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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 491

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 492

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 493

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 494

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 495

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 496

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 497

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 498

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 499

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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Question 500

jamb 2018

Calculate the effective capacitance of the circuit in the diagram given

A4μf

B3μf

C2μf

D1μf

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Question 501

jamb 2018

What effort will a machine of efficiency 90% apply to a load of 180N if its efforts arm is twice as long as its load arm?

A100N

B90N

C80N

D120N

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Question 502

jamb 2018

An object moves in a circular path of radius 0.5m with a speed of 1ms\(^{-1}\). What is its angular velocity?

A8rads\(^{-1}\)

B4rads\(^{-1}\)

C1rads\(^{-1}\)

D2rads\(^{-1}\)

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Question 503

jamb 2018

In homes, electrical appliances and lamps are connected in parallel because

Aless current will be used

Bless voltage will be used

Cparallel connection does not heat up the wires

Dseries connection uses high voltage

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Question 504

jamb 2018

In the diagram shown, If the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be

Anorth and south

Bsouth and south

Cnorth and north

Dsouth and north

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Question 505

jamb 2018

Musical instruments playing the same note can be distinguished from one another owing to the difference in their

Aquality

Bpitch

Cintensity

Dloudness

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Question 506

jamb 2018

Convex mirrors are used as driving mirrors because images formed are

Aerect, Virtual and diminished

Berect, real and diminished

Cerect, virtual and magnified

Dinverted, virtual and diminished

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Question 507

jamb 2018

The differences observed in solids, liquids and gases may be accounted for by

Atheir relative masses

Btheir melting points

Cthe spacing and forces acting between the molecules

Dthe different molecules in each of them

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Question 508

jamb 2018

The process whereby a liquid turns spontaneously into vapour is called

Aregelation

Bevaporation

Cboiling

Dsublimation

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Question 509

jamb 2018

Electrical appliances in homes are normally earthed so that

Aa person touching the appliances is safe from electric shock

Bboth the a.c. and d.c. sources can be used

Cthe appliances are maintained at a higher pd than the earth

Dthe appliances are maintained at a lower pd than the earth

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Question 510

jamb 2018

A positively charged rod X is brought near an uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that Y has

Ano charge and a zero potential

Ba positive charge and a zero potential

Ca negative charge and a positive potential

Da negative charge and a negative potential

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