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98 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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98 questions

Question 1 of 18 98 total questions

Question 41

jamb 2007

A glass plate 0.9cm thick has a refractive index of 1.50. How long does it take for a pulse of light to pass through the plate?
[c = 3.0 x 10\(^8\) ms-1]

A4.5 x 10^-11s

B4.5 x 10^-10s

C4 .5 x 10^-12 s

D3.0 x 10^-10s

View Explanation & Discuss

Question 42

jamb 2007

The instrument used by designers to obtain different color pattern is called?

Aperiscope

Bsextant

Cepiscope

Dkaleidoscope

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Question 43

jamb 2007

The phenomenon of light bending round an obstacle is?

Adiffraction

Brefraction

Creflection

Dpolarization

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Question 44

jamb 2007

In a large telecommunications auditorium, perforated absorbent materials are used to line the ceiling so as to

AIncrease the reverberation of sound in the hall

Bincrease the amount of echo in the hall

Creduce the hight of the ceiling from the floor

Dreduce the reverberation of sound in the hall

View Explanation & Discuss

Question 45

jamb 2007

I. They should be identical
II. They should originate from the same source.
III. They should be coherent.
IV. They should be monochromatic.
from the statements above, the conditions for two waves to interfere are?

AI,II and III only

BI, III and IV only

CII, III and IV only

DI, II, III and IV

View Explanation & Discuss

Question 46

jamb 2007

The blade of a hoe feel colder to touch in the morning than the wooden handle because the

Ahandle is a better conductor of heat than blade

Bhandle contains stored energy in form of heat

Cblade is a better conductor of heat than the handle

Dblade is placed at a lower temperature than the heat

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Question 47

jamb 2007

I. Mass
II. Density
III. Temperature
IV. Nature of substance
which of the above affect diffusion?

AI and II only

BI,II and IV only

CII, III and IV only

DI, II, III and IV

View Explanation & Discuss

Question 48

jamb 2007

I. Increase the melting point of the liquid.
II. Increase the boiling point of the liquid.
III. Decrease the melting point of the liquid.
IV. Decrease the boiling point of the liquid.
which of the statement above about the effect on increase in pressure in a liquid are correct?

AI and II only

BI and III only

CII and III only

DIII and IV only

View Explanation & Discuss

Question 49

jamb 2007

2 kg of water is heated with a heating coil which draws 3.5 A from a 200 V mains for 2 minutes. what is the increase in temperature of the water?

[specific heat capacity of water = 4200 jkg ^-1k^-1]

A30°

B25°

C15°

D10°

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Question 50

jamb 2007

I. Use a liquid with a high melting point.
II. use a liquid of high volume expansivity.
III. use a capillary tube of large diameter.

which of the above best describes how the sensitivity of a liquid-in-glass thermometer can be enhanced?

AI only

BII. only

CI and II only

DII and III only

View Explanation & Discuss

Question 51

jamb 2007

A clinical thermometer is different from other mercury in glass thermometers owing to

Athe constriction on its stem

Bthe grade of mercury used in it

Cits long stem

Dits wide range of temperatures

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Question 52

jamb 2007

A piece of iron weights 250 N in air and 200 N in a liquid of density 1000 kgm-3. the volume of the iron is?

A5.0 x 10^-3 m^-3

B4.5 x 10^-3 m^-3

C2.5 x 10^-3 m^-3

D2.0 x 10^-3 m^-3

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Question 53

jamb 2007

A reservoir 500 m deep is filled with a fluid of density 850 kgm-3. If the atmospheric pressure is 1.05 x 105 Nm-2, the pressure at the bottom of the reservoir is.
[g = 10ms-2]

A4.72 x 10⁶ Nm^-2

B4.36 x 10⁶ Nm^-2

C4.28 x 10⁶ Nm^-2

D4.25 x 10⁶ Nm^-2

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Question 54

jamb 2007

A machine has a velocity ratio of 4. if it requires 800 N to overcome a load of 1600 N,what is the efficiency of the machine?

A60%

B50%

C40%

D2%

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Question 55

jamb 2007

Two spheres of masses 5.0 kg and 10.0 kg are 0.3 m apart. Calculate the force of attraction between them?
[G = 6.67 X 10-11 Nm2 Kg\(^{-2}\)]

A3.50 x 10^-10N

B3.71 x 10^-8 N

C3.57 x 10^-2N

D4.00 x 10²N

View Explanation & Discuss

Question 56

jamb 2007

A car of mass 1500 kg goes round a circular curve of radius 50m at a speed of 40 ms-1. The magnitude of the centripetal force on the car is ?

A4.8 x 10⁴ N

B4.8 x 10³ N

C1.2 x 10³ N

D1.2 x 10² N

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Question 57

jamb 2007

A gramophone record takes 5s to reach its constant angular velocity of 4\(\pi\) rads^-1 from rest. Find its constant angular acceleration.

A0.4\(\pi\) rads^-2

B0.8\(\pi\) rads^-2

C1.3\(\pi\) rads^-2

D20.0\(\pi\) rads^-2

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Question 58

jamb 2007

The unit of moment of a couple can be expressed in?

AN m^-1

BN m^-2

CN m

DN m²

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