Physics Past Questions

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

48 questions
Question 1 of 20 48 total questions
Question 11
jamb 1980

In a compound microscope

Athere is only one lens
Bthe objective lens have a shorter focal length than the eyepiece which is convex
Cthe objective lens has a longer focal length than the eyepiece which is convex
Dthe objective lens has a shorter focal length than the eyepiece which is concave
Ethe objective and the eyepiece are both convex and have the same focal length
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Question 12
jamb 1980

Which of the following statements about sound is NOT true?

Asound is a longitudinal wave
Bsound can be reflected and refracted like light
Csound travels through a vacuum
Dsound moves faster in a steel wire than in air
Esound can ony be produced by vibrating objects
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Question 13
jamb 1980

If the volume of a fixed mass of a gas is kept constant, the pressure of the gas

Ais inversely proprotional to its centigrade temperature
Bis inversely proportional to its absolute temperature
Cis directly proportional to its centigrade temperature
Dis directly proportional to its absolute temperature
Eremains constant also
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Question 14
jamb 1980
Heat is supplied to a block of ice 0o until half of it has melted. Which of the following statements is true?
Athe temperature rises and the ice exoands
Bthe temperature remains constant and the volume of ice decreases
Cthe ice gives out heat as it melts
Dthe mass remains constant and the temperature increases
Ethe mass decreases because some heat is lost to the atmosphere
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Question 15
jamb 1980
The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9, 19.3, 10.5. A metal ornament which weighs 0.425kg and can displace 50 x 10-6m3m of water is made of
Azinc
Bbrass
Ccopper
Dgold
Esilver
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Question 16
jamb 1980
An object of mass m and volume v, is totally immersed in a liquid of density p. The tension of a string holding it is
Amg
B(m + pv)g
C(m - pv)g
Dpvg
E[M/m-pv]g
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Question 17
jamb 1980

A milliameter of resistance 5\(\Omega\) and full scale deflection of 50m A is to used to measure a potential difference of 50 V. The resistance of the multiplier should be

A95\(\Omega\)
B110\(\Omega\)
C595\(\Omega\)
D995\(\Omega\)
E1005\(\Omega\)
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Question 18
jamb 1980

A tugboat is travelling from Asaba to Onitsha across the River Niger with a resultant velocity of 20 knots. If the river flows at 12 knots, the direction of motion of the boat relative to the direction of water flow is?

A36.87o
B53.13o
C90o
D136o
E143.13o
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Question 19
jamb 1980
A stand-by generator is connected to fifteen 40 W lamps and musician's 600 W amplifying system. How much energy is used if the generator runs for 6 hours?
A3.84k Wh
B7.20k Wh
C8.40k Wh
D12.00k Wh
E14.56k Wh
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Question 20
jamb 1980
A quantity of sungas at -133 occupies 1/3m3 under pressure 1.4 x 105 Nm-2. if the gas occupies 31 m-2 at 37oC, its pressure will be
A1.26 x 103Nm-2
B3.3 x104Nm-2
C1.35 x 104Nm-2
D2.2 x 104Nm-2
E105Nm-2
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Question 21
jamb 1980
If the magnification of a virtual image formed of an object 10cm from a convex lens is 3, then the focal length of the lens is
A10cm
B15cm
C16cm
D19cm
E20cm
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Question 22
jamb 1980
What is the relative permitivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads?
Ao
B\(\frac{1}{2}\)
C2
D8
E32
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Question 23
jamb 1980

Which of the following statements on the use of X-rays is incorrect? X-rays are used

Ain hospitals to obtain photogaphs of tissues and bones in the body
Bfor the treatment of malignant growths like cancer cells
Cin detecting fingerprints
Dto reveal hidden flaws in metal castings and welded joints
Eto detect alternations which have been made to works of art
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Question 24
jamb 1980

The name given to the characteristics behavior of substances which set their length perpendicular to a strong magnetic field instead of in line with it is

Amagnetization
Bparamagnetism
Cdiamagnetism
Ddemagnetization
Eferromagnetism
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Question 25
jamb 1980

Any line or section through an advancing wave in which all the particles are in the same phase is called the

Awave lenght
Bwave crest
Cwave trough
Dwave amplitude
Ewave front
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Question 26
jamb 1980

Which of the following statements is NOT true of the image in a plane mirror? The image is

Athe same size as the object
Blaterally inverted
Cvirtual
Dmagnified
Ethe same distance behind the mirror as the object is in front
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Question 27
jamb 1980

a pressure cooker saves both time and fuel in cooking because inside the cooker, the

Aboiling point of water is raised
Bpressure is constant
Cheat is completely trapped
Dtemperature is evenly distributed
Evolume of steam varies
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Question 28
jamb 1980

The water at the bottom of a waterfall is slightly warmer than that at the top because part of the

Apotential energy raises the water temperature
Bwater absorbs latent heat from the atmosphere
Ckinetic energy is changed intyo internal energy
Ddropping mass of water increases the heat capacity
EA and C above
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Question 29
jamb 1980
which of the following does NOT cause a reduction of the surface tension of water?
Asoap solution
Bdetergent
Calcohol
Dcamphor
Egrease
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Question 30
jamb 1980

The motion of the moving skin of a talking drum can rightly be described as

Atranslational
Brandom
Crotational
Doscillatory
Etransitory
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