ball is
A. 0Ns
B. 20Ns
C. 40Ns
D. 50Ns
29. Determine the magnitude of the acceleration of an object of mass 5kg which is being acted upon by two forces each of magnitude 50N, acting perpendicularly to each other
A. 10m/s
2
B. 20m/s
2
C. 14m/s
2
D. 11m/s
2
30. Given that the radius of the earth is 6400 km and the acceleration due to gravity is 10m/s2, determine the escape velocity of an object on the surface of the earth
A. 11.3m/s
B. 1.13×10
4
m/s
C. 3.65×10
3
m/s
D. 113km/s
31. In which of the part will electric charge tend to concentrate most?
A. D
B. C
C. B
D. A
32. In the wavefront shown above, energy is transferred from A to B In 0.05s. what is the frequency of the wave?
A. 20Hz
B. 70Hz
C. 0.0143Hz
D. 90Hz
33. Anomalous behavior of water occurs
A. 0
o
C-4
o
C
B. -4
o
C-0
o
C
C. 0
o
C-25
o
C
D. 1
o
C-100
o
C
34. The pitch of a note depend on
A. Overtone
B. Amplitude
C. Frequency
D. Period
35. An erect image four times as big as the object is formed by lens of focal length 15.0cm. what is the image distance from the lens?
A. 45cm
B. 30cm
C. 11.3cm
D. 18.8cm
36. The density and weight of a body are respectively 5000kgm
-3
and 1.0N. what is the apparent weight of the body when fully immersed in water?
A. 1.0N
B. 0.2N
C. 0.8N
D. 0.08N
37. One hundred complete waves pass a given point in 5 s. Given that the distance between two consecutive crests on the wave is 11m, what is the speed of the wave?
A. 300m/s
B. 220m/s
C. 200m/s
D. 440m/s
38. Given that the speed of light is 300 million per seconds, calculate the energy released in a nuclear reaction where the mass defect is 1.0×10
-5
kg
A. 9×10
11
J
B. 3×10
3
J
C. 4.5×10
11
J
D. 33J
39. The property of waves which can be used to differentiate light wave from sound wave is
A. Reflection
B. Refraction
C. Interference
D. Polarization
40. The electromagnetic radiation with the shortest wavelength is
A. Radio wave
B. Gamma ray
C. X-ray
D. Visible light
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