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137 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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137 questions

Question 1 of 20 137 total questions

Question 31

jamb 2018

Which of the following instruments is most suitable for measuring the outside diameter of a narrow pipe in a few millimeters in diameter?

APair of calipers

BMeter rule

CMicrometer screw gauge

DTape rule

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Question 32

jamb 2018

An object weighs 30N in air and 21N in water. The weight of the object when completely immersed in a liquid of relative density 1.4 is

A25.2N

B17.4N

C12.6N

D9.0N

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Question 33

jamb 2018

The efficiency of energy conversion on the energy flow through a hydroelectric power is?

A\(\frac{E1}{E2}\)

B\(\frac{E3}{E2}\)

C\(\frac{E2}{E1}\)+ E2

D\(\frac{E2}{E3}\) + E1

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Question 34

jamb 2018

A ball of mass 5.0kg hits a smooth vertical wall normally with a speed of 2ms\(^{-1}\). Determine the magnitude of the resulting impulse

A20.0kgms\(^{-1}\)

B10.0kgms\(^{-1}\)

C5.0kgms\(^{-1}\)

D2.5kgms\(^{-1}\)

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Question 35

jamb 2018

Palm oil from a bottle flows out more easily after it has been heated because the

AMolecules do not increase speed during the heating

BViscosity of oil is reduced

COil molecules force each other out

DAdhesion between the oil molecules and those of the bottle is increased

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Question 36

jamb 2018

Which of the following is the dimension of pressure

AML\(^{−1}\)T\(^{−2}\)

BMLT\(^{−2}\)

CML\(^{2}\)T\(^{3}\)

DML\(^{−3}\)

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Question 37

jamb 2018

To keep a vehicle moving at a constant speed V requires power P from the engine. The force provided by the engine is

A\(\frac{P}{v}\)

B(\(\frac{1}{2}\))V

CPV

D\(\frac{P}{V^2}\)

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Question 38

jamb 2018

A particle of mass M initially at rest splits into two. If one of the particles of mass M1 moves with velocity V1 , the second particle moves with velocity

A\(\frac{M1V1}{M-M1}\)

B\(\frac{M1V1}{M1-M}\)

C\(\frac{M1V1}{M}\)

D\(\frac{MV}{M-M1}\)

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Question 39

jamb 2018

The friction which exist between two layers of liquid in relative motion is called.

ACapillary

BSurface

CViscosity

DCohesion

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Question 40

jamb 2018

Which of the following phenomena cannot be explained by the molecular theory of matter?

AConduction

BConvection

CExpansion

DRadiation

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Question 41

jamb 2018

A room is heated by means of a charcoal fire, an occupants of the room standing away from the fire is warmed mainly by

AConvection

BRadiation

CConduction

DReflection

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Question 42

jamb 2018

Which of the following is not a product of nuclear fusion?

AX – ray

BY –ray

Cα – particles

Dneutron

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Question 43

jamb 2018

The process by which protons are converted into helium atoms with a tremendous release of energy is called?

Athermionic emission

Bnuclear fission

Cthermonuclear fusion

Dphotoelectric emission

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Question 44

jamb 2018

Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules.

ATransitional Motion

BRotational Motion

CBrownian Motion

DOscillatory Motion

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Question 45

jamb 2018

Water of mass 150g at 60\(^o\)c is added to 300g of water at 20\(^o\)c and the mixture is well stirred. Calculate the temperature of the mixture.(neglect heat losses to the surroundings)

A33\(^o\)c

B40\(^o\)c

C25\(^o\)c

D10\(^o\)c

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Question 46

jamb 2018

Mercury which is spilled onto a glass surface forms ball-like shapes because____.

AMercury is a metal

BThe cohesive force between its molecules is greater than the adhesive force between mercury and glass molecules

CThe cohesive force between its molecules is less than the adhesive force between mercury and glass molecules

DThe viscosity of mercury is height

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Question 47

jamb 2018

A 40W instrument has a resistance 90 Ohms. On what voltage should it be operated normally

A60V

B150V

C225V

D360V

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Question 48

jamb 2018

Which of the following is an essential physical property of the wires uses for making fuses ?

ALow density

BHypothermal conductivity

CLow electrical resistivity

DLow melting point

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Question 49

jamb 2018

A man hears his echo from a nearby hill 2s after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.29m, how far away is the hill?

A330.0m

B335.4m

C660.0m

D670.8m

View Explanation & Discuss

Question 50

jamb 2018

A solid cube of side 50cm and mass 75kg floats in a liquid with \(\frac{1}{3}\) of its height above the liquid surface. The relative density of the liquid is?

A0.33

B0.50

C0.67

D0.90

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