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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 361

jamb 2015

In an inelastic collision

I. Energy is conserved
II. Energy is decreased
III. Energy is increased
IV. Linear momentum conserved

AI only

BII and IV only

CII only

DIII only

View Explanation & Discuss

Question 362

jamb 2015

Which of the following instrument is most accurately for comparing electromotive force (e.m.f) of two cells?

AVoltmeter

BMeter rule

CGalvanometer

DPotentiometer

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Question 363

jamb 2015

When a man moves toward a plane mirror at a speed of 6m/s, the distance the man and his image increased at a speed of?

A2 m/s

B4 m/s

C12 m/s

D14 m/s

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Question 364

jamb 2015

Volatile liquids usually

AHave high boiling points

Bhave low boiling points

Chave high densities

Dhave high melting points

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Question 365

jamb 2015

Efficiency of a transformer is equal to

AEfficiency of transformer = (secondary coil ÷ primary coil) × 100%

BEfficiency of transformer = (mechanical advantage ÷ velocity ratio) × 100%

CEfficiency of a transformer = (Number of turns in the secondary coil ÷ Number of turns in the primary coil) × 100%

DEfficiency of a transformer = (power developed in the secondary coil ÷ power supplied to the primary coil) × 100%

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Question 366

jamb 2015

Which one of the following is a vector quantity?

ATemperature gradient

BMass

CWork

DTime

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Question 367

jamb 2015

The eyeball consists of a round tough white skin called

ASclerotic

BChoroid coal

COptical fiber

DAccommodation

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Question 368

jamb 2015

The net movement of solvent molecules from a region of high solvent potential to a region of lower solvent potential through a partially or semi permeable membrane is refer to as

ADiffusion

BOsmosis

CSurface tension

DCohesion

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Question 369

jamb 2015

A regular spacing or arrangement of atoms in a crystalline material is called

AOrbit

BLattice

CAtomic structure

DEnergy level

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Question 370

jamb 2015

Heat transfer by convection will take place in one the following substance.

AStone

BWood

CMercury

DWater

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Question 371

jamb 2015

The r.m.s value of a supply voltage is quoted at 200v. What is the approximate peak value of the voltage?

A200volts

B300volts

C283volts

D250volts

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Question 372

jamb 2015

A good electric cell should have the following except

AA minimum of polarization effect

BA long life

CA cheap and safe electrolytes

DCost and dangerous of the cell

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Question 373

jamb 2015

The dimension of universal gravitational constant is……….?

A\( M^{–1}L^3 T^{–2} \)

BML³T²

CML³

DMLT^-2

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Question 374

jamb 2015

What is the S.I unit of relative density?

Akg m^-2

Bkg m²

Ckg cm³

Dhas no S.I unit

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Question 375

jamb 2015

If a projectile has maximum range of 36m, find the speed of projection (Take g = 9.8m/s2)

A19m/s

B2m/s

C4m/s²

D7m/s²

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Question 376

jamb 2015

Neutron were discovered by

AJ.J. Thompson

BJames Chadwick

CMichael faraday

DDalton

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Question 377

jamb 2015

The two liquids which are often used in thermometer on experiment basic is known as

AMercury only

BAlcohol and Water

CMercury and Alcohol

DAlcohol only

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Question 378

jamb 2015

Transformers are designed so that energy losses are reduced to a minimum. This is achieved through which of these process?

I. Using a soft iron ore
II. Laminating the iron core to reduce energy loses due to eddy current
III. Designing an efficient iron core

AI & II only

BII only

CI, II, & III only

DIII only

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Question 379

jamb 2015

Which of the following will increase the boiling point of water?

I. Taking it to a high altitude
II. Dissolving a salt into it
III. Heating it in a sealed flask
IV. Increasing the rate of heat supply

.

AI only

BIII & IV only

CII & III only

DII only

View Explanation & Discuss

Question 380

jamb 2015

The strength of an electromagnet increases with

AIncreases in the number of turn of the coil

BDecreases in current with the coil

CIncreases in the distance between the pole

DIncreases in current without the coil

View Explanation & Discuss

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