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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 1061

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

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Question 1062

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

View Explanation & Discuss

Question 1063

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 1064

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 1065

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 1066

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 1067

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 1068

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 1069

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 1070

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 1071

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

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Question 1072

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 1073

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 1074

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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Question 1075

waec 2006

Determine the magnitude of P in the diagram above

A16N

B20N

C32N

D40N

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Question 1076

waec 2006

The diagram above shows the speed-time graph of a car.If the car covered a total distance of 600m in 25s, calculate its maximum speed

A30ms^-1

B25ms^-1

C20ms^-1

D15ms^-1

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Question 1077

waec 2006

An atom \(^{234}_{91} P\) emits a gamma radiation. The resultant nuclide is

A\(^{230}_{90} Th\)

B\(^{234}_{91} Pa\)

C\(^{234}_{90} Th\)

D\(^{234}_{89} Ac\)

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Question 1078

waec 2006

Fusion is not usually used for generating electric power because

Ano energy is released when fusion takes place

Bvery high temperatures are required to initiate fusion reaction

Cthe raw materials needed is not easily available

Dheavy nuclei are involved

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Question 1079

waec 2006

A radioactive substance of mass 768g has a half life of 3 years. After how many years does this substance leave only 6g undecayed?

A21

B18

C15

D12

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Question 1080

waec 2006

A 500kV is applied across an X-ray tube. Calculate the maximum velocity of the electrons produced [Me = 9.1 x 10\(^{-31}\)kg, e = 1.6 x 10\(^{-19}\)C]

A4.2 x 10⁸ms^-1

B1.9 x 10⁸ms^-1

C4.2 x 10⁵ms^-1

D1.8 x 10⁵ms^-1

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