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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 631

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

View Explanation & Discuss

Question 632

jamb 2004

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

Aconduction only

Bconvention only

Cconvection and conduction

Dradiation only

View Explanation & Discuss

Question 633

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

View Explanation & Discuss

Question 634

jamb 2004

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

A2π

Bπ

C^π/₄

D^π/₂

View Explanation & Discuss

Question 635

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

View Explanation & Discuss

Question 636

jamb 2004

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

A1/√3

B2√3

C√3

D2/√3

View Explanation & Discuss

Question 637

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 638

jamb 2004

The pitch of a sound note depends on

Atimbre

Bfrequency

Charmonics

Dquality

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Question 639

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

View Explanation & Discuss

Question 640

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

View Explanation & Discuss

Question 641

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.

View Explanation & Discuss

Question 642

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

View Explanation & Discuss

Question 643

jamb 2004

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

Aoil

Bmetal

Cgas

Dwater

View Explanation & Discuss

Question 644

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

View Explanation & Discuss

Question 645

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

View Explanation & Discuss

Question 646

jamb 2004

As the pressure of a fluid increases, its viscosity

Adecreases

Bincreases

Cincreases then decreases

Dremains constant

View Explanation & Discuss

Question 647

jamb 2004

A 100kg box is pushed along a road with force of 500N. If the box moves with a uniform velocity, the coefficient of friction between the box and the road is

A0.4

B1.0

C0.8

D0.5

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Question 648

jamb 2004

In a hydraulic press , a force of 40N is applied on the effort piston of area 0.4m². If the force exerted on the load piston is 400N, the area of the large piston is

A4m²

B8m²

C2m²

D1m²

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Question 649

jamb 2004

I. Jet propelled aircraft
II. Rocket propulsion
III. The recoil of a gun
IV. A person walking
Which of the above is based on Newton's third law of motion

AI and II only

BI, II, III, and IV only

CI and III only

DI, II and III only

View Explanation & Discuss

Question 650

jamb 2004

A machine whose efficiency is 60% has a velocity ratio of 5. If a force of 500N is applied to lift a load P, what is the magnitude of P?

A1500N

B500N

C4166N

D750N

View Explanation & Discuss

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