NECO SSCE - Physics - 2003 (Objective)

Question 1 Report

Which of the following statements is NOT true?

A lead-acid accumulator can deliver a large current because of its very large internal resistance. Correct answer

A secondary cell can be recharged.

As a lead-acid accumulator is being charged, the density of the acid in it increases.

The chemical action in a primary cell is irreversible.

The conventional current in a circuit rlows from the positive to the negative terminal of the battery.

Answer Details

Read lesson note on Current Electricity (JAMB)

Read lesson note on Electric Cells (JAMB)

Current Electricity

Electric Cells

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Question 2 Report

How much heat is required to convert 50g of water at 100°C to steam at the same temperature? (Specific latent heat of vaporization of water = 2260 Jg^-11)

1.13 × 10^-4J

1.31 × 10²J

1.30 × 10⁴J

1.13 × 10⁵J Correct answer

1.31 × 10⁶J

Answer Details

Read lesson note on Quantity Of Heat (JAMB)

Quantity Of Heat

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Question 3 Report

\(^{226}_{88}Ra\) \(\to\) \(^{222}_{866}Rn\) + X + Energy. The equation above represents a nuclear decay of radium isotope. What is X?

Alpha particle Correct answer

Beta particle

Gamma ray

Neutron

X – ray

Answer Details

Read lesson note on Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

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Question 4 Report

Young’s modulus of elasticity is the ratio of stress to strain, provided the load does not exceed the

breaking point

elastic limit Correct answer

plastic limit

stress limit

yield point

Answer Details

Read lesson note on Temperature And Its Measurement (JAMB)

Read lesson note on Liquids At Rest (JAMB)

Read lesson note on Elasticity (JAMB)

Temperature And Its Measurement

Liquids At Rest

Elasticity

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Question 5 Report

Evaporation of a liquid produces cooling of the liquid because the

attraction between the vapour molecules and the liquid molecules is great

average kinetic energy of the liquid is reduced Correct answer

density of the liquid decreases

vapour pressure above the liquid rises

volume of the liquid decreases

Answer Details

Read lesson note on Vapours (JAMB)

Vapours

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Question 6 Report

Which of the following properties is NOT exhibited by sound waves?

Diffraction

interference

Polarisation Correct answer

Reflection

Refraction

Answer Details

Read lesson note on Sound Waves (WAEC)

Sound Waves

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Question 7 Report

The space surrounding a magnet in which the magnetic force is exerted is

magnetic field Correct answer

magnetic flux

magnetic point

magnetic pole

magnetic strength

Answer Details

Read lesson note on Electric Field (WAEC)

Electric Field

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Question 8 Report

Which of the following motions will be produced by a pair of equal, opposite and non-collinear parallel forces acting on a body?

Oscillatory

Random

Rotational Correct answer

Translational

Vibratory

Answer Details

Read lesson note on Scalars And Vectors (WAEC)

Read lesson note on Motion (JAMB)

Read lesson note on Equilibrium Of Forces (WAEC)

Scalars And Vectors

Motion

Equilibrium Of Forces

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Question 9 Report

A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the

charges generated by friction in the tanker are conducted to the earth Correct answer

chain vibrates in resonance with the tanker’s engine

heat generated by friction in the engine is conducted to the earth

petrol tanker is balanced on the road

tanker does not exceed a certain speed limit

Answer Details

Read lesson note on Electrostatics (JAMB)

Electrostatics

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Question 10 Report

Which of the following statement(s) is/are correct about the isotopes of an elements? They have the same

I. chemical properties
II. nucleon number
III proton number

I only

II only

I and II only

I and III only Correct answer

I,II and III

Answer Details

Read lesson note on Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

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Question 11 Report

A ball of mass m moving at velocity u collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

\(\frac{u}{v}\) Correct answer

\(\frac{mu}{2}\)

\(\frac{u}{m}\)

Answer Details

Read lesson note on Newton’s Laws Of Motion (WAEC)

