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Physics Past Questions

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322 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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322 questions
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Question 1 of 20 322 total questions
Question 11
neco 2009
An immersion heater is rated 1500W. How long does it take the heater to raise the temperature of 1 kg of water by 30°C? (Assume heat lost to the surrounding is negligible, Specific heat capacity of water 4200Jkg-1K-1)
A84s
B112s
C130s
D168s
E280s
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Question 12
neco 2009
A transformer has an efficiency of 92.5%. the ratio number of turns in the primary coil to that in the secondary coil is 128 : 45. If the current passing through the secondary coil is 9.0A, calculate the current passing through the primary-coil.
A2.93A
B3.16A
C3.42A
D25.60A
E27.68A
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Question 13
neco 2009
Which of the following statements is correct about volatile liquids? They have
Alow boiling point
BLow evaporating rate
Chigh conductivity
Dhigh density
Ehigh viscosity
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Question 14
neco 2009

The work done in extending a spring by 40 mm is 1.52J. Calculate the elastic constant of the spring.

A38.8 Nm-1
B60.8 Nm-1
C190.0 Nm-1
D1900.0 Nm-1
E3800.0 Nm-1
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Question 15
neco 2009

The electric potential at a distance d from a point charge q in air of permittivity eo is expressed as?

Aq2 ÷ 4πeod
Bq2 ÷ 4πeo
Cq ÷ 4πeod2
Dq ÷ 4πeod
Eq ÷ 4πeo2d
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Question 16
neco 2009
Two images Y and X are formed by a plane mirror and a convex mirror respectively. Which of the following is correct about their characteristics?
ABoth are inverted
BThe magnification of Y is greater than one while that of X is one
CThe magnification of Y is one while that of X is less than one
DY is inverted while X is erect
EY is real while X is virtual.
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Question 17
neco 2009
In the electrical method of making a magnet, the polar the magnet formed depends on the
Aamount of current passed
Bdirection of the current
Cnature of the material used
Dorientation of the magnetic material in space
Esize of the magnetic material
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Question 18
neco 2009
An object of mass 2kg moves for 5s with a uniform velocity of 10ms. What is the magnitude of its acceleration in ms-2
?
Azero
B2.5
C10
D12.5
E100
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Question 19
neco 2009

A ball of mass 0.1kg moving with a velocity of 20ms-1 is hit by a force which acts on it for 0.02s. If the ball moves off in the opposite direction with a velocity of 25ms-1 , calculate the magnitude of the force.

A25N
B125N
C225N
D
E100N
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Question 20
neco 2009
The term torque means
Athe equilibrant of two concurrent forces
Bthe moment of a force about an ads
Cthe resultant of several forces acting on a body in equilibrium
Dtwo coplanar forces at right angle to each other
Etwo equal and opposite forces whose lines of action do not coincide
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Question 21
neco 2009
Inertia is the property of a body which makes the body to
Aaccelerate
Bbe reluctant to move when at rest
Cexperience friction when moving
Dmove randomly
Eretard
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Question 22
neco 2009

A projectile attains its maximum height when the angle of projection is?

A30°
B45°
C60°
D75°
E90°
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Question 23
neco 2009
A stone is thrown with a speed of 10ms at an angle of 30° to the horizontal, Calculate its time of flight, (g = 10ms2)
A0.5s
B1.0s
C1.7s
D2.0s
E3.4s
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Question 24
neco 2009

A plane progressive wave is represented by the equation y = 0.2sin (200πt - 0.5.x) where x and y are measured in cm and t in s. What is the frequency of the wave?

A0.5Hz
B4.0Hz
C10.0Hz
D100.0Hz
E200.0Hz
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Question 25
neco 2009

Which of the following phenomena is responsible for the spherical shape of soap bubbles?

AAdhesion
BCapillarity
CCohesion
DOsmosis
ESurface tension
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Question 26
neco 2009
Which of the following pairs of phenomena helps in the resolution of the wave-particle paradox of matter?
ACompton effect and thermionic emission
BElectron diffraction and refraction
Cemission and absorption of light
DInterference and polarization
EReflection and photoelectric effect
View Explanation & Discuss
Question 27
neco 2009
The defect of the eye lens which occurs as a result of weak ciliary muscles is called
Aastigmatism
Bhypermetropia
Cmyopia
Dpresbyopia
Espherical aberration
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Question 28
neco 2009
Two forces of magnitude 8N and 4N act at right angle to each other. The angle between the resultant and the 8N force is
A23.9°
B26.6°
C29.5°
D60.0°
E63.4°
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Question 29
neco 2009

A ball of mass 100g falls from a height of 5m onto a concrete floor and rebounds to a height of 3m. Calculate the energy lost. (g = 10ms-2)

A2J
B20J
C100J
D1000J
E2000J
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Question 30
neco 2009
In which of the following fields is repulsion NOT experienced?
AElectrical only
BGravitational only
CMagnetic only
DMagnetic and electrical
EMagnetic and gravitational
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