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1,904 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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1,904 questions

Question 1 of 20 1,904 total questions

Question 291

waec 2014

The S.I unit of power is

BPa

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Question 292

waec 2014

A device that converts mechanical energy into electrical energy is

Aa dynamo

Ban electric motor

Can induction coil

Da transformer

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Question 293

waec 2014

Alcohol of mass 21g and density 0.7g cm^-3 is mixed with 10g of water. Determine the density of the mixture [density of water = 1.0gcm^-3]

A0.775gcm^-3

B0.875gcm^-3

C0.780gcm^-3

D0.880gcm^-3

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Question 294

waec 2014

The period of a simple pendulum X is 5s. What is the period of a simple pendulum Y which makes 50 vibrations in the same time it takes X to make 20 vibrations?

A12.5s

B2.5s

C2.0s

D1.2s

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Question 295

waec 2014

The diagram above illustrates a uniform metre rule which is balanced on a pivot by some masses. Calculate the value of M

A500.0g

B400.0g

C44.4g

D25.0g

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Question 296

waec 2014

A car starts from rest and covers a distance of 40m in 10s. Calculate the magnitude of its acceleration

A0.25ms^-2

B0.80ms^-2

C3.20ms^-2

D4.00ms^-2

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Question 297

waec 2014

A body is projected vertically upwards with a speed of 10 ms^-1 from a point 2m above the ground. Calculate the total time taken for the body to reach the ground. [g = 10ms^-2]

A1.00s

B2.00s

C2.18s

D3.00s

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Question 298

waec 2014

The knowledge of surface tension is applied in the following areas except in

Amanufacturing of rain coats

Bproduction of palm oil

Cfloating of a needle on water

Dwashing of plates with soapy water

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Question 299

waec 2014

Which of the following pairs of physical quantities is made up of vectors?

Aspeed and displacement

Bmass and force

Cdislacement and acceleration

Dmomentum and length

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Question 300

waec 2014

If no net force acts on an object, the object maintains a state of rest or constant speed in a straight line. The above is a statement of Newton's

Afirst law of motion

Bsecond law of motion

Cthird law of motion

Dlaw of universal gravitation

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Question 301

waec 2014

When the linear momentum of a body is constant, the net force acting on it

Ais zero

Bincreases

Cdecreases

Dremains constant

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Question 302

waec 2014

When an elastic material is stretched by a force, the energy stored in it is

Akinetic

Bpotential

Cthermal

Delectrical

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Question 303

waec 2014

An object of mass m moves with a uniform speed v round a circular path of radius r. If its angular speed is \(\omega\), the magnitude of the centripetal force acting on it is

A\(m \omega^2 r\)

B\(\frac{mv^2}{r}\)

C\(m \omega r\)

D\(\frac{mv^2}{r^2}\)

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Question 304

waec 2014

A ball falling through a viscous liquid is acted upon by

Aupthrust only

Bupthrust and the ball's weight

Cthe ball's weight and viscous force

Dupthrust, the ball's weight and viscous force

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Question 305

waec 2013

An electric circuit is connected as illustrated above. Determine the equivalent e.m.f and current flowing through the circuit respectively, neglecting the internal resistance of the cells

A2V, 1.0A

B2V, 4.0A

C6V, 0.3a

D6V, 3.0a

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Question 306

waec 2013

The diagram above illustrates a waveform. Which of the point on the waveform are in phase?

AP and R

BR and T

CP and T

DQ and S

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Question 307

waec 2013

The outlet of a bicycle pump is used to inflate a football as illustrated in the diagram above. Why does the pressure of the air inside the pump increases as the pump handle is slowly pushed downward at constant temperature?

Amomentum of the air molecules are increased

Bvolume occupied by the molecules are increased

Cfrequency of collision of the air molecules with the walls of the pump is increased

Dmore air molecules are collidin with one another in the system

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Question 308

waec 2013

Four co-planar forces of magnitudes 10N, 17N, 6N and 20N act at point O as shown in the above diagram. Determine the magnitude of the resultant force

A53.N

B21.0N

C7.0N

D5.0N

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Question 309

waec 2013

A block of wood of mass 5kg is pulled on a platform by a force of 40N as illustrated in the diagram above. If the frictional force, F experienced by the block is 12N, calculate the magnitude of the acceleration of the acceleration of the block

A2.4ms^-2

B5.6ms^-2

C8.0ms^-2

D2.4ms²

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Question 310

waec 2013

Which of the following phenomena supports the theory that waves have a particle nature?

Aelectron diffraction

Bphotoelectric effect

Cdiffraction of light

Dx-ray interference

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