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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 1241

jamb 2004

A man exerts a pressure of 2.8 x 10³Nm^-2 on the ground and has 4 x 10^-2m² of his feet in contact with the ground. The weight of the man is

A102N

B70N

C140N

D112N

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Question 1242

jamb 2004

Transverse waves can be distinguished from longitudinal waves using the characteristic of

Adiffraction

Brefraction

Cpolarization

Dreflection

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Question 1243

jamb 2004

Metal rods of length 20m each are laid end to end to form a bridge at 25oC. What gap will be provided between consecutive rails for the bridge to withstand 75oC?
[Linear expansivity of the material = 2.0 x 10-5K-1

A0.20m

B0.22m

C0.25m

D0.02m

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Question 1244

jamb 2004

A 50W electric heater is used to heat a metal block of mass 5kg. If in 10 minutes a temperature rise of 12^oC is achieved, the specific heat capacity of the metal is

A400 J kg^-1K^-1

B500 J kg^-1K^-1

C390 J kg^-1K^-1

D130 J kg^-1K^-1

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Question 1245

jamb 2004

I. Wavelength
II. Medium of propagation
III. Wave velocity
IV. Frequency
V. Energy
Which of the above are used for characterizing waves?

AI, II and V

BI and IV

CI, III and IV

DIII, IV and V

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Question 1246

jamb 2004

Tea pots are often silver-coated to prevent heat loss by

Aconduction only

Bconvention only

Cconvection and conduction

Dradiation only

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Question 1247

jamb 2004

The change in volume when 450kg of ice is completely melted is [density of ice = 900 kgm\(^{-3}\), density of water = 1000 kgm\(^{-3}\)]

A0.50m³

B0.45m³

C0.05m³

D4.50m³

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Question 1248

jamb 2004

The phase difference between waves P and q in the diagram above is

A2π

Bπ

C^π/₄

D^π/₂

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Question 1249

jamb 2004

When left in a freezer, a bottle full of water cracks on freezing into ice because of the

Aincrease in the volume of water

Bcontraction of the bottle

Cexpansion of the bottle

Ddecrease in the volume of water

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Question 1250

jamb 2004

The refractive index of the medium M in the diagram above is

A1/√3

B2√3

C√3

D2/√3

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Question 1251

jamb 2004

If u is the object distance and v the image distance, which of the following expressions gives the linear magnification produced by a convex lens of focal length f?

A^u/_f - f

B^u/_v + f

C^v/_f + 1

D^v/_f - 1

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Question 1252

jamb 2004

The pitch of a sound note depends on

Atimbre

Bfrequency

Charmonics

Dquality

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Question 1253

jamb 2004

A person can focus an object only when it lies within 200cm from him. Which spectacles should be used to increase his maximum distance of distinct vision infinity

AConvex lens

BBinoculars

CConcave lens

DPlane glasses

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Question 1254

jamb 2004

A ray of light makes an angle of 35^o with a plane mirror. What is the angle of reflection?

A35^o

B55^o

C70^o

D65^o

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Question 1255

jamb 2004

What happens to the rays in a parallel beam of light?

AThey diverge as they travel

Bthey intersect

CThey converge as they travel

DThey meet at infinity.

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Question 1256

jamb 2004

What types of mirror are capable of producing parallel beams of light such as those arising from the headlamps of a car?

AParabolic mirrors

BPlane mirrors

CCylindrical mirrors

DSpherical mirrors

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Question 1257

jamb 2004

In which of the following material media will sound travel fastest?

Aoil

Bmetal

Cgas

Dwater

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Question 1258

jamb 2004

The earth is four times the size of the moon and the acceleration due to gravity on the earth is 80 times that on the moon. The ratio of the mass of the moon to that of the earth is

A1:80

B1:320

C1:1280

D1:4

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Question 1259

jamb 2004

the diagram above shows forces 4N, 6N, 10N and 8N which act at a point O in the directions indicated. the net horizontal force is

A13N

B17N

C√3N

D7√3N

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Question 1260

jamb 2004

As the pressure of a fluid increases, its viscosity

Adecreases

Bincreases

Cincreases then decreases

Dremains constant

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