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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 1981

jamb 1991

A wheel and axle have radii 80cm and 10cm respectively. If the efficiency of the machine is 0.85, an applied force of 1200N to the wheel will raise a load of

A8.0N

B6.8N

C8160N

D9600N

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Question 1982

jamb 1991

A spring of force constant 1500Nm^-1 is acted upon by a constant force of 75N. Calculate the potential energy stored in the string

A1.9J

B2.8J

C3.45J

D0.43J

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Question 1983

jamb 1991

A body of mass 100g moving with a velocity of 10.0ms-1 collides with a wall. If after collision, it moves with a velocity of 2.0ms-1 in the opposite direction, calculate the change in momentum.

A0.8Ns

B1.2Ns

C12.0Ns

D80.0Ns

View Explanation & Discuss

Question 1984

jamb 1991

An object moves with uniform speed round a circle. Its acceleration has

Aconstant magnitude and constant direction

Bconstant magnitude and varying direction

Cvarying magnitude but constant direction

Dvarying magnitude and varying direction

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Question 1985

jamb 1991

A small metal ball thrown vertically upwards from the top of a tower with an initial velocity of 20ms-1. If the ball took a total of 6s to reach ground level, determine the height of the tower [g = 10ms-2]

A60m

B80m

C100m

D120m

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Question 1986

jamb 1991

A body of weight W N rest on a smooth plane inclined at an angle\(\theta\)^o to the horizontal. What is the resolved part of the weight in Newtons along the plane?

AW sin\(\theta\)

BW cos\(\theta\)

CW sec\(\theta\)

DW tan\(\theta\)

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Question 1987

jamb 1991

Which of the following is the most suitable for use as an altimeter?

AA mecury barometer

BA fortin barometer

CA mecury manometer

DAn aneroid barometer

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Question 1988

waec 1990

Which of the following is not an evidence of the particle nature of matter?

ADiffusion

BBrownian motion

CDiffraction

DCrystal structure

EPhotoelectricity

View Explanation & Discuss

Question 1989

waec 1990

What is the difference between a crystalline and an amorphous solid? A crystalline solid

Ahas cubic structure while amorphous solid has hexagonal structure

Bhas regularly-repeating pattern while an amorphous solid has not

Cis white while amorphous solid is yellow

Dis always hard while amorphous solid is always soft

Emelts on heating while an amorphous solid sublimates on heating.

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Question 1990

waec 1990

Which of the following is not crystal?

ASodium chloride

BLead

CCopper (II) tetraoxosulphate (VI)

DGlass

EGermanium

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Question 1991

waec 1990

Viscosity in a liquid does not depend on the

Anature of the liquid

Brelative velocity between the liquid layers

Carea of the surfaces in contact

Dtemperature of the liquid

Enormal reaction between the liquid layers

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Question 1992

waec 1990

A metal is illuminated with a radiation of energy 6.88eV If the kinetic energy of the emitted electrons is 1.5OeV, calculate the work function of the metal.

A0.22eV

B4.59eV

C5.38eV

D8.38eV

E10.32eV

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Question 1993

waec 1990

A radioactive substance has a half-life of 20 hours. What fraction of the original radioactive nuclei will remain after 80 hours?

A1/32

B1/16

C1/8

D1/4

E1/2

View Explanation & Discuss

Question 1994

waec 1990

Water does not drip through an open umbrella of silk material unless the inside of the umbrella is touched. Which of the following phenomena is responsible for this?

ASurface tension

BHydrostatic upthrust

CViscosity

DDiffusion

EOsmosis

View Explanation & Discuss

Question 1995

waec 1990

The nucleon number and the proton number of a neutral atom of an element are 238 and 92 respectively. What is the number of neutrons in the atom?

A330

B165

C146

D119

E73

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Question 1996

waec 1990

Which of the following statements about the atom is/are correct? I. Energy is needed to remove electrons from an atom II. Particles in the nucleus of an atom are bound together by strong forces. III. A large amount of energy is required to separate the particles in the nucleus of an atom. IV. When the nucleus of a uranium atom is split, the energy released accounts for the difference in the masses of the products and the parent nucleus

AI only

BI and II only

CI and III only

DII and IV only

EI, II, III and IV

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Question 1997

waec 1990

When the pressure of the gas in a discharge tube is gradually lowered. I. there is a violet glow in the tube II. the glow in the tube splits into bands which get further apart. III, the glow and the bands eventually disappear and there is a green fluorescence in the tube. IV. the tube breaks into pieces. Which of the following are correct?

AI and II only

BI and III only

CI and IV only

DI, II and III only

EI, II III and IV

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Question 1998

waec 1990

Which of the following particles conduct electricity through salty water?

AAtom

Bmolecules

CElectrons

DNeutrons

EIons

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Question 1999

waec 1990

Which of the following reduce(s) the effect of the back e.m.f. generated in the primary coil of an induction coil? The capacitor in the circuit II. The make and break contact in the circuit III. The ratio of turns in the secondary to that in the primary

Al only

BII only

CI and II only

DII and III only

EI, II and III.

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Question 2000

waec 1990

How long will it take to heat 3 kg of water from 28^oC to 88^oC in an electric taking a current of 6 A from an e.m.f. source of 220V?

A96s

B1.20s

C570s

D600s

E1200s

View Explanation & Discuss

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