NECO SSCE - Physics - 2009 (Objective)

The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth?

1.92N

2.88N

6.72N

8.00N

12.00N Resposta correta

Detalhes da Resposta

Ler a nota de aula em Gravitational Field (JAMB)

Gravitational Field

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Pergunta 8 Relatório

Which of the following phenomena is responsible for the spherical shape of soap bubbles?

Adhesion

Capillarity

Cohesion

Osmosis

Surface tension Resposta correta

Detalhes da Resposta

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Pergunta 9 Relatório

A sound wave from a ship is received 8.4s later. What is the depth of the sea? [Speed of sound in water 1500ms^-1]

0.179km

0.357km

3.150km

6.300km Resposta correta

12.600km

Detalhes da Resposta

Ler a nota de aula em Current Electricity (JAMB)

Current Electricity

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Pergunta 10 Relatório

Which of the following substances undergoes sublimation?

Ether

Ice

Iodine Resposta correta

Naphthalene

Turpentine

Detalhes da Resposta

Ler a nota de aula em Change Of State (JAMB)

Ler a nota de aula em Vapours (JAMB)

Change Of State

Vapours

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Pergunta 11 Relatório

An immersion heater is rated 1500W. How long does it take the heater to raise the temperature of 1 kg of water by 30°C? (Assume heat lost to the surrounding is negligible, Specific heat capacity of water 4200Jkg^-1K^-1)

84s Resposta correta

112s

130s

168s

280s

Detalhes da Resposta

Ler a nota de aula em Heat Energy (WAEC)

Heat Energy

Ver Resposta

Pergunta 12 Relatório

Which of the following statements is correct about light and sound waves? Both

are longitudinal waves

are transverse waves

have the same velocity in air

need a medium for propagation

transmit energy Resposta correta

Detalhes da Resposta

Ler a nota de aula em Description Property Of Fields (WAEC)

Ler a nota de aula em Sound Waves (WAEC)

Description Property Of Fields

Sound Waves

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Pergunta 13 Relatório

Two forces of magnitude 8N and 4N act at right angle to each other. The angle between the resultant and the 8N force is

23.9°

26.6° Resposta correta

29.5°

60.0°

63.4°

Detalhes da Resposta

Ler a nota de aula em Equilibrium Of Forces (WAEC)

Equilibrium Of Forces

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Pergunta 14 Relatório

An object of mass 2kg moves for 5s with a uniform velocity of 10ms. What is the magnitude of its acceleration in ms^-2?

zero Resposta correta

2.5

12.5

100

Detalhes da Resposta

Ler a nota de aula em Newton’s Laws Of Motion (WAEC)

Newton’s Laws Of Motion

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Pergunta 15 Relatório

A ball of mass 100g falls from a height of 5m onto a concrete floor and rebounds to a height of 3m. Calculate the energy lost. (g = 10ms^-2)

2J Resposta correta

20J

100J

1000J

2000J

Detalhes da Resposta

Ler a nota de aula em Energy (WAEC)

Ler a nota de aula em Work, Energy And Power (WAEC)

Energy

Work, Energy And Power

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Pergunta 16 Relatório

Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is

conical

cubical

cylindrical Resposta correta

parabolic

spherical

Detalhes da Resposta

Ler a nota de aula em Electrostatics (JAMB)

Electrostatics

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Pergunta 17 Relatório

Arrange the following in the order of their increasing frequency.

I. Visible light
II. Gamma rays
III. Radio waves
IV. Infra-red radiation
V. Ultra-violet radiation

I, II, III, IV, V

II, III, IV, V, I

III, IV, V, I, II

IV, III, I. V, II

III, IV, I,V, II Resposta correta

Detalhes da Resposta

Ler a nota de aula em Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum (WAEC)

Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum

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Pergunta 18 Relatório

When a resistor of resistance R is connected across a.c. the terminal p.d. of the cell is reduced to three-quart its e.m.f. The cell’s internal resistance in terms of R is

\(\frac{R}{4}\) Resposta correta

\(\frac{R}{3}\)

\(\frac{R}{2}\)

2\(\frac{R}{3}\)

Detalhes da Resposta

Ver Resposta

Pergunta 19 Relatório

The phenomenon of photoelectric effect is used in the following EXCEPT

automatic doors

bugler alarm

electric fire alarm

sound production from film tracks Resposta correta

television cameras

Detalhes da Resposta

Ler a nota de aula em Structure Of The Atom (Nigeria Only) (WAEC)

Ler a nota de aula em Electromagnetic Field (Part 2) (WAEC)

Structure Of The Atom (Nigeria Only)

Electromagnetic Field (Part 2)

Ver Resposta

Pergunta 20 Relatório

A series RLC circuit is said to resonate, when

capacitive reactance is zero

conductance is maximum

current is minimum

impedance is minimum Resposta correta

inductive reactance is zero

Detalhes da Resposta

Ler a nota de aula em Capacitors (JAMB)

Ler a nota de aula em Scalars And Vectors (JAMB)

Ler a nota de aula em Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Ler a nota de aula em Simple A.C Circuits (JAMB)

Ler a nota de aula em Introductory Electronics (JAMB)

Capacitors

Scalars And Vectors

Properties Of Waves: Reflection, Refraction, Diffraction

Simple A.C Circuits

Introductory Electronics

Ver Resposta

Pergunta 21 Relatório

Two images Y and X are formed by a plane mirror and a convex mirror respectively. Which of the following is correct about their characteristics?

