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Physics Past Questions

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

51 questions
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Question 1 of 11 51 total questions
Question 21
waec 2004
A machine of velocity ratio 5 is used in lifting a load with an effort of 500N. If the machine is 80% efficient. Determine the magnitude of load
A2500N
B2000N
C900N
D625N
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Question 22
waec 2004
An elastic string of force constant 200N m-1 is stretched through 0.8m within its elastic limit. Calculate the energy stored in the string
A64.0J
B80.0J
C128.0J
D160.0J
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Question 23
waec 2004

On which of the following factor does the viscosity of a liquid depend? i. Nature of the liquid. ii. Temperature of the liquid. iii. Area of the liquid surface

Ai and ii only
Bii and iii only
Ci and iii only
Di, ii and iii
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Question 24
waec 2004
A steel needle floating on water, sinks when kerosine is added to the water. This is because the kerosine
Aincreased the surface tension of the water
Breduces the density of the water
Creduces the surface tension of the water
Dreduces the upthrust on the needle
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Question 25
waec 2004
A diver is 5.2m below the surface of water of density 1000Kgm-3. If the atmospheric pressure is 1.02 x 105pa. Calculate the pressure on the diver [g = 10ms-2]
A6.20 x 104 pa
B1.02 x 105 pa
C1.54 x 105 pa
D5.20 x 105 pa
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Question 26
waec 2004
Which of the following concept is not an evidence of the particle nature of matter?
Adiffusion
Bbrownian motion
Cdiffraction
Dcrystallization
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Question 27
waec 2004
The diagram above represent displacement D, versus time, t graph of a progressive wave. Deduce the frequency of the wave
A20 Hz
B10 Hz
C5 Hz
D4 Hz
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Question 28
waec 2004
Calculate the change in volume when 90g of ice is completely melted. [density of water = 1g cm-3, density of ice = 0.9cm-3]
A0.00cm3
B9.00cm3
C10.00cm3
D90.00cm3
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Question 29
waec 2004
An object weighs 60.0N in air, 48.2N in a certain liquid X, and 44.9N in water, Calculate the relative density of X
A3.300
B1.279
C0.932
D0.782
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Question 30
waec 2004
Which of the following statements about the mass and the weight of a body is not correct? its
Amass is a scalar quantity
Bweight is a function of the gravitational pull on it
Cmass on earth and on the moon is the same
Dweigh at the equatior and at the poles is the same
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Question 31
waec 2004
The molecular structure of a liquid is such that
Athe molecules have unlimited freedom of movement
Bmolecular movement is restricted to vibration only
Cintermolecular collisions take place
Dall molecules moves move with the same speed
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