Leaderboard: PHYSICS JAMB CBT
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PHYSICS JAMB CBT
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PHYSICS JAMB CBT
1-50 QUESTIONS
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Question 1 of 39
1. Question
What is the least possible error encountered
when taking measurement with a meter rule?Please like our facebook page here
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Incorrect
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Question 2 of 39
2. Question
A quantity which requires magnitude and
direction to be specified isPlease like our facebook page here
Correct
Incorrect
Hint
Displacement is a vector quantity
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Question 3 of 39
3. Question
I Electrical potential, II Torque, III Kinetic
Energy, IV Momentum. Which of the quantities
listed are vectors?Please like our facebook page here
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Question 4 of 39
4. Question
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Question 5 of 39
5. Question
A car accelerates uniformly from rest at 3ms-2
.
its velocity after traveling a distance of 24m isPlease like our facebook page here
Correct
Incorrect
Hint
V2= U2x 2ax
V2= 0 x 2(3)(24)
V2= 144
V =square root of 144
V = 12ms-1 -
Question 6 of 39
6. Question
Calculate the escape velocity of a satellite
launched from the earth’s surface if the radius of the
earth is 6.4x106mPlease like our facebook page here
Correct
Incorrect
Hint
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Question 7 of 39
7. Question
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 isPlease like our facebook page here
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Incorrect
-
Question 8 of 39
8. Question
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 isPlease like our facebook page here
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Incorrect
-
Question 9 of 39
9. Question
What happens when three coplanar non-parallel
forces are in equilibrium?Please like our facebook page here
Correct
Incorrect
Hint
Conditions for non-parallel coplanar forces
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Question 10 of 39
10. Question
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 isPlease like our facebook page here
Correct
Incorrect
Hint
Kinetic Energy = mgh
= 20 x 10 x 10 J
= 2000J -
Question 11 of 39
11. Question
The energy in the nucleus of atoms produce heat
which can be used to generatePlease like our facebook page here
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Question 12 of 39
12. Question
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.Correct
Incorrect
-
Question 13 of 39
13. Question
A force of 500N1
is applied to a steel wire of
cross-sectional area 0.2m2
, The tensile stress isCorrect
Incorrect
-
Question 14 of 39
14. Question
The small droplets of water that form on the
grass in the early hours of the morning isCorrect
Incorrect
-
Question 15 of 39
15. Question
What is the equivalent of 20K in Celsius scale?
Correct
Incorrect
Hint
273 + 20 = 293
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Question 16 of 39
16. Question
The equation PaVbT
c= constant reduces to
Charles Law ifCorrect
Incorrect
Hint
if a=0, b=1 and c=-1 then
P0V1T-1 = V/T (Charles Law) -
Question 17 of 39
17. Question
The quantity of heat needed to raise the
temperature of a body by 1K is the body’sCorrect
Incorrect
-
Question 18 of 39
18. Question
The melting point of a substance is equivalent to
itsCorrect
Incorrect
-
Question 19 of 39
19. Question
The temperature at which the water vapour
present in the air is just sufficient to saturate air isPlease like our facebook page here
Correct
Incorrect
-
Question 20 of 39
20. Question
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-
Question 21 of 39
21. Question
The distance between two successive crests of a
wave is 15cm and the velocity 300ms-1
. Calculate the
frequency.Please like our facebook page here
Correct
Incorrect
Hint
Wavelength = 15cm = 0.15m
Velocity = 300m/s
V = fx
F = V/Wavelength
F = 300/0.15 Hertz
F = 2 x 10^3Hz -
Question 22 of 39
22. Question
A boy receives the echo of his clap reflected by a
nearby hill 0.8s later. How far is he from the hill?Correct
Incorrect
Hint
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 -
Question 23 of 39
23. Question
An object is placed 10m from a pinhole camera
of length 25cm. Calculate the linear magnification.Please like our facebook page here
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Incorrect
Hint
Linear Magnification =
Length of Camera/Distance of the ObjectLinear Magnification =
25/1000Linear Magnification = 2.5 × 10^−2
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Question 24 of 39
24. Question
The focal length of a concave mirror is 2.0cm. If
an object is placed 8.0cm from it, the image is atCorrect
Incorrect
Hint
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Question 25 of 39
25. Question
In a compound microscope, the objective and the
eye piece focal lengths areCorrect
Incorrect
-
Question 26 of 39
26. Question
When a telescope is in normal use, the final
image is atCorrect
Incorrect
-
Question 27 of 39
27. Question
When a negatively charged rod is brought near
the cap of a charged gold leaf electroscope which has
positive charges, the leafCorrect
Incorrect
-
Question 28 of 39
28. Question
What charge is stored in a 0.1F capacitor when a
10V supply is connected across it?Correct
Incorrect
Hint
Q = CV = 0.1 x 10 = 1C
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Question 29 of 39
29. Question
The maximum power transfer occur in a cell
when the external resistance isCorrect
Incorrect
-
Question 30 of 39
30. Question
If a metal wire 4m long and cross-sectional area
0.8 mm^2
has a resistance of 60, find the resistivity of
the wireCorrect
Incorrect
-
Question 31 of 39
31. Question
A circuit has a resistance of 200Ω. The
resistance of the circuit can be reduced to 120Ω whenPlease like our facebook page here
Correct
Incorrect
Hint
For parallel resistance
300×200/500
= 120Ω
Therefore it is when a 300Ω resistor is connected to it
in parallel -
Question 32 of 39
32. Question
PHCN measures its electrical energy in
Correct
Incorrect
-
Question 33 of 39
33. Question
What is the best method of demagnetizing a steel
bar magnet?Please like our facebook page here
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-
Question 34 of 39
34. Question
The magnitude of the angle of dip at the equator
isCorrect
Incorrect
-
Question 35 of 39
35. Question
When an atom undergoes a beta decay, the
atomic number of the nucleusCorrect
Incorrect
-
Question 36 of 39
36. Question
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
]Correct
Incorrect
Hint
Mass = ZIT kg
Mass = 3.3 x 10-7
x 4 x 2 x 60 x 60 kg
Mass = 9.5 x 10^-3kg -
Question 37 of 39
37. Question
Which gas produces a pink coloured light in a
discharge tube?Correct
Incorrect
-
Question 38 of 39
38. Question
In a common emitter configuration, the output
voltage is through theCorrect
Incorrect
-
Question 39 of 39
39. Question
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
50^oC isCorrect
Incorrect