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Physics Past Questions

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4,719 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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4,719 questions

Question 1 of 20 4,719 total questions

Question 1441

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 1442

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 45^o and 30^o 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 1443

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 1444

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 1445

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 1446

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 1447

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 1448

waec 2001

A resistance thermometer has a resistance of 20\(\Omega\) at 0^oC and 85\(\Omega\) at 100^oC. If its resistance is 52\(\Omega\)in a medium, calculate the corresponding temperature

A49.2^oC

B60.6^oC

C80.0^oC

D84.7^oC

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Question 1449

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 1450

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 1451

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 1452

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 1453

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 1454

waec 2001

The time rate of change of momentum is

Aimpulse

Bforce

Cpower

Dpressure

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Question 1455

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 1456

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 1457

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 1458

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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Question 1459

waec 2001

The apparent weight of a body fully immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. [Density of water = 1000kgm^-3, g = 10ms^-2]

A8.9 x 10^-3m³

B6.4 x 10^-3m³

C3.2 x 10^-3m³

D3.0 x 10^-3m³

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Question 1460

waec 2001

Which of the following statements about pressure is not correct? pressure

Aincreases with an increase in surface area

Bdecreases with an increase in surface area

Cincreases with a decrease in surface area

Dincreases with an increase in the applied force

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