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2,483 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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2,483 questions

Question 1 of 20 2,483 total questions

Question 281

jamb 2018

A man hears his echo from a nearby hill 2s after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.29m, how far away is the hill?

A330.0m

B335.4m

C660.0m

D670.8m

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Question 282

jamb 2018

A solid cube of side 50cm and mass 75kg floats in a liquid with \(\frac{1}{3}\) of its height above the liquid surface. The relative density of the liquid is?

A0.33

B0.50

C0.67

D0.90

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Question 283

jamb 2018

Which of the following concepts is not an evidence of the particles nature of matter?

ADiffusion

BBrownian motion

CDiffraction

DEsterification

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Question 284

jamb 2018

The product of force and time is?

AImpulse

BMomentum

CInertia

DFriction

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Question 285

jamb 2018

Temperature is the property of a body which is proportional to the ____.

Atotal kinetic energy of its molecules

Baverage kinetic energy of its molecules

Caverage speed of its molecules

Dmaximum speed of its molecules

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Question 286

jamb 2018

What flows to the positively charged conductor by connecting it to the earth?

AElectrons

BIon

CNeutron

DProton

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Question 287

jamb 2018

An electric heating coil rated at 1Kw is used to heat 2kg of water for 2 minutes. The initial water temperature is 30\(^o\)C. Taking the specific heat of the water as 4,000Jkg \(^{-1}\) and neglecting that of the container, the final water temperature is

A15.0\(^o\)C

B45.0\(^o\)C

C60.0\(^o\)C

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Question 288

jamb 2018

A beam of light is incident from air to water at an angle of 30\(^o\). Find the angle of refraction if the refractive index of water is 4/3

A15\(^o\)

B18\(^o\)

C22\(^o\)

D24\(^o\)

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Question 289

jamb 2018

The resistance of a 40W car head lamp, drawing current from a 12V battery is ____.

A0.3Ω

B3.3Ω

C3.6Ω

D4.8Ω

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Question 290

jamb 2018

A force of 5N acts at a point Y on a rod XYZ as shown in this diagram. If XYZ is 2m, what is the moment of the force about point X?

A0Nm

B3Nm

C7Nm

D10Nm

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Question 291

jamb 2018

The energy needed to move a unit positive charge around a complete electric circuit is called the

Aelectromotive force

Belectric potential difference

Celectric energy

Dkinetic energy

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Question 292

jamb 2018

An object is placed 20cm from a concave mirror of focal length 10cm. The linear magnification of the image produced is?

B\(\frac{1}{2}\)

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Question 293

jamb 2018

The tendency of a body to remain at rest when a force is applied to it is called.

AImpulse

BMomentum

CInertia

DFriction

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Question 294

jamb 2018

A 20kg mass is to be pulled up a slope inclined at 30° to the horizontal. If efficiency of the plane is 75%. The force required to pull the load up the plane is J [g=10ms\(^{− 2}\)]

A87N

B73.5N

C133.3N

D533.2N

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Question 295

jamb 2018

A body of mass 100g moving with a velocity of 10ms-1 collides with a wall. If after collision it moves with a velocity of 2.0ms−1 in the opposite direction, calculate the change in momentum.

A0.8Ns

B1.2Ns

C12.0Ns

D80.0Ns

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Question 296

jamb 2018

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 297

jamb 2018

A ball of mass 800g moving horizontally with a speed of 5m/s hits a vertical wall and rebounds with the same speed. The impulse experienced by the ball is?

A0kgm

B2kgm/s

C4kgm/s

D8kgm/s

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Question 298

jamb 2018

When an atom loses or gain a charge it becomes

AAn electron

BAn ion

CA neutron

DA proton

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Question 299

jamb 2018

A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?

A36.0

B7.2

C5.0

D3.6

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Question 300

jamb 2018

The inner diameter of a small test tube can be measured accurately using a

AMicrometres screw gauge

BPair of dividers

CMetre rule

DPair of vernier calliper

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