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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 1131

jamb 1982

The point beyond which a stretched spring does not return to its original length is called the

Abreaking point

Belastic limit

Cspring constant

Delasticity point

Erelease point

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Question 1132

jamb 1982

A hydrometer is an instrument for measuring the

Adepth of water in a vessel

Brelative density of a liquid by the method of flotation

Crelative dendity of a liquid by finding the apparent loss in weight

Drelative humidity of the air

Eatmospheric pressure when the air is humid

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Question 1133

jamb 1982

The range of accommodation of a normal human eye is

A0m to 0.1m

B0m to 0.25m

C0.10m to 0.25m

D0.10m to infinity

E0.25m to infinity

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Question 1134

jamb 1982

A hot metal ball is suspended in the open air. As it cools it loses heat by?

Aconduction only

Bconvection only

Cradiation only

Dconduction and convection

Econvection and evaporation

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Question 1135

jamb 1982

The area under a force-distance graph represents

Aacceleration

Bvelocity

Cpower

Dwork

Emomentum

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Question 1136

jamb 1982

The equation P\(^x\)V\(^y\)T\(^z\) = constant

Ax = 0, y = 0, z = 1

Bx = 1, y = 0, z = 0

Cx = 1, y = 1, z = 0

Dx = 1, y = 1, z = 1

Ex = 1, y = 1, z = -1

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Question 1137

jamb 1982

A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are

A0^o and 0^o

B60^o and 60^o

C90^o and 90^o

D90^o and 0^o

E0^o and 90^o

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Question 1138

jamb 1982

A high-resistance voltmeter reads 3.0V when connected across the terminals of a battery on open circuit and 2.6V when the battery supplies a current of 0.2A through a lamp. The resistance of lamp is

A2.00\(\Omega\)

B13.00\(\Omega\)

C0.52\(\Omega\)

D0.13\(\Omega\)

E1.50\(\Omega\)

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Question 1139

jamb 1982

A heater marked 50W will evaporate 0.005kg of boiling water in 50 seconds. The specific latent heat of vaporization of water in J/kg is

A5.0 x 10⁶

B1.0 x 10⁶

C2.5 x 10⁶

D2.5 x 10⁵

E5.0 x 10⁵

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Question 1140

jamb 1982

Which of the following statements is true of a body which is moving in a straight line with uniform acceleration? The velocity of the body

Ais also uniform

Bmust always be zero when the body stops accelerating

Cwill increase with time in the direction of the acceleration

Dis equal to the quotient of distance travelled and time

Eis the product of the distance travelled and time

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Question 1141

jamb 1982

A rocket burns 0.01kg of fuel each second and ejects it as a gas with a velocity of 5,000m/s. What force does the gas exert on the rocket?

A500,000N

B500N

C50N

D5,000N

E50,000N

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Question 1142

jamb 1982

Which of the following statements is NOT true of \(\gamma\)-rays?

A\(\gamma\)-rays belong to the electromagnetic spectrum

B\(\gamma\)-rays do not carry an electron charge

C\(\gamma\)-rays obey the inverse cube law in air

Dthe thickness of aluminium which stops b-particule has a negligible effect on \(\gamma\)-radiation

Ethe difference between \(\gamma\)-rays and X-rays is that \(\gamma\)-rays originate from energy charges in the nuclei of atoms, while X-rays comes from energy charges associated with the electron structure of atoms

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Question 1143

jamb 1982

As a positively charge rod is brought nearer to the top cap of a positively charged gold leaf electroscope, the divergence of the leaves will

Adecrease to zero

Bsteadily increase

Cdecrease to zero and then increase

Dremain constant

Eincrease to a maximum and then decrease

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Question 1144

jamb 1982

In copper plating, a current of 0.5A is allowed for cathode area of 100cm2. If this current is maintained constant for 100 minutes, the thickness of the copper deposited will be approximately (the electrochemical equivalent of copper = 0.0003g/oC, density of copper = 10^4g/cm3 )

A10^-2mm

B10^-3mm

C10^-4mm

D10^-5mm

E10^-6mm

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Question 1145

jamb 1982

If the refractive index of a medium is \(\sqrt{2}\), what is the critical angle?

A45^o

B50^o12'

C56^o25'

D75^o

E90^o

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Question 1146

jamb 1982

A rod of length 10cm is heated through 100^oC and its final length is 10.26cm. What is the co-efficient of linear expansion of the rod?

A0.026 per degree centigrade

B0.00026 per degree centigrade

C0.26 per degree centigrade

D1.0026 per degree centigrade

E0.0026 per degree centigrade

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Question 1147

jamb 1982

Why does a piece of cork float on water?

Athere is no upthrust on it when completely immersed in water

Bthe upthrust on it when completely immersed in water is greater than its weight in air

Cthe upthrust on it when completely immersed in water is less than its weight in air

Dits specific gravity is greater than that of water

Eits specific gravity is the same as that of water

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Question 1148

jamb 1982

The combination of sound waves with different frequencies is known as

Ainterference

Bdiffraction

Csuperposition

Dforced vibration

Eresonance

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Question 1149

jamb 1982

An object 15cm high is 30cm from pin-hole camera. If the height of the image formed at the back of the camera is 10cm, the image distance is

A20cm

B45cm

C54cm

D63cm

E70cm

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Question 1150

jamb 1982

250g of lead at 170^oC is dropped into 100g of water at 0^oC. If the final temperature is 12^oC, the specific heat of lead is (specific heat of water is 4,200J/kg^oC)

A39.5J/kg^oC

B50.4J/kg^oC

C127.6J/kg^oC

D154.6J/kg^oC

E173.4J/kg^oC

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