The stylus of a phonograph record exerts a force of 7.7 x 10\(^{-2}\)N on a groove of radius 10\(^{-5}\)m. Compute the pressure exerted by the stylus on the groove
A2.45 x 108 Nm-2
B3.45 x 108 Nm-2
C4.90 x 108 Nm-2
D2.42 x 108 Nm-2
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Question 1332
jamb2003
Water does not drop through an open umbrella of silk materials unless the inside of the umbrella is touched. This is due to
Acapilarity
Bosmotic pressure
Cviscosity
Dsurface tension
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Question 1333
jamb2003
If an object just begins to slide on a surface inclined at 30o to the horizontal,the coefficient of friction is
A√3
B√3/2
C1/√2
D1/√3
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Question 1334
jamb2003
A hose of cross-sectional area 0.5m2 is used to discharge water from a water tanker at a velocity of 60ms-1 in 20s into a container. If the container is filled completely, the volume of the container is
A240m3
B600m 3
C2400m 3
D6000m3
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Question 1335
jamb2003
The length of piece of glass block was measured by means of a vernier calliper as shown above. The length of the glass block is
A1.63 cm
B1.64 cm
C1.65 cm
D1. 66 cm
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Question 1336
jamb2003
A test tube of radius 1.0cm is loaded to 8.8g. If is placed upright in water, find the depth to which it would sink
A2.8cm
B5.2cm
C25.5cm
D28.0cm
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Question 1337
jamb2003
On top of a spiral spring of the force constant 500Nm-1 is placed a mass of 5 x 10-3 kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the mass is projected
A8 m
B4 m
C2 m
D1 m
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Question 1338
neco2002
A converging lens of focal length 5cm forms a virtual image which is 20cm from the lens. How far from the lens is the object?
A2.0cm
B4.0 cm
C6.7cm
D20.0cm
E25.0cm
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Question 1339
neco2002
Which of the following is/are TRUE of nuclear fission?
I. A heavy nucleus is split into two nuclei of comparable masses.
II. Two light nuclei are joined together to form a heavier nucleus.
III. The total mass of the products is less than that of the reactants.
AI only
BII only
CIII only
DI and III only
EII and III only
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Question 1340
neco2002
A transformer supplies 12V when connected to a 240V mains. If the transformer takes 0.120A from the mains when used to light a 12V, 24W lamp, what is its efficiency?
A57.20%
B66.60%
C83.30%
D92.50%
E100%
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Question 1341
neco2002
Which of the following is a percussion instrument?
Abell
Bflute
Cguitar
Dpiano
Eorgan
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Question 1342
neco2002
The phenomenon of photoelectric effect is NOT used in
Aautomatic doors
Bbimetallic strip thermometers
Clight meters in cameras
Dsetting off burglar alarms
Esound production from film tracks.
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Question 1343
neco2002
The silvered walls of a vacuum flask minimise loss of heat due to
Aconduction and convection
Bconduction only
Cconvection and radiation
Dconvection only
Eradiation only
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Question 1344
neco2002
A platinum-resistance thermometer has a resistance of 10 ω at 0°C and 18 ω at 100°C. Assuming that resistance changes uniformly with temperature, what is the resistance of the thermometer when the temperature is 45°C?
A27.8
B17.8
C13.6
D6.4
E3.6
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Question 1345
neco2002
An air bubble of volume 4cm\(^3\) is formed 20m under water. What will be its volume when it rises to just below the surface of the water if the atmospheric pressure is equivalent to a height of 10m of water?
A2cm3
B4cm3
C6cm3
D8cm3
E12cm3
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Question 1346
neco2002
It is NOT possible to determine exactly and simultaneously the position and momentum of a particle. This statement is known as the
ACrompton effect
Bde Broglie’s laws
CFrank-Hertz experimental law
DHeisenberg’s uncertainly principle
Ewave-particle paradox
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Question 1347
neco2002
An a.c. generator can be converted into a d.c. generator by replacing
Athe slip rings with split-ring commutators
Bthe slip rings with armatures
Cthe split-rings with slip rings
Dthe split-rings with brushes
Ethe brushes with slip-ring commutators.
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Question 1348
neco2002
The wavelength of a stationary wave is 36.0cm. What is the distance between a node and the next anti-node?
A6.0cm
B9.0cm
C18.0cm
D360cm
E72.0cm
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Question 1349
neco2002
According to the Kinetic Theory, what does NOT occur when the temperature of a constant volume of gas is increased?
Aa decrease in the mean speed kinetic energy of the molecules
Ban increase in the mean speed of the molecules
Can increase in the momentum change at each collision.
Dan increase in the number of collisions per second
Ean increase in the pressure exerted by the gas.
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Question 1350
neco2002
A body of mass M1 moving with a velocity U collides with a stationary body of mass M2 and both move with a common velocity V. If linear momentum is conserved, which expression correctly represents V?