Both are inverted

The magnification of Y is greater than one while that of X is one

The magnification of Y is one while that of X is less than one Resposta correta

Y is inverted while X is erect

Y is real while X is virtual.

Detalhes da Resposta

Ler a nota de aula em Simple A.C. Circuits (WAEC)

Ler a nota de aula em Reflection Of Light At Plane And Curved Surfaces (JAMB)

Simple A.C. Circuits

Reflection Of Light At Plane And Curved Surfaces

Ver Resposta

Pergunta 22 Relatório

The work done in extending a spring by 40 mm is 1.52J. Calculate the elastic constant of the spring.

38.8 Nm^-1

60.8 Nm^-1

190.0 Nm^-1

1900.0 Nm^-1 Resposta correta

3800.0 Nm^-1

Detalhes da Resposta

Ler a nota de aula em Elasticity (JAMB)

Elasticity

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Pergunta 23 Relatório

An observer heard the sound of thunder 5.8s after the lightning flash was seen. How far was he from the source? [Speed of sound in air = 330ms^-1]

957m Resposta correta

1914m

3828m

8700m

17400m

Detalhes da Resposta

Ler a nota de aula em Motion (JAMB)

Motion

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Pergunta 24 Relatório

A transformer has an efficiency of 92.5%. the ratio number of turns in the primary coil to that in the secondary coil is 128 : 45. If the current passing through the secondary coil is 9.0A, calculate the current passing through the primary-coil.

2.93A

3.16A

3.42A Resposta correta

25.60A

27.68A

Detalhes da Resposta

Ler a nota de aula em Simple A.C. Circuits (WAEC)

Ler a nota de aula em Elementary Modern Physics (JAMB)

Simple A.C. Circuits

Elementary Modern Physics

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Pergunta 25 Relatório

A plane progressive wave is represented by the equation y = 0.2sin (200πt - 0.5.x) where x and y are measured in cm and t in s. What is the frequency of the wave?

0.5Hz

4.0Hz

10.0Hz

100.0Hz Resposta correta

200.0Hz

Detalhes da Resposta

Ler a nota de aula em Elementary Modern Physics (JAMB)

Elementary Modern Physics

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Pergunta 26 Relatório

Determine the value of x from the nuclear reaction below,

\(^{222}_{86}Rn\) → \(^{x}_{88}Ra\) + 2β + energy

220

222 Resposta correta

224

226

228

Detalhes da Resposta

Ler a nota de aula em Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

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Pergunta 27 Relatório

Calculate the heat energy lost when 10g of boiling water changes to ice at 0°C. [Specific latent heat of ice 336Jg^-1 . Specific heat capacity of water 4.2Jg^-1 K^-1]

840J

3360J

3420J

4200J

7560J Resposta correta

Detalhes da Resposta

Ler a nota de aula em Heat Energy (WAEC)

Heat Energy

Ver Resposta

Pergunta 28 Relatório

In which of the following fields is repulsion NOT experienced?

Electrical only

Gravitational only Resposta correta

Magnetic only

Magnetic and electrical

Magnetic and gravitational

Detalhes da Resposta

Ler a nota de aula em Electric Field (WAEC)

Ler a nota de aula em Gravitational Field (JAMB)

Electric Field

Gravitational Field

Ver Resposta

Pergunta 29 Relatório

Which of the following pairs of phenomena helps in the resolution of the wave-particle paradox of matter?

Compton effect and thermionic emission

Electron diffraction and refraction

emission and absorption of light Resposta correta

Interference and polarization

Reflection and photoelectric effect

Detalhes da Resposta

Ler a nota de aula em Wave-particle Paradox (WAEC)

Wave-particle Paradox

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Pergunta 30 Relatório

A ball of mass 0.1kg moving with velocity of 20ms-1 is hit by a force which acts on it for 0.02s. If the ball moves off in the opposite direction with a velocity of 25ms-1 , calculate the magnitude of the force.

