A surface in the path of an advancing wave on which all the particles are in the same state of disturbance is called a
Acrest
Bcycle
Cpulse
Dtrough
Ewave front
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Question 1202
neco2004
A note, A from a guitar produces a wave of amplitude 4 mm and frequency 1000 Hz. Another note, B from a whistle produces a similar waveform of amplitude 2 mm and frequency 2200 Hz. If the two notes are compared,
AA has a higher pitch than B
BA is louder than B.
CB has a greater speed than A
DB is louder than A
EA and B have the same quality
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Question 1203
neco2004
Which property of a fluid determines its suitability as a lubricant?
ACapillarity
BDiffusion
CSolubility
DSurface tension
EViscosity
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Question 1204
neco2004
For total internal reflection to occur,
I. light must be travelling from an optically more dense to an optically less dense medium.
II. the angle of incidence in the denser medium must be greater than its critical angle.
III. the angle of refraction in the less dense medium must be equal to 90 °. Which of the statements above is/are correct?
AI only
BII only
CIII only
DI and II only
EII and III only.
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Question 1205
neco2004
A projectile fired with initial velocity, u will attain its maximum height H when the angle of projection θ is
A30°
B45°
C60°
D75°
E90°
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Question 1206
neco2004
Which to the following is NOT a fundamental unit?
AAmpere
BKelvin
CKilogramme
DNewton
ESecond
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Question 1207
neco2004
An electron makes a transition from - 1.60 eV energy level to - 10.4eV energy level Calculate the energy loss due to the transition.
A16.64eV
B12.00eV
C10.40eV
D8.80eV
E6.50eV
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Question 1208
neco2004
When very hot water is poured into a thin-walled glass container, it is less likely to break because
Aall parts of the container got heated-uniformly
Bglass can withstand a very high temperature
Cthe molecules of glass are too far apart to cause breakages of the container
Dthe outer part of the container is cooler than the inner part
Ethin glass does not expand fast
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Question 1209
neco2004
The frequency of a body executing simple harmonic motion when left undisturbed is known as__________ frequency.
Adamped
Bforced
Cfree
Dnatural
Esinusoidal
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Question 1210
neco2004
Which of the following statements is true of nuclear fission?
AHeavy nuclei combine to form new element
BProtons are used in bombarding heavy nucleus
CThe sum of the masses of the products is greater than the mass of the original substance
DTwo light nuclei are made to combine to form a heavy nucleus
EVery large amount of energy is released.
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Question 1211
neco2004
The temperature at which the water vapour present in the air is just enough to saturate the air is the _______ point.
Aboiling
Bcritical
Cdew
Dice
Esteam
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Question 1212
neco2004
Calculate the magnitude of the electric field intensity in a vacuum at a distance of 25cm from a charge of 5 × 10-3C. Take (\(\frac{1}{4πε0} = 9\times10^9Nm^2C^{-2}\))
A7.2 × 108NC-1
B1.8 × 108NC-1
C5.6 × 108NC-1
D3.6 × 108NC-1
E1.5 × 106NC-1
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Question 1213
neco2004
The time t1, t2 and t3 for 20 complete oscillations of a simple pendulum experiment are 32.0s, 34.6s and 35.5s respectively. Calculate the mean period of the pendulum.
A1.60s
B1.70s
C1.73s
D1.78s
E5.11s
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Question 1214
neco2004
Which of the following is NOT an example of a percussion instrument?
ABell
BDrum
CFlute
DGong
EXylophone
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Question 1215
neco2004
A mass of 5kg is suspended from the ceiling of a lift with a light inextensible string. As the lift moves upwards with an acceleration of 2ms-2, the tension in the string is [g = 10ms-2]
A25N
B40N
C50N
D60N
E70N
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Question 1216
neco2004
A plane which is Inclined at an angle of 30 ° to the horizontal has a velocity ratio of
A2
B1
C0.87
D0.67
E0.5
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Question 1217
neco2004
The component of a vector in a given direction is
Aequal to the magnitude of the resultant vector in that direction
Bequal to the magnitude of the resultant vector in the opposite direction
Cits effective magnitude
Dits effective value in that direction
Eits effective value in the opposite direction
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Question 1218
neco2004
In which of these fields are repulsive forces NOT experienced?
I. Magnetic field
II. Gravitational field
III. Electric field
AI only
BII only
CIII only
DI and III only
EII and III only
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Question 1219
neco2004
A force F is applied to a body P as shown in the diagram above. If the body moves through a distance, a, which of the following represents the work done?
AFa
BFa Cos θ
C\(\frac{Fa}{\cos \theta}\)
DFaSin θ
E\(\frac{Fa}{\sin \theta}\)
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Question 1220
neco2004
A body of mass 40g loses 80J of heat energy. If the specific heat capacity of the body is 400 Jkg-1, calculate the change in temperature of the body.
