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46 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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46 questions

Question 1 of 20 46 total questions

Question 1

jamb 1986

fig 1 is a graph of force against extension for a spiral spring, the force constant of the spring is given by the

Aslope of the linear prtion of the graph

Blength of the linear portion of the graph

Carea under the linear portion of the graph

Darea under the entire graph

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Question 2

jamb 1986

A uniform meter rule QR is balanced on a knife edge which is 55cm from R, when a mass of 10g is hung at P as shown above, the mass of the meter rule is

A550g

B350g

C70g

D35g

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Question 3

jamb 1986

In fig 3, three forces F1, F2, and F3 acting at O are in equilibrium. If the magnitude of F1 is 10N,and the magnitude of F2 is 5N, find the magnitude of F3

A26.4N

B15.0N

C13.2N

D10.0N

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Question 4

jamb 1986

fig 4 represents a block-and-tackle pulley system on which an effort of W newtons supports a load of 120.0N if the efficiency of the system is 40% then the value of W is

A28.0N

B48.0N

C50.0N

D288.0N

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Question 5

jamb 1986

In an experiment in which molten naphthalene is allowed to cool, the cooling curve in fig 5 was obtained, the temperature \( 80^{\circ}C \) is known as

Acooling temperature

Bboiling point

Cmelting point

Dvaporization point

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Question 6

jamb 1986

In fig 6, a ray of light in air strikes a glass plate at an angle of incidence 60 degrees, the reflected ray is observed to be perpendicular to the refracted ray, what is the refractive index of the glass

A1.73

B1.50

C0.87

D0.57

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Question 7

jamb 1986

if the fig above E is an accumulator with negligible internal resistance. and the EMF 9.0V, The the total current is

A0.3A

B0.8A

C1.0A

D1.8A

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Question 8

jamb 1986

In fig 9 the value of R is

A3Ω

B4Ω

C5Ω

D6Ω

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Question 9

jamb 1986

When a box of mass 45kg, is given an initial speed of 5ms^-1 it slides along a horizontal floor a distance of 3m before coming to a rest. what is the coefficient of kinetic friction between the box and the floor? (G = 10ms^-2)

A\( \frac{5}{6} \)

B\( \frac{5}{12} \)

C\( \frac{1}{3} \)

D\( \frac{2}{3} \)

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Question 10

jamb 1986

Which of the following is most strongly deflected by magnetic field?

A\(\gamma\) - rays

BX- particle

C\(\beta\) - particles

DX - rays

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Question 11

jamb 1986

The wavelength of ultraviolet radiation is 400nm. If the speed of light in air is 3 x 10\(^8\)ms\(^{-1}\), then the frequency of the ultraviolet radiation is

A1.3 x 10¹⁵Hz

B7.5 x 10⁵Hz

C1.2 x 10¹¹Hz

D7.5 x 10¹⁴Hz

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Question 12

jamb 1986

If the inclination at Ibadan is 7^oS, this means that

Athe angle between the geographic meridian and the magnetic meridian at Ibadan is 7^o

Bthe earth's magnetic intensity at Ibadan makes angle 7^o with the horizontal direction

Ca magnetic needle will be inclined at 7^o to the vertical at Ibadan

Dthe north pole of a magnetic needle dips downward at Ibadan

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Question 13

jamb 1986

The sign of the change on a charged glass rod may be determined with

Aa charged electroscope

Ban uncharged electroscope

Ca galvanometer

Dan electrometer

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Question 14

jamb 1986

The angle between the magnetic meridian and the geographic meridian at a locality on the earth is the

Alongitude of the locality

Bangle of inclination at the locality

Clatitude of the locality

Dangle of declination of the locality

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Question 15

jamb 1986

Which of the following is true of magnetism?

AIron fillings cling mainly round the ends of a bar magnet

BThe freely suspended bar magnet comes to rest in the geographic north-south direction

CLike poles attract

DIodestone is a non-magnetic oxide

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Question 16

jamb 1986

Which of the following is stored by a dry Leclanche cell?

AElectrical power

BKinetic energy

CElectric current

DChemical energy

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Question 17

jamb 1986

Which of the following is NOT a part of a d.c. electric motor?

AField-magnet

BArmature

CCommutator

DTransformer

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Question 18

jamb 1986

The vibration of an air column produces the sound in the

Apiano

Bguiter

Cflute

Dschool handbell

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Question 19

jamb 1986

A man clapping his hands at regular intervals observes that the echo of a clap coincides with the next clap. If the reflecting cliff is 160m away and the speed of sound is 320ms^-1, what is the frequency of the clapping?

A1 Hz

B2Hz

C4Hz

D8Hz

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Question 20

jamb 1986

Which of the following is true of the loudness of sound? It

Adepends on the square of the amplitude of the vibrating body

Bis proportional to the distance of the observer from the source of the sound

Cis greatest in vacuum

Dis dependent in vacuum

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