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

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4,719 questions

Question 1 of 20 4,719 total questions

Question 731

waec 2013

A body of mass 11kg is suspended from a ceiling fan by an aluminum wire of length 2m and diameter 2mm. Calculate the elastic energy stored in the wire [Young's modulus of aluminum is 7.0 x \(10^10Nm^{-2}\), g = 10m\(s^{-2}\), \(\pi\) = 3.142]`

A1.1 x 10^-1J

B5.5 x 10^-2J

C1.1 x 10^-4J

D5.5 x 10^-8J

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Question 732

waec 2013

From Newton's first law of motion,

Aa body can only undergo translational motion

Bonce a body remains at rest no force acts on it

Cthe net force acting in uniform linear motion is zero

Da body's inertia is its weight

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Question 733

waec 2013

The maximum displacement on either side of the equilibrium position of an object in simple harmonic motion represents

Aperiod

Bamplitude

Cwavelength

Dfrequency

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Question 734

waec 2013

A body of mass 20g projected vertically upwards in vacuum returns to the point of projection after 1.2s. [g = 10ms^-2]. Determine the potential energy of the body at the maximum height of its motion

A0.36J

B0.72J

C360.00J

D720.00J

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Question 735

waec 2013

A body of mass 20g projected vertically upwards in vacuum returns to the point of projection after 1.2s. [g = 10ms\(^{-2}\)]. Calculate the speed of projection

A1.2ms^-1

B6.0ms^-1

C12.0ms^-1

D0.6ms^-1

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Question 736

waec 2013

The total area under a force-velocity graph represents

Aenergy

Bmomentum

Cpower

Dpressure

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Question 737

waec 2013

A body of mass 2kg is released from rest on a plane inclined at an angle of 60° to the horizontal. Calculate the acceleration of the body down the plane.[g = 10ms\(^{-2}\)]

A3.1ms^-2

B5.2ms^-2

C6.0ms^-2

D8.7ms^-2

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Question 738

waec 2013

The slope of a linear distance-times graph represents

Aacceleration

Bdisplacement

Cspeed

Dvelocity

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Question 739

waec 2013

Solid friction, like viscosity is

Aindependent of the surface area in contact

Bindependent of the relative motion between layers

Cdependent on normal reaction

Din opposition to motion

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Question 740

waec 2013

Which of the following statements about pressure in a liquid is correct?

Athe pressure in a liquid increases with depth

Bthe higher the density of a liquid, the lower the pressure it exerts

Cpressure in liquid act only in a direction perpendicular to the sides of the containing vessel

Dpressure is independent of the acceleration due to gravity

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Question 741

waec 2013

Which of the following units is equivalent to the watt?

Akgms^-2

Bkgm²s^-3

Ckgm²s^-2

Dkgm²s^-1

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Question 742

waec 2013

The rising of a liquid in an open and ended glass tube of narrow bore is

Aosmosis

Badhesion

Ccapillarity

Dsurface tension

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Question 743

jamb 2013

The bond between silicon and germanium is

Adative

Bcovalent bond

Ctrivalent

Dionic

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Question 744

jamb 2013

The energy of a photo having a wavelength of 10^-10m is
(h= 6.63 x 10 ^-34Js, c =3.0 x 10 ⁸ms^-1)

A2.0 x 10 ^-15J

B1.7 x 10 ^-13J

C2.0 x 10 ^-12J

D1.7 x 10 ^-12J

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Question 745

jamb 2013

The particle nature of light is demonstrated by the

Aphotoelectric effect

Bspeed of light

Ccolours of light

Ddiffraction of light

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Question 746

jamb 2013

In photo-emission, the number of photo-electrons ejected per second depends on the?

Afrequency of the beam

Bwork function of the metal

Cthreshold frequency of the metal

Dintensity of the beam

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Question 747

jamb 2013

Calculate the energy of the third level of an atom if the ground state energy is - 24.8eV

A-9.20eV

B-8.20eV

C-2.75eV

D-1.75eV

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Question 748

jamb 2013

If a current of 2.5A flows through an electrolyte for 3 hours and 1.8g of a substance is deposited, what is the mass of the substance that will be deposited if a current of 4A flows through it for 4.8 hours?

A2.4g

B3.2g

C4.6g

D4.8g

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Question 749

jamb 2013

Induced emfs are best explained using

AOhm's law

BFaraday's law

CColomb's law

DLenz's law

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Question 750

jamb 2013

To convert a galvanometer to a voltmeter, a

Ahigh resistance is connected to it in series

Bhigh resistance is connected to it in parallel

Clow resistance is connected to it in parallel

Dlow resistance is connected to it in series

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