Newton’s Laws Of Motion

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Question 12 Report

The resistance of a series R-C circuit is 5 ω If the impedance of the circuit is 13 ω calculate the reactance of the capacitor

12 Ω Correct answer

14 Ω

16 Ω

18 Ω

65 Ω

Answer Details

Read lesson note on Electrostatics (JAMB)

Electrostatics

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Question 13 Report

An evidence of the wave nature of matter is

Browniam motion

Compton effect

diffraction Correct answer

diffusion

photo electricity

Answer Details

Read lesson note on Light Waves (WAEC)

Read lesson note on Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Light Waves

Properties Of Waves: Reflection, Refraction, Diffraction

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Question 14 Report

Which of the following instruments can be used to measure e.m.f. most accurately.

Ammeter

Galvanometer

Metre bridge

Potentiometer Correct answer

Voltmeter

Answer Details

Read lesson note on Electric Cells (JAMB)

Read lesson note on Characteristics Of Sound Waves (JAMB)

Electric Cells

Characteristics Of Sound Waves

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Question 15 Report

A narrow, uniform glass tube, closed at one end, constains air which is sealed by a thread of mercury. The tube is placed first horizontally and then vertically with the open end at the top. Which of the following statements is correct?

The length of the entrapped air in the horizontal position is less than that in the vertical position

The length of the entrapped air in the vertical position is less than that in the horizontal position Correct answer

The length of the mercury column becomes shorter in the horizontal position than in the vertical position

The length of the mercury column becomes shorter in the vertical position than in the horizontal position

The pressure of the entrapped air is atmospheric in both cases.

Answer Details

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Question 16 Report

The distance between two successive crests of a water wave is 0.5m. If a particle on the surface of the water wave makes two complete vertical oscillations in 1s, calculate the speed of the wave.

0.25ms^-1

0.50ms^-1

1.00ms^-1 Correct answer

2.00ms^-1

4.00ms^-1

Answer Details

Read lesson note on Change Of State (JAMB)

Change Of State

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Question 17 Report

A transformer is required to give 120V from a 240V mains supply. If the primary has 5500 turns, how many turns has the secondary?

232

450

550

2750 Correct answer

11000

Answer Details

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Question 18 Report

The mode of transference of heat which does not require any material medium is

conduction

convection

evaporation

radiation Correct answer

transmission

Answer Details

Read lesson note on Heat Transfer (JAMB)

Heat Transfer

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Question 19 Report

A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C.

6.0Ω

6.42Ω

7.6Ω Correct answer

8.4Ω

16.0Ω

Answer Details

Read lesson note on Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

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Question 20 Report

A constant force of 5N acts for 5s on a mass of 5kg initially at rest. Calculate the final momentum of the mass.

125 kgms^-1

75 kgms^-1

25 kgms^-1 Correct answer

20 kgms^-1

5 kgms^-1

Answer Details

Read lesson note on Newton’s Laws Of Motion (WAEC)

Newton’s Laws Of Motion

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Question 21 Report

For which of the following sets are the units fundamental?

Area, length and volume

Impulse, mass and time

Length, time and mass Correct answer

Velocity, distance and time

Volume, mass and density

Answer Details

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Question 22 Report

A stone is released from a height of 80m above the ground. Calculate its velocity just before it strikes the ground. (g=10ms^-2)

25ms^-1

40 ms^-1 Correct answer

55 ms^-1

65ms^-1

80 ms^-1

Answer Details

Read lesson note on Gravitational Field (JAMB)

Gravitational Field

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Question 23 Report

A body that produces its own light is said to be

luminous Correct answer

non-incandescent

opaque

translucent

transparent

Answer Details

Read lesson note on Light Energy (JAMB)

Light Energy

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Question 24 Report

The area under the curve of a velocity time graph represents

acceleration

distance covered Correct answer

instantaneous speed

time taken

work done

Answer Details

Read lesson note on Motion (JAMB)

Motion

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Question 25 Report

Lines of force

I. Begin and end on equal and opposite electric charges.
II. are in state of tension which causes them to shorten
III. attract one another.

Which of the statement(s) is/are correct?

