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2,483 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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2,483 questions

Question 1 of 20 2,483 total questions

Question 691

jamb 2002

blowing air over a liquid aids evaporation by

Aincreasing its surface area

Bdecreasing its vapour pressure

Cincreasing its temperature

Ddecreasing its density

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Question 692

jamb 2002

a ray of light which strikes a glass slab from air at normal incidence passes through the slab

Aundeviated and undisplaced at a lower speed

Bdeviated and undisplaced at a lower speed

Cdeviated and displaced at a lower speed

Dundeviated and displaced at a faster speed

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Question 693

jamb 2002

water is a poor thermometric liquid because it

Ais opaque

Bis a poor conductor

Cwets glass

Dhas low vapour pressure

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Question 694

jamb 2002

A concave mirror of radius of curvature 40 cm forms a real image twice as large as the object.
the object distance is

A10 cm

B30 cm

C40 cm

D60 cm

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Question 695

jamb 2002

If tension is maintained on a stretched string of length 0.6m, such that its fundamental frequency of 220Hz is excited, determine the velocity of the transverse wave in the string.

A528 ms^-1

B264 ms^-1

C132 ms^-1

D66 ms^-1

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Question 696

jamb 2002

The time rate of loss of heat by a body is proportional to the

Adifference in temprature between the body and its surroundings

Btemperature of its surroundings

Cratio of the temperature of the body to that of its surroundings

Dtemperature of the body

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Question 697

jamb 2002

Which of the following eye defects can be corrected using a cylindrical lens.

Amyopia

BAstigmatism

CPresbyopia

DChromatic abiration

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Question 698

jamb 2002

the property that is propagated in a traveling wave is

Afrequency

Bamplitude

Cenergy

Dwave lenght

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Question 699

jamb 2002

To produce an enlarged and erect image with a concave mirror,the object must be positioned

Aat the principal focus

Bbeyond the centre of curvature

Cbetween the principal focus and the centre of the curvature

Dbetween the principal focus and the pole

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Question 700

jamb 2002

Which of the following is a characteristics of stationary waves?

AThey are formed by two identical waves travelling in opposite directions

Bthey can be transverse or longitudinal

CThe distance between two successive nodes is one wavelenght

DThe antinode is a point of minimum displacement

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Question 701

jamb 2002

I. Temperature.
II. Density of air molecules
III. Pressure
IV. Pitch
Which of the above will affect the velocity of sound in the air

AI and II only

BII and IV only

CI,II and IV only

DI,II,III nad IV

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Question 702

jamb 2002

The radiator of a motor car is cooled by

Aradiation

Bconduction

Cconvection

Dradiation and conduction

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Question 703

jamb 2002

A coin place below a rectangular glass block of thickness 9cm and refractive index 1.5 is viewed vertically above the block. The apparent displacement of the coin is

A3 cm

B5 cm

C6 cm

D8 cm

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Question 704

jamb 2002

The effect of a particle in a fluid attaining its terminal velocity is that the

Aacceleration is maximum

Bweight is equal to the retarding force

Cbuoyancy force is equal to the to the viscous retardind force

Dbuoyancy force is more than the weight of the fluid displaced

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Question 705

jamb 2002

A particle in circular motion performs 30 oscillation in 6 seconds. Its angular velocity is

A5 rad s^-1

B6 rad s^-1

C5π rad s^-1

D10π rad s^-1

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Question 706

jamb 2002

Two force each of 10N acts on a body, one towards the north and the other towards the east.
The magnitude and the direction of the resultant force are

A20N, 45°E

B20N, 45°W

C10√2N, 45°W

D10√2N, 45°E

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Question 707

jamb 2002

If the distance between two suspended masses 10kg each is tripled, the gravitational force of attraction between them is reduced by

Aone half

Bone third

Cone quarter

Done ninth

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Question 708

jamb 2002

A body weighing 80N stands in an elevator that is about to move. The force exerted by floor on the body as the elevator moves upward with an acceleration of 5 ms-2 is
[g = 10ms-2]

A40 N

B80 N

C120 N

D160 N

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Question 709

jamb 2002

The hydrostatic blood pressure difference between the head and the feet of a boy standing straight is 1.65 x 104 Nm-2. Find the height of the boy.

[ Density of blood = 1.1 x 103 kgm-3, g = 10ms-2]

A0.5 m

B0.6 m

C1.5 m

D2.0 m

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Question 710

jamb 2002

A wheel and axle is used to raise a load of 500 N by the application of an effort of 250 N. If the radii of the wheel and the axle are 0.4 cm and 0.1 cm respectively, the efficiency of the machine is

A20 %

B40 %

C50 %

D60 %

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