25N Resposta correta

100N

125N

225N

250N

Detalhes da Resposta

Ler a nota de aula em Newton’s Laws Of Motion (WAEC)

Ler a nota de aula em Work, Energy And Power (WAEC)

Newton’s Laws Of Motion

Work, Energy And Power

Ver Resposta

Pergunta 31 Relatório

The equation P^xV^yT^z = Constant is Charles’ law if

x = 0, y = 1 and z = -1 Resposta correta

x = 0, y = -1 and z = 1

x = 1, y = 1 and z = 0

x = 1, y = 1 and z = -1

x = 1, y = 1 and z = 1

Detalhes da Resposta

Ler a nota de aula em Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

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Pergunta 32 Relatório

The electric potential at a distance d from a point charge q in air of permittivity eo is expressed as?

q² ÷ 4πe_od

q² ÷ 4πe_o

q ÷ 4πe_od²

q ÷ 4πe_od Resposta correta

q ÷ 4πe_o²d

Detalhes da Resposta

Ler a nota de aula em Electrostatics (JAMB)

Electrostatics

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Pergunta 33 Relatório

In the electrical method of making a magnet, the polar the magnet formed depends on the

amount of current passed

direction of the current Resposta correta

nature of the material used

orientation of the magnetic material in space

size of the magnetic material

Detalhes da Resposta

Ver Resposta

Pergunta 34 Relatório

Inertia is the property of a body which makes the body to

accelerate

be reluctant to move when at rest Resposta correta

experience friction when moving

move randomly

retard

Detalhes da Resposta

Ler a nota de aula em Newton’s Laws Of Motion (WAEC)

Ler a nota de aula em Motion (JAMB)

Newton’s Laws Of Motion

Motion

Ver Resposta

Pergunta 35 Relatório

The term torque means

the equilibrant of two concurrent forces

the moment of a force about an ads Resposta correta

the resultant of several forces acting on a body in equilibrium

two coplanar forces at right angle to each other

two equal and opposite forces whose lines of action do not coincide

Detalhes da Resposta

Ler a nota de aula em Scalars And Vectors (JAMB)

Ler a nota de aula em Equilibrium Of Forces (WAEC)

Scalars And Vectors

Equilibrium Of Forces

Ver Resposta

Pergunta 36 Relatório

Two forces A and B act at a point. If their resultant is [given by] (B - A) in the direction of B, then

A and B are equal

A is greater than B

the angle between A and B is 0°

the angle between A and B is 90°

the angle between A and B is 180° Resposta correta

Detalhes da Resposta

Ler a nota de aula em Scalars And Vectors (JAMB)

Ler a nota de aula em Equilibrium Of Forces (WAEC)

Scalars And Vectors

Equilibrium Of Forces

Ver Resposta

Pergunta 37 Relatório

Which of the following statements about water is NOT correct?

Pure water freezes at 0°C under normal pressure

The volume of a given mass of water at 0° is less than its volume at 4°C Resposta correta

Water boils at a definite temperature

Water evaporates at all temperatures

Water has its maximum density at 4°C

Detalhes da Resposta

Ler a nota de aula em Change Of State (JAMB)

Change Of State

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Pergunta 38 Relatório

Which of the following statements is correct about volatile liquids? They have

low boiling point Resposta correta

Low evaporating rate

high conductivity

high density

high viscosity

Detalhes da Resposta

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Pergunta 39 Relatório

A body accelerating will have a constant speed if it is

falling from a height

in equilibrium

moving in a circular path Resposta correta

moving in a straight line

oscillating

Detalhes da Resposta

Ler a nota de aula em Scalars And Vectors (WAEC)

Ler a nota de aula em Rectilinear Acceleration (WAEC)

Scalars And Vectors

Rectilinear Acceleration

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Pergunta 40 Relatório

A body executing simple harmonic motion has an angular speed of 2π radians. Its period of oscillation is (π 3.14).

0.05s

1.00s Resposta correta

2.00s

3.14s

6.28s

Detalhes da Resposta

Ler a nota de aula em Simple Harmonic Motion (WAEC)

Simple Harmonic Motion

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Pergunta 41 Relatório

Which of the following statements about a gas is NOT correct?

It has no definite shape

It is compressible

Its molecules are closely packed Resposta correta

Its molecules gain kinetic energy when heated

Its molecules move about randomly

Detalhes da Resposta

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Pergunta 42 Relatório

The defect of the eye lens which occurs as a result of weak ciliary muscles is called

astigmatism

hypermetropia

myopia

presbyopia Resposta correta

spherical aberration

Detalhes da Resposta

Ler a nota de aula em Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

Ver Resposta

Pergunta 43 Relatório

An effort P applied at one end of a crowbar just overcomes the resistance W at the lid of a tin. The mechanical advantage of the crowbar is expressed as

W + P

P - W

\(\frac{w}{p}\) Resposta correta

\(\frac{p}{w}\)

Detalhes da Resposta

Ler a nota de aula em Simple Machines (JAMB)

Simple Machines

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Pergunta 44 Relatório

The space between the two walls of a vacuum flask is completely evacuated to reduce heat loss by

condensation

conduction