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4,719 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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4,719 questions

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Question 711

jamb 2014

Calculate the escape velocity of a satellite launched from the earth's surface if the radius of the earth is 6.4x10⁶m

A25.3kms^-1

B4.2kms^-1

C4.0kms^-1

D11.3kms^-1

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Question 712

jamb 2014

A car accelerates uniformly from rest at 3ms^-2. its velocity after traveling a distance of 24m is

A12ms^-1

B144ms^-1

C72ms^-1

D36ms^-1

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Question 713

jamb 2014

Which type of motion do the wheels of a moving car undergo?

AVibratory and translational motion

BRandom and translational motion

CRotational mand oscillatory motion

DTranslational and rotational motion

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Question 714

jamb 2014

I Electrical potential, II Torque, III Kinetic Energy, IV Momentum. Which of the quantities listed are vectors?

AII and IV

BI and II

CI and III

DII and III

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Question 715

jamb 2014

A quantity which requires magnitude and direction to be specified is

ATemperature

BDistance

CDisplacement

DMass

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Question 716

jamb 2014

What is the least possible error encountered when taking measurement with a meter rule?

A0.1mm

B1.0mm

C0.5mm

D0.2mm

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Question 717

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 718

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 719

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 720

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 721

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 722

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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Question 723

waec 2013

Which of the following statements about the use of radioisotopes is not correct? They are used to

Ainduce mutations in plants and animals to obtain new and improved varieties

Btrace the paths of metabolic processes in plants and animals

Cestmate the age of rocks

Dlocate broken bones

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Question 724

waec 2013

Which of the following particles are termed nucleons in a neutral atom?

Aprotons and neutrons

Bneutrons and electrons

Cprotons and electrons

Dprotons, electrons and neutrons

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Question 725

waec 2013

The minimum energy required to cause photoelectric emission when the surface of a metal is irradiated with electromagnetic radiation of suitable frequency is called

Acritical energy

Bionization energy

Cwork function

Dplanck's constant

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Question 726

waec 2013

The work function of a metal is 2.56 x 10^-19J. Calculate the frequency of a photon whose energy is required to eject from the metal an electron with kinetic energy of 3.0ev. [1 eV = 1.6 x 10^-19J, h = 6.6 x 10^-34Js]

A5.56 x 10¹⁹Hz

B1.66 x 10¹⁹Hz

C1.12 x 10¹⁵Hz

D8.42 x 10¹⁴Hz

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Question 727

waec 2013

A coil of inductance 0.12 H and resistance 4\(\Omega\), is connected across a 240V, 50Hz supply. Calculate the current through it. [\(\pi\) = 3.142]

A6.3A

B33.3A

C37.2A

D40.0A

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Question 728

waec 2013

Which of the following devices does not makes use of eddy current for its action? A/An

Agalvanometer

Bspeedometer

Cinduction furnace

Dinduction coil.

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Question 729

waec 2013

The capacitance of parallel plates capacitors varies

Ainversely as the square of the distance between the plates

Bdirectly as the square of the distance between the plates

Cinversely as the distance between the plates

Ddirectly as the distance between the plate

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Question 730

waec 2013

Which of the following instruments is used to determine the accurate value of the electromotive force of a cell?

Avoltmeter

Bmeterbridge

Cvoltameter

Dpotentiometer

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