NECO SSCE - Physics - 2002 (Objective)

Pregunta 1 Informe

A brass cube of side 10cm is heated through 30°C. If the linear expansivity of brass is 2.0 × I0\(^{-5}\) K-1 , what is the increase in its volume?

0.06 cm³

0.18cm³

0.60cm³

1.20cm³

1.80cm³ Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Thermal Expansion (JAMB)

Thermal Expansion

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Pregunta 2 Informe

The silvered walls of a vacuum flask minimise loss of heat due to

conduction and convection

conduction only

convection and radiation

convection only

radiation only Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Heat Transfer (JAMB)

Lee la nota de la lección en Temperature And Its Measurement (JAMB)

Heat Transfer

Temperature And Its Measurement

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Pregunta 3 Informe

A negatively charged rod is brought near the cap of an electroscope. The cap is earthed momentarily while the charge is near to it. The rod is then removed. Which statement is correct?

The cap will be positively charged and the will be negatively charged

The cap will be negatively charged and the leaf will be positively changed

The cap and the leaf will be positively charged

The cap and the leaf will be negatively charged Respuesta correcta

none

Detalles de la respuesta

Lee la nota de la lección en Structure Of The Atom (Nigeria Only) (WAEC)

Lee la nota de la lección en Electrostatics (JAMB)

Structure Of The Atom (Nigeria Only)

Electrostatics

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Pregunta 4 Informe

If the refractive index of water is 1.33, what is the critical angle for a water-air boundary?

36.0 °

40.2 °

41.8 °

48.8 ° Respuesta correcta

62.7 °

Detalles de la respuesta

Lee la nota de la lección en Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Refraction Of Light Through Plane And Curved Surfaces

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Pregunta 5 Informe

An object 8cm in front of a plane mirror moves at a speed of 6cm s^-1 away from the mirror. What will be the distance separating the object and the image after 2s?

8cm

12cm

20cm

28cm

40cm Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Current Electricity (JAMB)

Lee la nota de la lección en Reflection Of Light At Plane And Curved Surfaces (JAMB)

Current Electricity

Reflection Of Light At Plane And Curved Surfaces

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Pregunta 6 Informe

The energy stored in a capacitor of capacitance 5 μF is 40J. What is the voltage applied across its terminals?

16V

200V

4000V Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Capacitors (JAMB)

Lee la nota de la lección en Current Electricity (JAMB)

Capacitors

Current Electricity

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Pregunta 7 Informe

A platinum-resistance thermometer has a resistance of 10 ω at 0°C and 18 ω at 100°C. Assuming that resistance changes uniformly with temperature, what is the resistance of the thermometer when the temperature is 45°C?

27.8

17.8

13.6 Respuesta correcta

6.4

3.6

Detalles de la respuesta

Lee la nota de la lección en Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

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Pregunta 8 Informe

A body of weight 20N displaces 12N of the liquid in which it is immersed. What is the upthrust of the liquid on the body?

240N

32N

20N

12N Respuesta correcta

Detalles de la respuesta

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Pregunta 9 Informe

What does NOT affect the rate of evaporation of a liquid

exposed surface area of the liquid

humidity of the surroundings

nature of the liquid

temperature the liquid

volume of the liquid. Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Vapours (JAMB)

Vapours

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Pregunta 10 Informe

Which is a fundamental unit?

ampere Respuesta correcta

joule

Newton

ohm

watt

Detalles de la respuesta

Lee la nota de la lección en Fundamental And Derived Quantities And Units (WAEC)

Fundamental And Derived Quantities And Units

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Pregunta 11 Informe

A body executing a simple harmonic motion has an angular velocity of 22 radians per second. If it has a maximum

1100ms^-1

440 ms^-1

220 ms^-1

22 ms^-1

2.2ms^-1 Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Simple Harmonic Motion (WAEC)

Simple Harmonic Motion

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Pregunta 12 Informe

A transformer supplies 12V when connected to a 240V mains. If the transformer takes 0.120A from the mains when used to light a 12V, 24W lamp, what is its efficiency?

