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1,904 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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1,904 questions

Question 1 of 20 1,904 total questions

Question 281

waec 2014

The region around a magnet in which magnetic force can be expressed is known as

Adeclination

Bflux density

Cfield

Dflux

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Question 282

waec 2014

An ammeter can be adapted to measure potential difference by using a

Ashunt

Bmultiplier

Crheostat

Dresistance box

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Question 283

waec 2014

An object is placed in front of two plane mirrors inclined at 60^o to each other. Determine the number of the images formed

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Question 284

waec 2014

an observer hears an echo 1.26 seconds after blowing a whistle near a cliff. calculate the distance of the observer from the cliff. [speed of sound in air = 330ms^-1]

A104.4m

B207.9m

C415.8m

D523.8m

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Question 285

waec 2014

A fish inside a pond appears to be at a depth of 1.5m when viewed vertically from above. The refractive index of the water in the pound is 1.3. Calculate the apparent displacement of the fish

A2.50m

B1.95m

C1.50m

D0.45m

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Question 286

waec 2014

The diagram above illustrates an electromagnetic wave travelling with speed 3.0 x 10⁸ms^-1. Calculate the wave length of the wave

A0.05m

B0.15m

C0.16m

D0.40m

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Question 287

waec 2014

The functional difference between a lens and a mirror is that a lens

Areflects a beam of light while a mirror refracts it

Brefracts a beam of light while a mirror reflects it

Cabsorbs incident rays while a mirror transmit them

Dtransmits incidents ray whle a mirror absorbs them

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Question 288

waec 2014

Which of the following relations about the focal length f_o of the objective and focal length f_e of the eye piece of a compound is correct?

Af_o = f_e

Bf_o < f_e

Cf_o > f_e

Df_e = 2f_o

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Question 289

waec 2014

Refraction of lights differs from reflection in that, in refraction i. at least two media are involved ii. there is a change in the direction of the ray iii. the speed of the ray changes. Which of the statements above is/are correct?

Ai only

Bi ad ii only

Cii and iii only

Di and iii only

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Question 290

waec 2014

A transverse wave can be distinguished from a longitudinal wave by

Adiffraction

Brelection

Crefraction

Dpolarization

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Question 291

waec 2014

The quality of a note depends on its

Afrequency

Bpitch

Covertones

Damplitude

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Question 292

waec 2014

A car traveling at 30ms\(^{-1}\) overcomes a frictional resistance of 100N while moving. Calculate the power developed by the engine. [1 hp = 0.75 kW]

A0.23hp

B0.40hp

C4.00hp

D4.40hp

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Question 293

waec 2014

The mass of an empty density bottle is 30g. When filled with a liquid, the mass of the bottle and the liquid is 40g. On heating the filled bottle through 40ºc, the mass reduces to 38g. Calculate the apparent cubic expansivity of the liquid

A6.25 x 10K^-1

B6.25 x 10^-3K^-1

C2.50 x 10^-3K^-1

D2.50 x 10^-4K^-1

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Question 294

waec 2014

A quantity of water at 20^oC is mixed with another quantity of water at 70^oC. The final steady temperature of the mixture is 40^oC. Determine the ratio of the mass of the cold water to that of the hot water

A7:2

B3:2

C2:5

D1:2

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Question 295

waec 2014

A body of mass M kg rests on a plane inclined at an angle \(\theta\) to the horizontal. The component of the weight of the body parallel to the plane is

AMg sin \(\theta\)

BMg cos \(\theta\)

CMg tan \(\theta\)

DMg sec \(\theta\)

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Question 296

waec 2014

Which of the following types of thermometers can be used to measure a range of temperature from -50°C to 50°? i. Clinical ii. Mercury iii. Alcohol-in-glass

Ai only

Bii only

Ciii only

Di and ii only

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Question 297

waec 2014

The change of state from solid to liquid occurs

Aat constant temperature

Bwhen temperature is lower than the boiling point

Cwhen temperature is just near freezing point

Dwhen temperature is equal to the boiling point

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Question 298

waec 2014

The temperature at which the water vapor in the air saturates the air and begins to condense is known as

Adew point

Bcritical point

Cboiling point

Dtriple point

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Question 299

waec 2014

Heat transfer by conduction is similar to wave motion because

Athere is increase in temperature

Btransfer of materials is involved

Ccharged particles vibrates at right angles

Dno transfer of materials is involved

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Question 300

waec 2014

A screw-jack has the distance between its successive threads as P and the length of its tommy bar as r. Its velocity ratio is given by the expression

A\(\frac{2 \pi r^2}{P}\)

B\(\frac{2 \pi r}{P}\)

C\(\frac{2 \pi}{rp}\)

D\(\frac{P}{2 \pi r}\)

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