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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 1271

neco 2003

The area under the curve of a velocity time graph represents

Aacceleration

Bdistance covered

Cinstantaneous speed

Dtime taken

Ework done

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Question 1272

neco 2003

The mode of transference of heat which does not require any material medium is

Aconduction

Bconvection

Cevaporation

Dradiation

Etransmission

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Question 1273

neco 2003

Which of the following scientists postulated that moving particles exhibit wave properties?

AErnest Rutherford

BErwin Schroedinger

CFrank Hertz

DLouis de Broglie

EWerner Heisenberg.

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Question 1274

neco 2003

The space surrounding a magnet in which the magnetic force is exerted is

Amagnetic field

Bmagnetic flux

Cmagnetic point

Dmagnetic pole

Emagnetic strength

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Question 1275

neco 2003

Which of the following statements about the concept of solid friction is NOT true?

AIt always acts in the direction of motion

BIt causes wear and tear in car tyres

CIt depends on the nature of the surfaces in contact

DIt is independent of the area of the surfaces in contact.

EIt reduces the efficiency of the machine

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Question 1276

neco 2003

In 90 seconds, the mass of a radioactive element reduces to \(\frac{1}{16}\) of its original value. Determine the half- life of the element.

A15.0s

B18.0s

C22.5s

D30.0s

E45.0s

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Question 1277

neco 2003

The distance between two successive crests of a water wave is 0.5m. If a particle on the surface of the water wave makes two complete vertical oscillations in 1s, calculate the speed of the wave.

A0.25ms^-1

B0.50ms^-1

C1.00ms^-1

D2.00ms^-1

E4.00ms^-1

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Question 1278

neco 2003

A transformer is required to give 120V from a 240V mains supply. If the primary has 5500 turns, how many turns has the secondary?

A232

B450

C550

D2750

E11000

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Question 1279

neco 2003

A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the

Acharges generated by friction in the tanker are conducted to the earth

Bchain vibrates in resonance with the tanker’s engine

Cheat generated by friction in the engine is conducted to the earth

Dpetrol tanker is balanced on the road

Etanker does not exceed a certain speed limit

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Question 1280

neco 2003

Calculate the critical angle for light traveling from water to air. (Refractive index of water = 1.33)

A36.9°

B41.3°

C48.8°

D49.2°

E51.4°

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Question 1281

neco 2003

A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C.

A6.0Ω

B6.42Ω

C7.6Ω

D8.4Ω

E16.0Ω

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Question 1282

neco 2003

The inability of the eye to focus near objects is known as

Aastigmatism

Beye ring

Chypermatropia

Dmyopia

Epresbyopia

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Question 1283

neco 2003

Which of the following motions will be produced by a pair of equal, opposite and non-collinear parallel forces acting on a body?

AOscillatory

BRandom

CRotational

DTranslational

EVibratory

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Question 1284

neco 2003

A narrow, uniform glass tube, closed at one end, constains air which is sealed by a thread of mercury. The tube is placed first horizontally and then vertically with the open end at the top. Which of the following statements is correct?

AThe length of the entrapped air in the horizontal position is less than that in the vertical position

BThe length of the entrapped air in the vertical position is less than that in the horizontal position

CThe length of the mercury column becomes shorter in the horizontal position than in the vertical position

DThe length of the mercury column becomes shorter in the vertical position than in the horizontal position

EThe pressure of the entrapped air is atmospheric in both cases.

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Question 1285

neco 2003

The S.l unit of magnetic flux density is

Afarad

Bhenry

Ckgm^-3

Dtesla

Eweber

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Question 1286

neco 2003

A stone is released from a height of 80m above the ground. Calculate its velocity just before it strikes the ground. (g = 10ms\(^{-2}\))

A25ms^-1

B40 ms^-1

C55 ms^-1

D65ms^-1

E80 ms^-1

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Question 1287

neco 2003

A constant force of 5N acts for 5s on a mass of 5kg initially at rest. Calculate the final momentum of the mass.

A125 kgms^-1

B75 kgms^-1

C25 kgms^-1

D20 kgms^-1

E5 kgms^-1

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Question 1288

neco 2003

The motion of the prongs of a sounding turning fork is

Acircular

Boscillatory

Crandom

Drotational

Etranslational

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Question 1289

neco 2003

The resistance of a series R-C circuit is 5 ω If the impedance of the circuit is 13 ω calculate the reactance of the capacitor

A12 Ω

B14 Ω

C16 Ω

D18 Ω

E65 Ω

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Question 1290

neco 2003

Two equal capacitances are connected first in series and then in parallel. The ratio of the effective series capacitance to the effective parallel capacitance is

A0.25

B0.50

C1.00

D2.20

E4.00

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