JAMB UTME - Physics - 2018
Question 1 Report
Calculate the effective capacitance of the circuit in the diagram given
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2uf+2uf+2uf=6uf
So u have three capacitors in series
6uf 2uf and 3uf
They are in series so
1/C= 1/6+1/3=1/2
C=2uf
Then the same thing with the last two capay
1/2+1/2=1uf
Thanks
Question 2 Report
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Question 3 Report
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But in the case of bigger drops of mercury, the potential energy due to gravity is predominant over the potential energy due to surface tension.Consequently, to keep equilibrium , the mercury drop tends to assume minimum potential energy as possible, the drop becomes oval in shape and lower center of gravity.
Question 4 Report
A ball of mass 5.0kg hits a smooth vertical wall normally with a speed of \(2\text{ms}^{-1}\). Determine the magnitude of the resulting impulse
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Question 7 Report
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Question 8 Report
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Question 9 Report
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Question 10 Report
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Question 11 Report
For what values of F and ? will the forces shown in the diagram below be in equilibrium.
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Resolve horizontally, f = 40sin? = 40sin60o
= 40(?32 )
= 20?3 N
Question 12 Report
In the diagram shown, If the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be
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Question 13 Report
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Question 14 Report
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MA = E × Vr/100
Vr in a pulley system is the number of pulleys and in this case we have 5 (3 and 2)
So
MA = 72 × 5 = 360/100 = 3.6
Thanks
Question 15 Report
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Question 16 Report
A man walks 1km due east and then 1 km due north. His displacement is
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Question 17 Report
In the diagram given if the atmospheric pressure is 760mm, the pressure in the chamber G Is
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Question 19 Report
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Question 20 Report
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Question 21 Report
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Shell?s law:. 7 = Sin20Sinr0
Vg = Sin300Sinr0
Sinr0 = 3Sin3004
Sin r0 = 0.375
R o = Sin-1 (0.375)
R o = 22.02 o
R o = 22 o
Question 22 Report
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Question 23 Report
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Question 24 Report
Which of the following diagrams represents correctly an n-p-n transistor?
i.
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Question 25 Report
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Question 26 Report
Which of the following statements are TRUE of isotopes?
I. Isotopes of an element have the same chemical properties because they have the same number of electrons
II. Isotopes of elements are normally separated using physical properties
III. Isotopes of an element have the same number of protons in their nuclei
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Question 27 Report
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Convection: heat transfer due to bulk movement of molecules within fluids
Expansion: the action of becoming larger or more extensive
Question 28 Report
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Question 29 Report
A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 3.40ms\(^{-1}\), how far is he from the hill?
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Question 30 Report
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Question 31 Report
The diagram shown represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. If the efficiency of the machine is 40, then the value of W is?
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In a block-and-tackle pulley system, the velocity ratio is equal to n.
Efficiency = MAVR×100%
MA=LE,VR=n
Efficiency = LE×1n×100%
E=LEff.×n×100%
E=120N40%×6×100%
E=50N
Question 32 Report
A lens of focal length 15cm forms on erect image which is three times the size of the object. The distance between the object and the image is ___.
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Question 33 Report
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Question 34 Report
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= E3E2
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Question 36 Report
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Question 37 Report
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Question 38 Report
A force of 5N acts at a point Y on a rod XYZ as shown in this diagram. If XYZ is 2m, what is the moment of the force about point X?
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Question 39 Report
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Question 40 Report