57.20%

66.60%

83.30% Respuesta correcta

92.50%

100%

Detalles de la respuesta

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Pregunta 13 Informe

In which of the following are the substances arranged in descending order of their thermal conductivities?

aluminium, copper, iron

aluminium, iron, copper

copper, aluminium, iron

copper, iron. aluminium Respuesta correcta

iron, copper, aluminium

Detalles de la respuesta

Lee la nota de la lección en Heat Transfer (JAMB)

Lee la nota de la lección en Equilibrium Of Forces (WAEC)

Heat Transfer

Equilibrium Of Forces

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Pregunta 14 Informe

A converging lens of focal length 5cm forms a virtual image which is 20cm from the lens. How far from the lens is the object?

2.0cm

4.0 cm Respuesta correcta

6.7cm

20.0cm

25.0cm

Detalles de la respuesta

Lee la nota de la lección en Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Lee la nota de la lección en Electrostatics (JAMB)

Properties Of Waves: Reflection, Refraction, Diffraction

Electrostatics

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Pregunta 15 Informe

The phenomenon of photoelectric effect is NOT used in

automatic doors

bimetallic strip thermometers Respuesta correcta

light meters in cameras

setting off burglar alarms

sound production from film tracks.

Detalles de la respuesta

Lee la nota de la lección en Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

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Pregunta 16 Informe

An air bubble of volume 4cm³ is formed 20m under water. What will be its volume when it rises to just below the surface of the water if the atmospheric pressure is equivalent to a height of 10cm of water?

2cm³

4cm³

6cm³

8cm³

12cm³ Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Pressure (JAMB)

Pressure

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Pregunta 17 Informe

Which of the following is/are TRUE of nuclear fission?

I. A heavy nucleus is split into two nuclei of comparable masses.
II. Two light nuclei are joined together to form a heavier nucleus.
III. The total mass of the products is less than that of the reactants.

I only

II only

III only

I and III only Respuesta correcta

II and III only

Detalles de la respuesta

Lee la nota de la lección en Structure Of The Nucleus (WAEC)

Structure Of The Nucleus

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Pregunta 18 Informe

Which colour is deviated least when white light passes through a triangular prism?

green

indigo

red Respuesta correcta

violet

yellow

Detalles de la respuesta

Lee la nota de la lección en Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Refraction Of Light Through Plane And Curved Surfaces

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Pregunta 19 Informe

The wavelength of a stationary wave is 36.0cm. What is the distance between a node and the next anti-node?

6.0cm

9.0cm Respuesta correcta

18.0cm

360cm

72.0cm

Detalles de la respuesta

Lee la nota de la lección en Production And Propagation Of Waves (WAEC)

Lee la nota de la lección en Sound Waves (WAEC)

Lee la nota de la lección en Introductory Electronics (JAMB)

Lee la nota de la lección en Types Of Waves (WAEC)

Production And Propagation Of Waves

Sound Waves

Introductory Electronics

Types Of Waves

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Pregunta 20 Informe

When a current of 1 .0A flows in an electrolyte for 3.0h, a mass of 1 .0g is deposited. What mass will be deposited in 10.0h if a current of 3.0A flows through the electrolyte?

30.0g

24.0g

10.0g Respuesta correcta

6.0g

0.4g

Detalles de la respuesta

Lee la nota de la lección en Current Electricity (JAMB)

Current Electricity

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Pregunta 21 Informe

Which process will increase the rate of oscillation of a pendulum?

decreasing the amplitude of oscillation of the pendulum

decreasing the length of the pendulum Respuesta correcta

decreasing the mass of the pendulum

increasing the length of the pendulum

increasing the mass of the pendulum.

Detalles de la respuesta

Lee la nota de la lección en Equilibrium Of Forces (WAEC)

Equilibrium Of Forces

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Pregunta 22 Informe

What is the escape velocity of a satellite launched from the earth’s surface? (Take g as 10ms^-2 and the radius of the earth as 6.4 × 10⁶m)

7.80 × 10-3ms^-1

1.13 × 10-4ms^-1 Respuesta correcta

3.56 × 107ms^-1

6.00 × 107ms^-1

1.20 × 108ms^-1

Detalles de la respuesta

Lee la nota de la lección en Gravitational Field (WAEC)

Gravitational Field

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Pregunta 23 Informe

It is NOT possible to determine exactly and simultaneously the position and momentum of a particle. This statement is known as the

Crompton effect

de Broglie’s laws

Frank-Hertz experimental law

Heisenberg’s uncertainly principle Respuesta correcta

wave-particle paradox

Detalles de la respuesta

Lee la nota de la lección en Wave-particle Paradox (WAEC)

Lee la nota de la lección en Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Wave-particle Paradox

Properties Of Waves: Reflection, Refraction, Diffraction

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Pregunta 24 Informe

The ability of the eye to focus on objects at various distances is known as

accommodation Respuesta correcta

astigmatism

eye ring

myopia

presbyopia

Detalles de la respuesta

Lee la nota de la lección en Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

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Pregunta 25 Informe

A body is uniformly accelerated from rest. Which of the following quantities vary/varies linearly with the square of the time?

