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2,483 questions

Question 1 of 20 2,483 total questions

Question 671

jamb 2003

A turning fork of frequency 340Hz is vibrated just above a cylindrical tube of height 1.2m. If water is slowly poured into the tube, at what maximum height will resonance occur.
[speed of sound in air = 340ms-1]

A0.95m

B0.60m

C0.50m

D0.45m

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Question 672

jamb 2003

TºC	0	5	10	15	20	40	60
S.V.P(mmHg)	4.58	6.51	8.94	12.67	17.50	55.10	149.00

The table above shows the saturation vapour pressure against temperature in a certain town. If the vapour pressure in this town at 20oC is 10mmHg, what is the relative humidity?

A170.0%

B57.0%

C17.5%

D10.0%

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Question 673

jamb 2003

A satellite is in a parking orbit if its period is

Aless than the period of the earth

Bmore than the period of the earth

Cequal to the period of the earth

Dthe square of the period of the earth

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Question 674

jamb 2003

A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends. If the fulcrum is at the center of gravity, the force that must be applied at its other end to keep it in horizontal equilibrium is

A15N

B20N

C30N

D60N

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Question 675

jamb 2003

A piece of stone attached to one end of a string is whirled round in a horizontal circle and the string suddenly cuts. The stone will fly off in a direction

Aperpendicular to the circular path

Bparallel to the circular path

Ctangential to the circular path

Dtowards the center of the circle

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Question 676

jamb 2003

The stylus of a phonograph record exerts a force of 7.7 x 10\(^{-2}\)N on a groove of radius 10\(^{-5}\)m. Compute the pressure exerted by the stylus on the groove

A2.45 x 10⁸ Nm^-2

B3.45 x 10⁸ Nm^-2

C4.90 x 10⁸ Nm^-2

D2.42 x 10⁸ Nm^-2

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Question 677

jamb 2003

Water does not drop through an open umbrella of silk materials unless the inside of the umbrella is touched. This is due to

Acapilarity

Bosmotic pressure

Cviscosity

Dsurface tension

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Question 678

jamb 2003

If an object just begins to slide on a surface inclined at 30^o to the horizontal,the coefficient of friction is

A√3

B^√3/₂

C¹/_√2

D¹/_√3

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Question 679

jamb 2003

A hose of cross-sectional area 0.5m² is used to discharge water from a water tanker at a velocity of 60ms^-1 in 20s into a container. If the container is filled completely, the volume of the container is

A240m³

B600m ³

C2400m ³

D6000m³

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Question 680

jamb 2003

The length of piece of glass block was measured by means of a vernier calliper as shown above. The length of the glass block is

A1.63 cm

B1.64 cm

C1.65 cm

D1. 66 cm

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Question 681

jamb 2003

A test tube of radius 1.0cm is loaded to 8.8g. If is placed upright in water, find the depth to which it would sink

A2.8cm

B5.2cm

C25.5cm

D28.0cm

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Question 682

jamb 2003

On top of a spiral spring of the force constant 500Nm^-1 is placed a mass of 5 x 10^-3 kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the mass is projected

A8 m

B4 m

C2 m

D1 m

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Question 683

jamb 2002

The colours seen on soap bubbles are due to

ADiffraction

BRefraction

CDispersion

DInterference

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Question 684

jamb 2002

If the total force acting on a particle is zero, the linear momentum will

AIncrease

BDecrease

CBe Constant

DIncrease then decrease

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Question 685

jamb 2002

A bead travelling on a straight line wire is brought to rest at 0.2 by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work done by the friction
[g = 10ms\(^2\)]

A2 x 10\(^{-4}\)

B2 x 10\(^{-3}\)

C2 x 10\(^{-1}\)

D2 x 10\(^2\)

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Question 686

jamb 2002

Which of the following statements is true of the properties of a moving coil galvanometer?

ATHe coil has a small area

BThere are strong hair springs to gives a large control panlel

CThere is a strong permanent magnet to give high magnetic flux

Dit has a small number of turns of coil

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Question 687

jamb 2002

A current of 0.5 A flowing 3h Deposits 2g of metal during electrolysis. The quantity of the same metal that would be deposited by the currents of 1.5A flowing in 1h is

A2g

B6g

C10g

D18g

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Question 688

jamb 2002

At what frequency would a capacitor of 2.5μF used in the radio circuit have a reactance of 250Ω

A\(\frac{π}{800}\) Hz

B\(\frac{800}{\pi}\) Hz

C200π Hz

D2000π Hz

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Question 689

jamb 2002

The carbon-granules microphone works on the principle of change in

Ainductance

Bresistance

Ccapacitance

Dvoltage

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Question 690

jamb 2002

A transistor is used in the amplification of signals because it

Acontrols the flow of current

Bconsumes a lot of power

Callows doping

Dcontains electron and hole carriers

View Explanation & Discuss

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