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45 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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Past Questions

45 questions

Question 1 of 20 45 total questions

Question 1

jamb 1982

a body of mass 10kg on a smooth inclined plane is connected to a smooth pulley to a mass of 15kg as shown above, the acceleration of the system is

A\(\frac{1}{4}\)g

B\(\frac{8}{25}\)g

C\(\frac{1}{2}\)g

D\(\frac{2}{5}\)g

E\(\frac{3}{4}\)g

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Question 2

jamb 1982

Two mirrors of the same length are arranged as shown above, a ray of light NO strikes the system at O and emerges along PQ. The emergent ray has been deviated through

A220 degrees

B200 degrees

C210 degrees

D180 degrees

E230 degrees

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Question 3

jamb 1982

The value of the series resistor required to convert the above galvanometer into a voltmeter with a full range deflection of 15V is

A985 ohms

B990 ohms

C995 ohms

D1000 ohms

E1005 ohms

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Question 4

jamb 1982

A Uniform beam PQ of mass 20kg and length 5m is balanced as shown above, a man of weight 800N stands at M such that QM = 2m. The reaction at P and Q respectively are(take g = 10ms-2)

A300N and 500N

B420N and 580N

C220N and 380N

D580N and 420N

E382N and 220N

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Question 5

jamb 1982

A body is acted upon by forces applied at points P and Q as shown above their resultant is equal to

A2√5N in adirection N 56◦ E

B2√5N in adirection N 56◦ W

C2√13N in adirection N 56◦ E

D2√13N in adirection N 56◦ W

E√10N in adirection N 56◦ E

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Question 6

jamb 1982

what is the resultant resistance in the circuit given above

A11Ω

B8Ω

C4Ω

D3.6Ω

E4.3Ω

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Question 7

jamb 1982

what is the resultant capacity of the circuit

A1.5µF

B18.0µF

C6.0µF

D6.8µF

E8.83µF

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Question 8

jamb 1982

the arrow represents an object in front of a convex mirror whose focal points are X and Y. The image formed is

Abetween X and P

BBetween P and Y

CBetween Y and Z

DOutside W

EOutside Z

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Question 9

jamb 1982

in the image above, an incident ray XY makes an angle of 15\( ^{\circ} \) with a fixed line AY, which is normal to surface of a plane mirror if the mirror is turned as indicated by the arrow through \( 40^{\circ} \), what angle will the reflected ray make with AY

A\( 25^{\circ} \)

B\( 40^{\circ} \)

C\( 15^{\circ} \)

D\( 55^{\circ} \)

E\( 95^{\circ} \)

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Question 10

jamb 1982

The water manometer above is measuring the pressure of gas supply. if the specific gravity of mercury is 13.6 and the atmospheric pressure is 70cm of mercury what is the total pressure of the gas supply in cm of water

A67cm

B73cm

C949cm

D952cm

E955cm

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Question 11

jamb 1982

Two taxis leave benin and agbor some 80km apart at 1200hr as shown above. from the distance time graph shown the distance of their meeting point P, from Benin and the time of their meeting are

A27km, 1218hr

B29km, 1315hr

C40km, 1418hr

D53km, 1436hr

E60km, 1500hr

View Explanation & Discuss

Question 12

jamb 1982

In a radioactive series

\( ^{235} _{92}L \to ^{235} _{92}M \to ^{231} _{90}N \to ^{231} _{91}\phi \)

The particles emitted are respectively

A\( \beta , \beta , \alpha \)

B\( \alpha , \gamma , \beta \)

C\( \gamma , \alpha , \beta \)

D\( \alpha , \alpha , \beta \)

E\( \beta , \alpha , \beta \)

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Question 13

jamb 1982

A 10g mass placed on the pan of a spring balance causes an extension of 5cm. If a 15g mass is placed on the pan of the same spring balance, the extension is

A3.3cm

B6.5cm

C7.5cm

D10.8cm

E15.0cm

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Question 14

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 15

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

View Explanation & Discuss

Question 16

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 17

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 18

jamb 1982

The area under a force-distance graph represents

Aacceleration

Bvelocity

Cpower

Dwork

Emomentum

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Question 19

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

View Explanation & Discuss

Question 20

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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