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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 2281

jamb 1981

A cell of e.m.f 2V and internal resistance 1\(\Omega\) supplies a current of 0.5 amps to a resistance whose value is

A0.5\(\Omega\)

B1\(\Omega\)

C2\(\Omega\)

D2.5\(\Omega\)

E3\(\Omega\)

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Question 2282

jamb 1981

Which of the following is NOT an effect that can be produced by an electric current?

Aheat

Blight

Csound

Dmotion

Enone of the above

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Question 2283

jamb 1981

Which of the following statements is applicable to a real image formed by a concave mirror? i. it can be observed on a screen ii. it is always inverted and in front of the mirror iii. it only seams to exist IV. it is formed by the actual converging of rays of light

Ai, ii and iii

Bi, ii and iv only

Ci and ii only

Di and ii only

Eall four statements

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Question 2284

jamb 1981

Heat may be transferred by conduction, convection and radiation. By which of these methods does heat travel through vacuum?

Aconduction only

Bconvection only

Cradiation only

Dnon of these methods

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Question 2285

jamb 1981

An inclined plane of angle \(\theta\), acting as a simple machine, has a velocity ratio

Asin\(\theta\)

B\(\frac{1}{\text{sin}\theta}\)

Ccos\(\theta\)

D\(\frac{1}{\text{cos}\theta}\)

Esin\(\theta cos\theta\)

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Question 2286

jamb 1981

Which of the following elements are real magnetic materials?

AIron, steel and nickel

Bcopper, steel and iron

Clead, iron and brass

Dglass, lead and steel

Estone, air and iron

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Question 2287

jamb 1981

If a source of sound is moving, a stationary listener will hear a sound of different frequency. This is called

ADoppler effect

BResonance

CUltra sound

DDiffraction of sound

ERarefaction

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Question 2288

jamb 1981

Which of the following does NOT describe the image formed by a plane mirror?

Aerect

Blaterally inverted

Csame distance from mirror as object

Dmagnified

Evirtual

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Question 2289

jamb 1981

When fixed mass of an ideal gas expands at constant temperature, which property of the gas molecule increases?

Aaverage number per unit volume

Baverage kinetic energy

Caverage speed

Daverage seperation

Eaverage number of collisions per unit time

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Question 2290

jamb 1981

The principle of transmissibility of pressure in a fluid at rest in all directions is known as

AArchimede's principle

BFlotation Principle

CNewton's lwa

DPascal's law

EBoyle's law

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Question 2291

jamb 1981

The following types of waves are transverse EXCEPT

Alight waves

Bradio waves

Csound waves

Dsurface waves on water

EX-rays

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Question 2292

jamb 1981

The latent heat of fusion of a substance is the heat required to

Araise the temperature of unit mass of the substance by 1 ^oC

Bmaintain unit mass of the substance at constant temperature

Cchange unit mass of substance from solid to liquid at constant temperature

Dchange unit mass of liquid to vapour at constant temperature

Eraise the temperature of unit mass by 100^oC

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Question 2293

jamb 1981

A vapour is said to be saturated when?

Amore molecules return to the liquid than leave it

Ba dynamic equilibrium exists between the liquid molecules and the vapour molecules at a given temperature

Cthe vapour pressure is atmospheric

Dthe temperature of the vapour varies

Eall molecules are moving with the same speed

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Question 2294

jamb 1981

The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths of the mercury thread when the length is 12cm, the temperature is

A32^oC

B48^oC

C56^oC

D65^oC

E75^oC

View Explanation & Discuss

Question 2295

jamb 1980

In the diagram above, a ray of light passes from glass into air, if the angle of incidence in glass is a and angle of refraction in air is \( \beta \) which of following statements is true???

A\( \alpha = \beta \)

Bthe efractive index of glass is \( \frac{sin\theta}{sin\alpha} \)

CThe ray suffers total internal reflection if \( \beta \) is greater than the critical angle

Dthe efractive index of glass is \( \frac{sin\alpha}{sin\beta} \)

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Question 2296

jamb 1980

In the diagram above, MN is perpendicular to ON and MP. What is the difference between the moment about N of the force of 20 Newtons applied along MP and its moment about O?

AZero

B0.2N.m

C0.4N.m

D0.8N.m

E0.6N.m

View Explanation & Discuss

Question 2297

jamb 1980

Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is

A0.30

B0.60

C1.67

D2.33

E2.36

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Question 2298

jamb 1980

What is the acceleration of a particle whose motion is graphically displayed in the diagram above

A0.67ms^-2

B0.83ms^-2

C0.87ms^-2

D92ms^-2

E2.0ms^-2

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Question 2299

jamb 1980

The Diagram above shows the prism arrangement in a

AMicroscope

Btereoscope

Cprojector

Dperiscope

Egyroscope

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Question 2300

jamb 1980

The total capacitance of the circuit above is?

A0.25mF

B0.50mF

C0.75mF

D1.25mF

E1.50mF

View Explanation & Discuss

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