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4,719 questions

Question 1 of 20 4,719 total questions

Question 601

jamb 2016

A projectile is fired from the ground level with a velocity of 300ms-1 at an angle of a 30o to the horizontal.
Calculate the time taken to reach the maximum height?
[g = 10ms-2]

A30s

B20s

C25s

D15s

View Explanation & Discuss

Question 602

jamb 2016

A metre rule is pivoted at its mid-point with a vertical force of 10N hanging from the distance 30cm from the mid-point. At what distance must a 15N force hang to balance the ruler horizontally?

A30cm

B10cm

C20cm

D25m

View Explanation & Discuss

Question 603

jamb 2016

What force has to be exerted on a mass 60kg to give it an acceleration of 10ms^-2 vertically upwards?
[g = 10ms^-2

A300N

B600N

C1200N

D400N

View Explanation & Discuss

Question 604

jamb 2016

A saturated vapour pressure of a liquid increases when the

ATemperature of a liquid increases

BVolume of the liquid increases

CVolume of the liquid decreases

DTemperature of the liquid decreases

View Explanation & Discuss

Question 605

jamb 2016

A dynamo primarily converts

AMechanical energy into electrical energy

BElectrical energy into kinetic energy

CPotential energy into kinetic energy

DKinetic energy into potential energy

View Explanation & Discuss

Question 606

jamb 2016

Which of the following statements is NOT correct?

ABrownian motion is an evidence of the particle nature of matter

BAtoms combine to form molecules

CThe molecules of matter are not in constant motion

Dmatter is made up of molecules

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Question 607

jamb 2016

Semiconductor is a class of solid whose conductivity increases with an increase in

APressure

BTemperature

CCurrent

DVoltage

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Question 608

jamb 2016

A boy in a barber's shop sits between two parallel mirrors. The number of images observed by him will be

AInfinite

BTen

CEight

DForty

View Explanation & Discuss

Question 609

jamb 2016

The heat required to raise a mass of a substance through 1K is known as

ASpecific heat capacity

BSpecific latent heat of vaporization

CCapacity latent heat of fusion

DHeat capacity

View Explanation & Discuss

Question 610

jamb 2016

The rate of cooling of a heated quantity of liquid in an enclosure depends on the

APressure of the liquid

BTemperature in the enclosure

CPressure of the enclosure

DVolume of the liquid

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Question 611

jamb 2016

When an athlete perspires after running, he loses heat through

AEvaporation

BConduction

CRadiation

DConvection

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Question 612

jamb 2016

A wire of length 10m is cooled from 50oC to 10oC. Calculate the decrease in the length of the wire. [c = 3 x 10-5K-1]

A1.8 x 10^-4m

B1.5 x 10^-4m

C1.2 x 10^-2m

D1.8 x 10^-3m

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Question 613

jamb 2016

What is the angular magnification of a telescope having objective and eyepiece lenses of a focal lengths 30cm and 3cm respectively?

A60

B10

C30

D90

View Explanation & Discuss

Question 614

jamb 2016

The instrument used to view stars is the

APrism binoculars

BTelescope

CFilm projector

DMicroscope

View Explanation & Discuss

Question 615

jamb 2016

Which of the following statements is correct about a machine?

AEfficiency of a machine is always greater than I

BEfficiency decreases with an increase in friction

CVelocity ratio depends on friction

DMechanical advantage increases with an increase in friction

View Explanation & Discuss

Question 616

jamb 2016

An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image is

A80cm

B40cm

C50cm

D70cm

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Question 617

jamb 2016

If the distance between the object and the pinhole of a pinhole camera is reduced by half the size of the image of the object

AIs quadrupled

BIs halved

CRemains the same

DIs double

View Explanation & Discuss

Question 618

jamb 2016

I.Chemical II.Sound III.Electricity

Which of the above forms of energy can directly be converted to light energy?

AI and II only

BII and III only

CI, II and III

DI and III only

View Explanation & Discuss

Question 619

jamb 2016

A satellite moves in a circular orbit of radius 4R round the earth. The acceleration of the satellite in terms of g is

A\(\frac{g}{16}\)

B\(\frac{g}{4}\)

C\(\frac{4}{g}\)

D\(\frac{16}{g}\)

View Explanation & Discuss

Question 620

jamb 2016

What happens to a water pool on a day when the humidity of the air is very low?

ATemperature decreases

BSlow evaporation

CTemperature increases

DRapid evaporation

View Explanation & Discuss

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