I. Displacement
II. Velocity
III. Momentum

I only Respuesta correcta

II only

III only

I and II only

II and Ill only

Detalles de la respuesta

Lee la nota de la lección en Motion (JAMB)

Motion

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Pregunta 26 Informe

In the normal use of a simple microscope, a person sees an

erect, real and magnified image

erect, virtual and magnified image Respuesta correcta

inverted, virtual and magnified image

inverted, real and magnified image

inverted and real image the same size as the object

Detalles de la respuesta

Lee la nota de la lección en Electrostatics (JAMB)

Electrostatics

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Pregunta 27 Informe

A short response time is obtained in a liquid-in-glass thermometer when the

bulb is large and thick-walled

bulb is small and thick-walled

stem is long and thin

liquid is of high density and the bulb is large

bulb is thin-walled and the liquid is a good conductor of heat. Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

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Pregunta 28 Informe

Lenz’s law of electromagnetic induction states that

e.m.f. is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit

the induced e.m.f. in a circuit is proportional to the rate of change f the number of lines of force linking the circuit

the induced current in a conductor is in such a direction as to oppose the change producing it Respuesta correcta

a force is exerted in a current-carrying conductor in a magnetic field.

the induced e.m.f. is proportional to the current producing the magnetic flux.

Detalles de la respuesta

Lee la nota de la lección en Electric Field (WAEC)

Electric Field

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Pregunta 29 Informe

If the temperature of a resistance wire is gradually increased, its resistance will

decrease gradually

first increase and then decrease

first increase and then remain the same Respuesta correcta

increase gradually

remain the same

Detalles de la respuesta

Lee la nota de la lección en Change Of State (JAMB)

Change Of State

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Pregunta 30 Informe

In an operating X-ray tube, a high p.d is applied between the cathode and the anode for the purpose of

accelerating the electrons to a very high energy Respuesta correcta

concentrating electrons on the target

heating the anode

heating the cathode

producing a stream of electrons

Detalles de la respuesta

Lee la nota de la lección en Electric Field (WAEC)

Electric Field

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Pregunta 31 Informe

If the size of the hole of a pinhole camera is increased, the image formed becomes

brighter and blurred

brighter and larger

brighter and sharper

blurred and duller

blurred and larger Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Electromagnetic Field (Part 2) (WAEC)

Lee la nota de la lección en Electrostatics (JAMB)

Electromagnetic Field (Part 2)

Electrostatics

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Pregunta 32 Informe

What part of the camera corresponds to the iris of the eye?

diaphragm Respuesta correcta

film

focusing ring

lens

shutter

Detalles de la respuesta

Lee la nota de la lección en Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum (WAEC)

Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum

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Pregunta 33 Informe

A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms^-1]

1320m

660m Respuesta correcta

400m

330m

165m

Detalles de la respuesta

Lee la nota de la lección en Sound Waves (WAEC)

Lee la nota de la lección en Propagation Of Sound Waves (JAMB)

Sound Waves

Propagation Of Sound Waves

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Pregunta 34 Informe

Which device does NOT make use of the magnetic effects of an electric current?

hot-wire ammeter Respuesta correcta

moving-coil ammeter

moving-coil loudspeaker

moving-iron ammeter

telephone earpiece

Detalles de la respuesta

Lee la nota de la lección en Magnets And Magnetic Fields (JAMB)

Magnets And Magnetic Fields

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Pregunta 35 Informe

An object weighing 0.60N is hung on a spiral spring and caused it to extend by 6.0cm. The object is removed and a black of wood replacing it causes the spring to extend by 10.0cm. What is the weight of the block of wood?

0.10N

0.36N

0.80N

1.00N Respuesta correcta

3.60N

Detalles de la respuesta

Lee la nota de la lección en Pressure (JAMB)

Lee la nota de la lección en Elasticity (JAMB)

Pressure

Elasticity

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Pregunta 36 Informe

Which statement is NOT correct about Rutherford’s model of the atom?

