NECO SSCE - Physics - 2002 (Objective)

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 Bonne réponse

3.60N

Détails de la réponse

Lisez la note de cours sur Pressure (JAMB)

Lisez la note de cours sur Elasticity (JAMB)

Pressure

Elasticity

Voir la réponse

Question 13 Rapport

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

the slip rings with split-ring commutators Bonne réponse

the slip rings with armatures

the split-rings with slip rings

the split-rings with brushes

the brushes with slip-ring commutators.

Détails de la réponse

Lisez la note de cours sur Capacitors (JAMB)

Lisez la note de cours sur Electromagnetic Field (Part 2) (WAEC)

Capacitors

Electromagnetic Field (Part 2)

Voir la réponse

Question 14 Rapport

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 Bonne réponse

6.7cm

20.0cm

25.0cm

Détails de la réponse

Lisez la note de cours sur Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Lisez la note de cours sur Electrostatics (JAMB)

Properties Of Waves: Reflection, Refraction, Diffraction

Electrostatics

Voir la réponse

Question 15 Rapport

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 Bonne réponse

to fuse all the circuit into one

Détails de la réponse

Lisez la note de cours sur Capacitors (JAMB)

Lisez la note de cours sur Electrostatics (JAMB)

Capacitors

Electrostatics

Voir la réponse

Question 16 Rapport

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 Bonne réponse

N1.00

N5.00

N10.00

Détails de la réponse

Lisez la note de cours sur Current Electricity (JAMB)

Current Electricity

Voir la réponse

Question 17 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Thermal Expansion (JAMB)

Thermal Expansion

Voir la réponse

Question 18 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Electromagnetic Field (Part 2) (WAEC)

Lisez la note de cours sur Electrostatics (JAMB)

Electromagnetic Field (Part 2)

Electrostatics

Voir la réponse

Question 19 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Current Electricity (JAMB)

Lisez la note de cours sur Reflection Of Light At Plane And Curved Surfaces (JAMB)

Current Electricity

Reflection Of Light At Plane And Curved Surfaces

Voir la réponse

Question 20 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Heat Transfer (JAMB)

Lisez la note de cours sur Temperature And Its Measurement (JAMB)

Heat Transfer

Temperature And Its Measurement

Voir la réponse

Question 21 Rapport

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 Bonne réponse

II only

III only

I and II only

II and Ill only

Détails de la réponse

Lisez la note de cours sur Motion (JAMB)

Motion

Voir la réponse

Question 22 Rapport

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 Bonne réponse

Détails de la réponse

Voir la réponse

Question 23 Rapport

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. Bonne réponse

Détails de la réponse

Lisez la note de cours sur Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

Voir la réponse

Question 24 Rapport

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% Bonne réponse

92.50%

100%

Détails de la réponse

Voir la réponse

Question 25 Rapport

What is stored by a dry Leclanhé cell?

chemical energy Bonne réponse

heat energy

mechanical energy

nuclear energy

solar energy

Détails de la réponse

Lisez la note de cours sur Electric Cells (JAMB)

Electric Cells

Voir la réponse

Question 26 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Electromagnetic Field (Part 2) (WAEC)

Lisez la note de cours sur Electromagnetic Field (Part 1) (WAEC)

Electromagnetic Field (Part 2)

Electromagnetic Field (Part 1)

Voir la réponse

Question 27 Rapport

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

erect, real and magnified image

erect, virtual and magnified image Bonne réponse

inverted, virtual and magnified image

inverted, real and magnified image

inverted and real image the same size as the object

Détails de la réponse

Lisez la note de cours sur Electrostatics (JAMB)

Electrostatics

Voir la réponse

Question 28 Rapport

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 Bonne réponse

400m

330m

165m

Détails de la réponse

Lisez la note de cours sur Sound Waves (WAEC)

Lisez la note de cours sur Propagation Of Sound Waves (JAMB)

Sound Waves

Propagation Of Sound Waves

Voir la réponse

Question 29 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Simple Harmonic Motion (WAEC)

Simple Harmonic Motion

Voir la réponse

Question 30 Rapport

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

green

indigo

red Bonne réponse

violet

yellow

Détails de la réponse

Lisez la note de cours sur Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Refraction Of Light Through Plane And Curved Surfaces

