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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 1381

waec 2002

A solid weight 45N and 15N respectively in air and water. Determine the relative density of the solid

A0.33

B0.50

C1.50

D3.00

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Question 1382

waec 2002

A reservoir is filled with a liquid of density 2000kgm^-3. Calculate the depth at which the pressure in the liquid will equal to 9100Nm^-2 [g = 10ms^-2]

A0.262m

B0.455m

C0.664m

D0.819m

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Question 1383

waec 2002

The force between the molecules of a liquid in contact with that of a solid is

Aadhesive

Bcohesive

Cmagnetic

Drepulsive

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Question 1384

jamb 2002

The colours seen on soap bubbles are due to

ADiffraction

BRefraction

CDispersion

DInterference

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Question 1385

jamb 2002

If the total force acting on a particle is zero, the linear momentum will

AIncrease

BDecrease

CBe Constant

DIncrease then decrease

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Question 1386

jamb 2002

A bead travelling on a straight line wire is brought to rest at 0.2 by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work done by the friction
[g = 10ms\(^2\)]

A2 x 10\(^{-4}\)

B2 x 10\(^{-3}\)

C2 x 10\(^{-1}\)

D2 x 10\(^2\)

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Question 1387

jamb 2002

Which of the following statements is true of the properties of a moving coil galvanometer?

ATHe coil has a small area

BThere are strong hair springs to gives a large control panlel

CThere is a strong permanent magnet to give high magnetic flux

Dit has a small number of turns of coil

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Question 1388

jamb 2002

A current of 0.5 A flowing 3h Deposits 2g of metal during electrolysis. The quantity of the same metal that would be deposited by the currents of 1.5A flowing in 1h is

A2g

B6g

C10g

D18g

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Question 1389

jamb 2002

At what frequency would a capacitor of 2.5μF used in the radio circuit have a reactance of 250Ω

A\(\frac{π}{800}\) Hz

B\(\frac{800}{\pi}\) Hz

C200π Hz

D2000π Hz

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Question 1390

jamb 2002

The carbon-granules microphone works on the principle of change in

Ainductance

Bresistance

Ccapacitance

Dvoltage

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Question 1391

jamb 2002

A transistor is used in the amplification of signals because it

Acontrols the flow of current

Bconsumes a lot of power

Callows doping

Dcontains electron and hole carriers

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Question 1392

jamb 2002

The particle that is responsible for the nuclear fission in a nuclear reactor is

Aneutron

Bprton

Celectron

Dphoton

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Question 1393

jamb 2002

From the generating station to each substation power is transmitted at a very high voltage so as to reduce

Ahysteresis loss

Beddy current loss

Cmagnetic flux leakage

Dheating in the coils

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Question 1394

jamb 2002

The percentage of the original nuclei of the sample of a radioactive substance left after 5 half - lives is

A8%

B5%

C3%

D1%

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Question 1395

jamb 2002

The energy associated with the photon of a radio transmission at 3 x 10⁵ Hz is
[h = 6.63 x 10^-34Js]

A2.00 x 10^-28J

B1.30 x 10^-28J

C2.00 x 10^{- 29}J

D1.30 x 10^-29J

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Question 1396

jamb 2002

Pure silicon can be converted to a p-type by adding a controlled amount of

Atrivalent atoms

Btetravalent atoms

Cpentavalent atoms

Dhexavalent atoms

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Question 1397

jamb 2002

\(^{23}_{11}\)Na + X → \(^{20}_9\)F + \(^4_2\)He

What particle is X in the reaction above?

AAlpha

BBeta

CNeurons

DGamma

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Question 1398

jamb 2002

an electric cell with nominal voltage E has a resistance of 3Ω connected across it. If the voltage falls to 0.6E, the internal resistance of the cell is

A1Ω

B2Ω

C3Ω

D4Ω

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Question 1399

jamb 2002

The electromagnetic wave that can produce a heating effect on the environment is

Ax -rays

Bultraviolet rays

Cinfrared rays

Dgamma rays

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Question 1400

jamb 2002

The electric field between two - point charges is shown in the diagram above. What types of charges are at X and Y?

ABoth X and Y are negative

BBoth X and Y are positive

CX is positive and Y is negative

DX is negative and Y is positive

View Explanation & Discuss

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