Which of the following will reduce the frequency of oscillation of a simple pendulum?
ADecreasing the length of the string
BIncreasing the amplitude of oscillation
CIncreasing the length of the string
DIncreasing the mass of the bob
EReducing the mass of the bob.
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Question 32
neco2005
Which of the following statements is correct?
AAlpha particles have a large mass and high penetrating power
BAlpha particles have a small mass and a low penetrating power
CBeta partials have no mass and a high penetrating power
DBeta particles have a large mass and a low penetrating power
EGamma rays have no mass and a high penetrating power
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Question 33
neco2005
The charge of an alpha particle can be neutralized by
A1 beta particle
B2 photons of gamma rays
C2 beta particles
D4 beta particles
E4 photons of gamma rays
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Question 34
neco2005
Which of the following is used for shielding radioactive fallout?
AAluminum
BLead
CIron
DPlastic
EWood
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Question 35
neco2005
Which of the following is a percussion Instrument?
AFlute
BGuitar
CPiano
DTrumpet
EXylophone
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Question 36
neco2005
Which of the following statements is/are correct in any machine?
I. The velocity ratio is usually greater than the mechanical advantage.
II. Efficiency work inputwork outputIII. The velocity ratio is independent of friction.
AI only
BIII only
CI and II only
DI and III only
EII and III only
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Question 37
neco2005
An object of mass 5.0 cg moving with a velocity of 12ms-1 due north hits a stationary body of mass 7.0kg. If they stick together after collision and move with velocity V due north, calculate the magnitude of V.
A12ms-1
B7ms-1
C6ms-1
D5ms-1
E4ms-1
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Question 38
neco2005
Which of the following is NOT a component of an a.c. generator?
AArmature
BCarbon brushes
CMagnet
DSlip ring
ESplit rings
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Question 39
neco2005
Which of the following is a non-renewable energy source?
ACoal
BHydro
COcean waves
DSolar
ETides
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Question 40
neco2005
The escape velocity of an object from the gravitational field of a planet
I. Increases with the mass of the object
II. Increases with the mass of the planet
III. Is smaller on the moon than on the earth. Which of the above statements is/are correct?
AI only
BII only
CI and II only
DII and III only
EI, II and III
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Question 41
neco2005
The mercury column in a simple mercury barometer is of height 5m above the mercury in a reservoir. If the tube is replaced with one whose radius is twice that of the first tube, what will be the height of the mercury column in the new tube?
A2.5m
B5.0m
C7.5m
D10.0m
E20.0m
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Question 42
neco2005
Calculate the peak voltage that could be obtained from a 220 V\(_{r.m.s}\)main supply.
A70.7V
B110.0V
C155.6V
D311.1V
E440.0V
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Question 43
neco2005
Which of the following pairs is an example of translucent bodies?
ACardboard and moon
BClear water and glass
CFrosted glass and waxed paper
DOiled paper and brick
EWood and metal sheet
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Question 44
neco2005
The length of a simple pendulum is increased by a factor of four. By what factor is its period Increased?
A0.25
B0.5
C1.66
D2
E4
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Question 45
neco2005
When some ice cubes are added to a glass of warm water, the glass is cooled by a process of
Aconduction only
Bconvection only
Cconduction and convection
Dconduction and radiation
Eradiation only
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Question 46
neco2005
Mercury does NOT wet glass because
Aglass is an amorphous substance
Bthe adhesive force is greater than the cohesive force
Cthe cohesive force is greater than the adhesive force.
Dmercury has very high thermal conductivity
Emercury is opaque.
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Question 47
neco2005
When a yellow card is viewed in blue light, It will appear
Ablack
Borange
Cpurple
Dred
Ewhite
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Question 48
neco2005
Two metals A and B lose the same quantity of heat when their temperatures drop from 20°C to 15°C. If the specific heat Capacity of A Ii thrice that of B, calculate the ratio of the mass of A to that of B.
A3:01
B4:03
C3:04
D1:02
E1:03
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Question 49
neco2005
A voltage of 240V is connected to the primary coil of a transformer, the rating of the primary turns to the secondary turns if the voltage available at the secondary coil is 15V
A0.06
B0.9
C1.6
D16
E36
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Question 50
neco2005
Calculate the magnitude of the force due to a magnetic field of 0.40T on an electron moving perpendicular to the field with a speed of 4.00 × 106ms-1 (e 1.60 × 10-19C]