The diameter of the nucleus is of the order of 10-15m

The mass of an atom is concentrated in the nucleus

The model is applicable to atoms with one electron in the outer shell Respuesta correcta

The nucleus of an atom is positively charged

The nucleus is surrounded by an electron cloud.

Detalles de la respuesta

Lee la nota de la lección en Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

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Pregunta 37 Informe

In which simple machine is the effort applied between the load and the fulcrum?

claw hammer

nut crackers

pliers

sugar tongs Respuesta correcta

wheelbarrow

Detalles de la respuesta

Lee la nota de la lección en Simple Machines (JAMB)

Simple Machines

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Pregunta 38 Informe

Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element?

Alpha rays

Gamma rays

Positive rays

Ultraviolet rays

X-rays Respuesta correcta

Detalles de la respuesta

Lee la nota de la lección en Electromagnetic Field (Part 2) (WAEC)

Lee la nota de la lección en Electromagnetic Field (Part 1) (WAEC)

Electromagnetic Field (Part 2)

Electromagnetic Field (Part 1)

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Pregunta 39 Informe

The use of electrical fuses in domestic wiring is

to prevent and electrical shock

to supply electricity to all the electrical appliances

to allow electricity to flow easily through the mains to all the circuits

to cut off the mains supply it too high a current flows Respuesta correcta

to fuse all the circuit into one

Detalles de la respuesta

Lee la nota de la lección en Capacitors (JAMB)

Lee la nota de la lección en Electrostatics (JAMB)

Capacitors

Electrostatics

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Pregunta 40 Informe

An object is projected with a velocity of 50ms^-1 from ground level at an angle θ to the vertical. If the total time of flight of the projectile is 5s, what is the value of θ? (g = 10ms^-2)

0°

30° Respuesta correcta

45°

60°

90°

Detalles de la respuesta

Lee la nota de la lección en Motion (JAMB)

Motion

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Pregunta 41 Informe

Which of the following is a percussion instrument?

bell Respuesta correcta

flute

guitar

piano

organ

Detalles de la respuesta

Lee la nota de la lección en Thermal Expansion (JAMB)

Thermal Expansion

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Pregunta 42 Informe

An a.c. generator can be converted into a d.c. generator by replacing

the slip rings with split-ring commutators Respuesta correcta

the slip rings with armatures

the split-rings with slip rings

the split-rings with brushes

the brushes with slip-ring commutators.

Detalles de la respuesta

Lee la nota de la lección en Capacitors (JAMB)

Lee la nota de la lección en Electromagnetic Field (Part 2) (WAEC)

Capacitors

Electromagnetic Field (Part 2)

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Pregunta 43 Informe

An electric heater takes 4A when operated on a 250V supply. What is the cost of the electricity consumed at 10k per kWh when the heater is used for 5 hours?

10k

50k Respuesta correcta

N1.00

N5.00

N10.00

Detalles de la respuesta

Lee la nota de la lección en Current Electricity (JAMB)

Current Electricity

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Pregunta 44 Informe

A body of mass M₁ moving with a velocity U collides with a stationary body of mass M₂ and both move with a common velocity V. If linear momentum is conserved, which expression correctly represents V?

M₁ + M₂ ÷ M₁U

M₂U ÷ M₁ – M₂

M₁U ÷ M₁ – M₂

M₁U ÷ M₁+ M₂ Respuesta correcta

M₂U ÷ M₁ + M₂

Detalles de la respuesta

Lee la nota de la lección en Rectilinear Acceleration (WAEC)

Lee la nota de la lección en Equilibrium Of Forces (WAEC)

Rectilinear Acceleration

Equilibrium Of Forces

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Pregunta 45 Informe

A block of ice of mass 10kg at 0°C absorbs heat energy from its surroundings and changes to water at the same temperature. The heat absorbed is referred to as

heat capacity

latent heat Respuesta correcta

specific heat

specific heat capacity

specific latent heat.

Detalles de la respuesta

Lee la nota de la lección en Heat Energy (WAEC)

Lee la nota de la lección en Quantity Of Heat (JAMB)

Lee la nota de la lección en Elasticity (JAMB)

Heat Energy

Quantity Of Heat

Elasticity