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50 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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50 questions

Question 1 of 20 50 total questions

Question 1

jamb 2004

If a force of 50N stretches a wire from 20m to 20.01m, what is the amount of force required to stretch the same material from 20m to 20.05m?

A250N

B200N

C100N

D50N

View Explanation & Discuss

Question 2

jamb 2004

A cell whose internal resistance is 0.5Ω delivers a current of 4A to an external resistor,The loss voltage of the cell is

A1.250V

B2.000V

C8.000V

D0.125V

View Explanation & Discuss

Question 3

jamb 2004

Calculate the angle of minimum deviation for a ray which is refracted through an equiangular prism of refractive index 1.4

A60⁰

B29⁰

C99⁰

D90⁰

View Explanation & Discuss

Question 4

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

View Explanation & Discuss

Question 5

jamb 2004

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

Adiffraction

Brefraction

Cpolarization

Dreflection

View Explanation & Discuss

Question 6

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

View Explanation & Discuss

Question 7

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

View Explanation & Discuss

Question 8

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 9

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 10

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 11

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 12

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 13

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 14

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

View Explanation & Discuss

Question 15

jamb 2004

The pitch of a sound note depends on

Atimbre

Bfrequency

Charmonics

Dquality

View Explanation & Discuss

Question 16

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 17

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 18

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 19

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 20

jamb 2004

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

Aoil

Bmetal

Cgas

Dwater

View Explanation & Discuss

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