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4,719 questions

Question 1 of 20 4,719 total questions

Question 251

waec 2022

The periodic rise and fall in the intensity of sound produced whn two notes of nearly equal frequencies are sounded together is called?

Adoppler effect

Bbeat

Cinterference

Dresonance

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Question 252

waec 2022

An object is placed at different distances, u, from a converging lens of focal length, 15.0cm. For what value of u does the lens act as a microscope?

Au = 15cm only

Bu = 30cm only

CM < 15cm only

Du > 30cm only

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Question 253

waec 2022

A freely suspended compass needle on the earth's surface settles in a plane called----------

Ageographic meridian

Bmagnetic meridian

Cmagnetic declination

Disoganals

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Question 254

waec 2022

The efficiency of a wheel and axle is 100% and the ratio of their radii is 5:1. calculate the effort required to lift a load of mass 20kg using this machine, [g = 10 m s\(^{-2}\)]

A20N

B25N

C40N

D100N

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Question 255

waec 2022

Which of the following descriptions of the image formed by a plane mirror is not correct. the image is----

Aerect and of the same size as the object

Blaterally inverted and of the same size as the object

Cerect and bigger than the object

Dvirtual and if the same size

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Question 256

waec 2022

An example of a mechanical wave is---------

Awater waves

Bradio waves

Cx-rays

Dlight rays

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Question 257

waec 2022

Which of the following statement(s) is/are correct about a fixed mass of gas compressed in an inexpansible container;

I. The average speed of the molecules increases

II. The temperature of the gas increases

III. The molecules hit the walls of the container more often than before the compression

AI only

BI and II only

CI, II, and III only

DI and III

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Question 258

waec 2022

The joule is equivalent to?

AKg m\(^{2}\) s\(^{-1}\)

BKg\(^{2}\) m s\(^{-2}\)

CKg m\(^{2}\) s\(^{-2}\)

DKg m s\(^{-1}\)

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Question 259

waec 2022

The correct relationship between the displacement, s, of a particle initially at rest in a linear motion and the time, t, is?

As \(\alpha\) t\(^{-2}\)

Bs \(\alpha\) t\(^{-1}\)

Cs \(\alpha\) t

Ds \(\alpha\) t\(^{2}\)

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Question 260

waec 2022

Which of the illustrated graphs above represents a body moving with uniform retardation?

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Question 261

waec 2022

Suppose three identical steel balls Q, R, and S, are placed on an undulating ground as illustrated in the diagram above. Which of the balls is/are in neutral equilibrium?

AS only

BQ only

CR only

DQ and S only

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Question 262

waec 2022

The linear expansivity, \(\alpha\), and cubic expansivity, \(\gamma\), of a material are related by the equation?

A\(\gamma\)=a

B\(\gamma\)=3\(\alpha\)

C\(\gamma\)=2a

D\(\gamma\)=\(\frac{1}{3} \alpha \)

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Question 263

waec 2022

The length of a simple pendulum is increased by a factor of four. By what factor is its period increase?

A0.5\(\pi\)

C2\(\pi\)

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Question 264

waec 2022

From the principle of flotation, a body sinks in a fluid until it displace a quantity equal to its own?

Adensity

Bmass

Cweight

Dvolume

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Question 265

waec 2022

The area under a force-time graph represents--------

Achange in kinetic energy

Bchange in momentum

Cchange in work done

Dchange in internal energy

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Question 266

jamb 2022

If an object just begins to slide on a surface inclined at 30º to the horizontal,the coefficient of friction is?

A√3

B\(\frac{√3}{2}\)

C\(\frac{1}{√2}\)

D\(\frac{1}{√3}\)

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Question 267

jamb 2022

The mercury column in the barometer at notational atmospheric pressure has a height of?

A0.76 cm at see level

B760 cm at sea level

C7.6 cm at sea level

D76 cm at sea level

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Question 268

jamb 2022

One of the following is a scalar quantity?

Aweight

Bmomentum

Cpotential energy

Ddisplacement

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Question 269

jamb 2022

A semiconductor is formed by?

Aco-ordinate bonds

Belectrovalent bonds

Ca substance free of bonds

Dcovalent bonds

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Question 270

jamb 2022

The main factor which affects the speed of sound wave is the?

Aproperties of the medium

Bamplitude of the sound wave

Cintensity of the sound wave

Dloudness of the sound wave

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