Physics Past Questions

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45 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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Past Questions

45 questions
Question 1 of 20 45 total questions
Question 11
waec 2001
An object is placed 20cm from a lens. If an image is formed on a screen 260cm away from the lens, calculate the magnification of the image
A28
B26
C24
D13
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Question 12
waec 2001

Convex spherical mirrors are preferred to plane mirrors as driving mirrors because

Athe image produce is upright and clearly visible
Bit provides a wider field of view
Cthe image produce is errect and diminished
Dthe image produced is not laterally inverted
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Question 13
waec 2001

An incident ray is reflected normally by a plane mirror onto a screen where it forms a bright spot. The mirror and screen are parallel and 1m apart. If the mirror is rotated through 5º, calculate the displacement of the spot

A8.7cm
B10.0cm
C15.4cm
D17.6cm
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Question 14
waec 2001
Surface waves travelling in deep water at 15ms-1 are incident at a shallow water boundary. If the angles of incidence and refraction are 45o and 30o respectively. Calculate the speed of the waves in shallow water
A8.1ms-1
B10.0ms-1
C10.6ms-1
D22.5ms-1
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Question 15
waec 2001

Humidity is used to describe the amount of

Aair in water vapour
Bcloud available in the atmosphere
Cair in equal volume of cloud
Dwater vapour in the amosphere
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Question 16
waec 2001

Which of the following physical qualities affects the saturated vapour pressure of a liquid ?

Atemperature
Bvolume
Cmass
Ddensity
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Question 17
waec 2001

The amount of heat given out or absorbed when a substance changes its state at a constant temperature is known as

Alatent heat
Bheat capacity
Cspecific latent heat
Dspecific heat capacity
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Question 18
waec 2001

The volume of an ideal gas at a pressure of 77 cmHg and a temperature of 60 °C is 240 cm\(^3\). If the temperature and pressure are increased to 98oC
and 81cmHg respectively, calculate the new volume of the gas

A411.5cm3
B267.1cm3
C254.2cm3
D112.7cm3
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Question 19
waec 2001

A given mass of an ideal gas has a pressure of 500Nm-2 at -13ºC. If its volume remains constant. Calculate its pressure at 247ºC.

A25Nm-2
B50Nm-2
C500Nm-2
D1000Nm-2
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Question 20
waec 2001
A resistance thermometer has a resistance of 20\(\Omega\) at 0oC and 85\(\Omega\) at 100oC. If its resistance is 52\(\Omega\)in a medium, calculate the corresponding temperature
A49.2oC
B60.6oC
C80.0oC
D84.7oC
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Question 21
waec 2001
a beam PQ pivoted at P carries a load of 80N as shown above. Calculate the effort E, required to keep it horizontal. [neglect the weight of the beam]
A32.0N
B26.7N
C16.0N
D13.3N
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Question 22
waec 2001
A screw jack with a Tommy bar of length 12cm is used to raise a car through a vertical height of 25cm by turning the Tommy bar through 50 revolutions. Calculate the approximate velocity ratio of the jack [\(\pi = 3.142\)]
A21
B38
C48
D151
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Question 23
waec 2001
A simple machine with an efficiency of 75% lifts a load of 5000N when a force of 500N is applied to it. Calculate the velocity ratio of the machine
A10.0
B13.3
C17.5
D25.0
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Question 24
waec 2001

Electrical resistance is a property of an electrical energy to be converted into

Amechanical energy
Bheat energy
Cmagnetic energy
Dchemical energy
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Question 25
waec 2001

Which of the following statements about elastic collision is correct?

Amomentum is lost due to the sound produced
Bloss of momentim is equal to loss in kinetic energy
Cboth kinetic energy and momentum are conserved
Dkinetic energy is lost while momentum is conserved
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Question 26
waec 2001

The time rate of change of momentum is

Aimpulse
Bforce
Cpower
Dpressure
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Question 27
waec 2001
The amplitude of a particle executing simple harmonic motion in 5cm while its angular frequency is 10 rad s-1. calculate the magnitude of the maximum acceleration of the particle
A0.25ms-2
B0.50ms-2
C2.00ms-2
D5.00ms-2
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Question 28
waec 2001

The amplitude of the motion of a body performing simple harmonic motion decreases with time because

Afriction force dissipate the energy of motion
Bthe frequency of oscillation varies with time
Cthe period of oscillation varies with time
Denergy is supplied by some external agency
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Question 29
waec 2001

Which of the following equations represents the distance x, travelled by a body moving on a straight road with a constant speed? [The other symbol have their usual meanings]

Ax = Ut + \(\frac{1}{2}t^2\)
Bx = Ut
Cx = \(\frac{V^2 - U^2}{2a}\)
Dx = -\(\frac{1}{2} at^2\)
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Question 30
waec 2001

A block weighing 15N rests on a flat surface and a horizontal force of 3N is exerted on it. Determine the friction force on the block

A0.3N
B0.5N
C3.0N
D5.0N
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