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2,483 questions

Question 1 of 20 2,483 total questions

Question 381

jamb 2015

Convert 45°C to kelvin

A318K

B250K

C184K

D120K

View Explanation & Discuss

Question 382

jamb 2015

The external parts of an object can be measure accurately through the use of which scientific instrument?

AMicrometer screw gauge

BVernier Caliper

CMeter rule

DNone of the instrument

View Explanation & Discuss

Question 383

jamb 2015

What is the relationship mechanical advantage (MA) velocity Ratio (V.R) and efficiency with percentage?

Ae = M.A/V.R × 100 %

BM.A = E.V.R

CV.R = 1 ÷ sin θ M.A

DM.A = 1/E × 100%

View Explanation & Discuss

Question 384

jamb 2015

Electrons were discovered by

AJames Chadwick B.

BJ.J Thompson

CSir Isaac Newton

DCharles Newton

View Explanation & Discuss

Question 385

jamb 2015

Primary colours of light are

ARed, blue and green

BCyan, magneta and yellow

CBlack, blue and green

DNone of these colours

View Explanation & Discuss

Question 386

jamb 2015

Mr. F. Abioye observed his image through a plane mirror, kept at a distance 4.7m away from him in his room. At what distance is the image found from Abioye's eye?

A9.4m

B7.5m

C5.7m

D6.9m

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Question 387

jamb 2015

Calculate the gravitation force of attraction between two planets of \(10^{24}\)kg and \(10^{27}\)kg separated by a distance of \(10^{20}\)meters

A6.67N

B6.56N

C7.5N

D8.6N

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Question 388

jamb 2015

If an object is placed at a height of tem above the ground at a stationary point. It posses what types of energy?

AMechanical energy

BStationary energy

CPotential energy

DVibrational energy

View Explanation & Discuss

Question 389

jamb 2015

In which of the following device is the expansion of solid not required?

I. Simple pendulum
II. Fire alarms
III. Thermostat
IV. Bimetallic thermometer

AIII only

BII & III only

CI only

DII, III & IV only

View Explanation & Discuss

Question 390

jamb 2015

A vector quantity can only be completely described when ……… and …………are mentioned.

AMagnitude and motion

BMagnitude and direction

CDistance and specified displacement

DMoment and momentum

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Question 391

jamb 2015

The resultant force of a couple is ………?

AInfinity

BZero

COne

DHalf

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Question 392

jamb 2015

Which of the following is not luminous object?

AThe sun

BThe moon

Clight candle

DStar

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Question 393

jamb 2015

A motor boy of a driver saw what seems to appear to be a pool of water a head of him, while his driver drives a new truck on a sunny day. Which of the following explains his observation?

AHe saw a flying objects

BHe must be thinking of water and food

CHe was seeing the shadow of the car

DThe sun ray from the sky were passing from a hot air (layer) to cold layer

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Question 394

jamb 2015

The general gas law can be written as

APV ÷ T = a constant

BPV = a constant

Cv/t = a constant

Dp/T = a constant

View Explanation & Discuss

Question 395

jamb 2015

Body floats in fluid when its …………………

ADisplaces its own volume of the liquid (fluid)

BDisplaces its own weight of the fluid

CDisplace its own density of the fluid

DIs no longer subjected to gravity

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Question 396

jamb 2015

In an elastic collision

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

AI only

BI and IV only

CII only

DIII only

View Explanation & Discuss

Question 397

jamb 2015

A stroboscope can be used to make the wave appear …………..

AStationary

BIn motion

CDipper

DRipple

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Question 398

jamb 2015

What is the inductance (L) of an inductor whose reactance is 1Ω at 50/ π hertz (H)?

A100 H

B0.01H

C10H

D1H

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Question 399

jamb 2015

The direction of the path taken by light is called

ALocus

BLines

CRay

DBeam

View Explanation & Discuss

Question 400

jamb 2015

Boyle’s law may be Written as

AP1V1= P2V2

BV1 = V2 ÷ T1T2

CP1T1 = P2T2

DP1V1 ÷ T1 = P1V1 ÷ T2

View Explanation & Discuss

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