Voir la réponse

Question 31 Rapport

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

claw hammer

nut crackers

pliers

sugar tongs Bonne réponse

wheelbarrow

Détails de la réponse

Lisez la note de cours sur Simple Machines (JAMB)

Simple Machines

Voir la réponse

Question 32 Rapport

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 Bonne réponse

iron, copper, aluminium

Détails de la réponse

Lisez la note de cours sur Heat Transfer (JAMB)

Lisez la note de cours sur Equilibrium Of Forces (WAEC)

Heat Transfer

Equilibrium Of Forces

Voir la réponse

Question 33 Rapport

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 Bonne réponse

6.0g

0.4g

Détails de la réponse

Lisez la note de cours sur Current Electricity (JAMB)

Current Electricity

Voir la réponse

Question 34 Rapport

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

diaphragm Bonne réponse

film

focusing ring

lens

shutter

Détails de la réponse

Lisez la note de cours sur Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum (WAEC)

Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum

Voir la réponse

Question 35 Rapport

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 Bonne réponse

II and III only

Détails de la réponse

Lisez la note de cours sur Structure Of The Nucleus (WAEC)

Structure Of The Nucleus

Voir la réponse

Question 36 Rapport

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 Bonne réponse

specific heat

specific heat capacity

specific latent heat.

Détails de la réponse

Lisez la note de cours sur Heat Energy (WAEC)

Lisez la note de cours sur Quantity Of Heat (JAMB)

Lisez la note de cours sur Elasticity (JAMB)

Heat Energy

Quantity Of Heat

Elasticity

Voir la réponse

Question 37 Rapport

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 Bonne réponse

The nucleus of an atom is positively charged

The nucleus is surrounded by an electron cloud.

Détails de la réponse

Lisez la note de cours sur Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

Voir la réponse

Question 38 Rapport

Which of the following is a percussion instrument?

bell Bonne réponse

flute

guitar

piano

organ

Détails de la réponse

Lisez la note de cours sur Thermal Expansion (JAMB)

Thermal Expansion

Voir la réponse

Question 39 Rapport

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 Bonne réponse

6.4

3.6

Détails de la réponse

Lisez la note de cours sur Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

Voir la réponse

Question 40 Rapport

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

hot-wire ammeter Bonne réponse

moving-coil ammeter

moving-coil loudspeaker

moving-iron ammeter

telephone earpiece

Détails de la réponse

Lisez la note de cours sur Magnets And Magnetic Fields (JAMB)

Magnets And Magnetic Fields

Voir la réponse

Question 41 Rapport

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 Bonne réponse

concentrating electrons on the target

heating the anode

heating the cathode

producing a stream of electrons

Détails de la réponse

Lisez la note de cours sur Electric Field (WAEC)

Electric Field

Voir la réponse

Question 42 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Pressure (JAMB)

Pressure

Voir la réponse

Question 43 Rapport

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 Bonne réponse

M₂U ÷ M₁ + M₂

Détails de la réponse

Lisez la note de cours sur Rectilinear Acceleration (WAEC)

Lisez la note de cours sur Equilibrium Of Forces (WAEC)

Rectilinear Acceleration

Equilibrium Of Forces

Voir la réponse

Question 44 Rapport

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. Bonne réponse

Détails de la réponse

Lisez la note de cours sur Vapours (JAMB)

Vapours

Voir la réponse

Question 45 Rapport

According to the Kinetic Theory, what does NOT occur when the temperature of a constant volume of gas is increased?

a decrease in the mean speed kinetic energy of the molecules Bonne réponse

an increase in the mean speed of the molecules

an increase in the momentum change at each collision.

an increase in the number of collisions per second

an increase in the pressure exerted by the gas.

Détails de la réponse

Lisez la note de cours sur Thermal Expansion (JAMB)

Thermal Expansion

Voir la réponse

Question 46 Rapport

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 Bonne réponse

none

Détails de la réponse

Lisez la note de cours sur Structure Of The Atom (Nigeria Only) (WAEC)

Lisez la note de cours sur Electrostatics (JAMB)

Structure Of The Atom (Nigeria Only)

Electrostatics

Voir la réponse

Question 47 Rapport

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° Bonne réponse

45°

60°

90°

Détails de la réponse

Lisez la note de cours sur Motion (JAMB)

Motion

Voir la réponse

Question 48 Rapport

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

accommodation Bonne réponse