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4,719 questions

Question 1 of 20 4,719 total questions

Question 1161

waec 2005

The frequency of a swinging pendulum is the

Anumber of complete oscillations the pendulum makes in a second

Bnumber of amplitudes the bob makes in a second

Cangle the bob swings through in a second

Ddistance the bob covers in a second

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Question 1162

waec 2005

A body starts from rest and accelerates uniformly at 5ms^-2 until it attains a velocity of 25ms-1. Calculate the time taken to attain this velocity

A2.5s

B5.0s

C10.0s

D125.0s

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Question 1163

waec 2005

Which of the following type of motion does a body undergo when acted upon by a couple?V

Avibrational

Btranslational

Crotational

Drandom

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Question 1164

waec 2005

Masses,m¹ and m² at the 20-cm and 65-cm marks respectively of a uniform metre rule freely suspended at its centre of gravity. If the metre rule balances horizontally, determine the ratio m² : m¹

A2 : 1

B3 : 3

C2 : 3

D1 : 2

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Question 1165

waec 2005

A wheel and axle of radii 800mm and 200mm respectively is used to raise a body of weight 800N by the application of 250N. Calculate the efficiency of the machine

A85%

B80%

C60%

D20%

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Question 1166

waec 2005

Which of the following simple machines is a second class lever?

Awheel barrow

Bcrowbar

Cclaw hammer

Dseesae

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Question 1167

waec 2005

A body of mass 25kg, moving at 3ms-1 on a rough horizontal floor, is at rest after sliding through a distance of 2.50m on the floor. Calculate the coefficient of sliding friction. [g = 10.0ms\(^{-2}\)]

A0.09

B0.18

C0.36

D0.54

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Question 1168

waec 2005

The friction which exists between two layers of liquid in relative motion is called

Acapillarity

Bsurface tension

Cviscosity

Dcohension

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Question 1169

waec 2005

Which of the following statements about a spring balance and/or a chemical balance is not correct?

Athe chemical balance operates on the principle of moments

Bthe sprin balance operates on Hooke's law

Ceither may be used to measure the weight of a substance

Dthe reading of a spring balance changes over the surface of the earth, while that of the chemical balance remaind constant

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Question 1170

waec 2005

Each of the following physical quantities is classified as a vector or a scalar quantity. Which of the classifications is correct?

Aelectric potential (Vector)

Bmomentum (scalar)

Cgravitational field intensity (scalar)

Dmagnetic flux density (vector)

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Question 1171

waec 2005

Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules?

ATranslational motion

Brotational motion

Cbrownian motion

Doscillatory motion

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Question 1172

jamb 2005

A motorcyclist traveling at 30ms\(^{-1}\) starts to apply his brakes when he is 50m from the traffic light that had just turned red. If he reached the traffic light, his decceleration is

A18 ms\(^{-2}\)

B10 ms\(^{-2}\)

C9 ms\(^{-2}\)

D5 ms\(^{-2}\)

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Question 1173

jamb 2005

The amount of energy released when 0.5kg of uranium is burnt completely is [c = 3 x 10\(^8\)m/s]

A1.5 x 10\(^8\)J

B4.5 x 10\(^8\)J

C1.5 x 10\(^{16}\)J

D4.5 x 10\(^{16}\)J

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Question 1174

jamb 2005

In the photoelectric effect, which of the following graphs correctly represents the graph of stopping potential Vo against frequency,f, of incident light?

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Question 1175

jamb 2005

An elastic material has a length of 36cm when a load of 40N is hung on it and a length of 45cm when a load of 60N is hung on it. The original length of the string is

A12cm

B20cm

C18cm

D15cm

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Question 1176

jamb 2005

If two inductors of inductances 3H and 6H are arranged in series, the total inductance is

A9.0H

B18.0H

C0.5H

D2.0H

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Question 1177

jamb 2005

A force of 200N acts between two objects at a certain distance apart. The value of the force when the distance is halved is

A400N

B200N

C100N

D800N

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Question 1178

jamb 2005

The velocity of sound in air will be doubled if it's absolute temperature is

AQuadrupled

BConstant

CHalved

DDoulbed

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Question 1179

jamb 2005

If the distance between two point charges its increased by a factor of four, the magnitude of the electrostatic force between them will be

A¹/₄ of its former value

B¹/₁₆ of its former value

C¹/₂ of its former value

D4 times its former value

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Question 1180

jamb 2005

The figure above shows three capacitors, 2μF, 3μF and 6μF connected in series. If the p.d across the system is 12V, the p.d, across the 6μF capacitor is

A4V

B12V

C2V

D6V

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