A barometer can be used in determining the I. height of a mountain II. depth of a mine III. dew point. Which of the following is/are correct?
AI, II and III
BII and III only
CI and III only
DI and II only
EIII only
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Question 1902
waec1992
A force of 20 N applied parallel to the surface of a horizontal table, is just sufficient to make a block of mass 4kg move on the table. Calculate the coefficient of friction between the block and the table. (g = 10ms2)
A0.05
B0.20
C0.50
D0.80
E2.00
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Question 1903
waec1992
Which of the following will reduce the frequency of oscillation of a simple pendulum?
AIncreasing the mass of the bob
BDecreasing the mass of the bob
CIncreasing the length of the string
DDecreasing the length of the string
EIncreasing the amplitude of oscillation
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Question 1904
waec1992
Solid weighs 0.040 N in air and 0.024 N when fully immersed in a liquid of density 800 kg m-3. What is the volume of the solid? (g = 1Oms2)
A2.0 x 10-6m3
B2.5x10-6m3
C3.0x10-6m3
D2.0x 10-5m3
E3.0 x 10-5m3
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Question 1905
waec1992
Which of the following has the same unit as the moment of a force?
AForce
BPower
CWork
DMomentum
EImpulse
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Question 1906
waec1992
A body accelerates uniformly from rest at the rate of 3 m/s\(^2\) for 8 seconds. Calculate the distance covered by the body during the acceleration?
A12m
B24m
C48m
D72m
E96m
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Question 1907
waec1992
Which of the following statements about solid friction is/are correct? I. Friction depends on the nature of the surfaces in contact II. Friction depends on the area of contact III. Friction always acts in the direction of motion.
AI only
BII only
CIII only
DI and II only
EI,II and III
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Question 1908
waec1992
What change in velocity would be produced on a body of mass 4kg if a constant force of 16 N acts on it for2 s?
A0.5 ms-1
B2.0ms-1
C8.0 ms-1
D32.0 ms-1
E128.0 ms-1
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Question 1909
waec1992
The diagram above represents the trajectory of a projectile with an initial velocity U. Calculate the time taken to reach the maximum height. (Take g as acceleration due to gravity)
AUsinθ/2g
B2Usinθ/g
CUcosθ/g
D2Ucosθ/g
EUsinθ/g
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Question 1910
waec1992
Which of the following is a scalar quantity?
AMomentum
BAcceleration
CDisplacement
DDistance
EForce
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Question 1911
jamb1992
PQRS is rectangular cell with PQ perpendicular to the magnetic field as shown above. If a current flows in the the direction PQRS in what direction will the coil move
AUpwards
BDownwards
CTOwards The North Pole
DTowards The South Pole
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Question 1912
jamb1992
A capacitor of 10µF is connected across a cell of 12 volts as shown above, calculate the energy stored in the capacitor
A7.2 x 10-4J
B1.4 x 10-3J
C1.4 x 10-3J
D1.2 x 10-2J
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Question 1913
jamb1992
The circuit diagram above contains four ammeters W, X, Y and Z, Which of the following statements about the ammeter readings is correct
AThe reading of W is equal to that of Y and twice that of X
BThe reading of Y is greater than that of Z
CThe readings of W and Y are equal and each is greater than that of X
DThe reading of Z is equal to the sum of the readings of Y and W
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Question 1914
jamb1992
The diagram above shows a meter bridge in which two of thee arms contain resistances R and 2Ω. A balance point is obtained at 60cm from the left end , calculate the value of R
A1.2Ω
B1.3Ω
C3.0Ω
D6.0Ω
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Question 1915
jamb1992
The diagram above represents the field pattern obtained by bringing the poles of two magnets together.The poles must be
AS-S poles
BS-N poles
CN-S poles
DN-N poles
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Question 1916
jamb1992
The fig above shows the heights of two liquids X and Y when some air is sucked out of the apparatus through the pump P. The diameter of the table in X is twice That of the Tube In Y. What is the relative density of the liquid X with respect to liquid Y
A1/3
B2/3
C3
D6
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Question 1917
jamb1992
In the diagram above, the hanging mass \(m_2\) is adjusted until \(m_1\) is on the verge of sliding. The coefficient of static friction between the mass \(m_1\) and the table is
Am1/m2
Bm1g/m2
Cm2/m1
Dm2g/m1
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Question 1918
jamb1992
A uniform light rod is kept in horizontal equilibrium under the influence of fore forces as shown above, which of the following equations correctly represents the condition of equilibrium for the rod
AF1 + F2 = F3 + F4
BF1 + F2 - F3 + F = 0
C(F1 + F2)ab = (F3 + F4)cd
DF1a + F2b - F3c - F4d = 0
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Question 1919
jamb1992
\(^{27}_{13}Al\) + \(^{1}_{0}n\) \(\Rightarrow\) \(^{24}_{11}Na\) + X
Aa proton
Ba gamma ray
Ca helium particle
Dan alpha particle
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Question 1920
jamb1992
After three half lifes, the fraction of a radioactive material that has decayed is