I only

II only

III only

I and II only Correct answer

II and III only

Answer Details

Read lesson note on Electrostatics (JAMB)

Electrostatics

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Question 26 Report

Which of the following scientists postulated that moving particles exhibit wave properties?

Ernest Rutherford

Erwin Schroedinger

Frank Hertz

Louis de Broglie Correct answer

Werner Heisenberg.

Answer Details

Read lesson note on Electric Field (WAEC)

Electric Field

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Question 27 Report

Calculate the critical angle for light travelling from water to air. (Refractive index of water = 1.33)

36.9°

41.3°

48.8° Correct answer

49.2°

51.4°

Answer Details

Read lesson note on Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Refraction Of Light Through Plane And Curved Surfaces

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Question 28 Report

The motion of the prongs of a sounding turning fork is

circular

oscillatory Correct answer

random

rotational

translational

Answer Details

Read lesson note on Motion (JAMB)

Motion

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Question 29 Report

An object is placed 30 cm in front of a concave mirror of focal length 20cm. Calculate the distance between the object and the image.

90cm Correct answer

40cm

30cm

20cm

10cm

Answer Details

Read lesson note on Reflection Of Light At Plane And Curved Surfaces (JAMB)

Reflection Of Light At Plane And Curved Surfaces

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Question 30 Report

The inability of the eye to focus near objects is known as

astigmatism

eye ring

hypermetropia Correct answer

myopia

presbyopia

Answer Details

Read lesson note on Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

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Question 31 Report

Two equal capacitances are connected first in series and then in parallel. The ratio of the effective series capacitance to the effective parallel capacitance is

0.25 Correct answer

0.50

1.00

2.20

4.00

Answer Details

Read lesson note on Capacitors (JAMB)

Read lesson note on Simple A.C Circuits (JAMB)

Capacitors

Simple A.C Circuits

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Question 32 Report

Calculate the amount of heat generated in an external load of resistance 8Ω if an alternating current of peak value 5 A is passed through it for 100s.

2.0 × 10⁴J Correct answer

1.0 × 10⁴J

5.0 × 10³J

4.0 × 10³J

2.0 × 10²J

Answer Details

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Question 33 Report

The S.l unit of magnetic flux density is

farad

henry

kgm^-3

tesla Correct answer

weber

Answer Details

Read lesson note on Electric Field (WAEC)

Read lesson note on Magnetic Field (Part 1) (WAEC)

Electric Field

Magnetic Field (Part 1)

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Question 34 Report

A body is launched from the earth’s surface, of radius R, so that it just escapes from the gravitational influence of the earth; If the gravitational constant is G and the mass of the earth is M, what is the escape velocity of the boby.

\(\sqrt{2GM}\) ÷ R

\(\frac{\sqrt{2GM}}{R}\) Correct answer

\(\frac{\sqrt{2G}}{MR}\)

\(\sqrt{2GMR}\)

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

Answer Details

Read lesson note on Gravitational Field (JAMB)

Gravitational Field

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Question 35 Report

A wire of length 100cm and cross-sectional area 2.0 × 10^-3cm² has a resistance of 0.10 ω. Calculate its electrical conductively.

2.0 × 10-6 ω^-1cm^-1

5.0 × 10-5 ω^-1cm^-1 Correct answer

2.0 × 106 ω^-1cm^-1

5.0 × 106 ω^-1cm^-1

5.0 × 107 ω^-1cm^-1

Answer Details

Read lesson note on Capacitors (JAMB)

Capacitors

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Question 36 Report

Which of the following statements about the concept of solid friction is NOT true?

It always acts in the direction of motion Correct answer

It causes wear and tear in car tyres

It depends on the nature of the surfaces in contact

It is independent of the area of the surfaces in contact.

It reduces the efficiency of the machine

Answer Details

Read lesson note on Friction (JAMB)

Friction

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Question 37 Report

In 90 seconds, the mass of a radioactive element reduces to \(\frac{1}{16}\) of its original value. Determine the half- life of the element.

15.0s

18.0s

22.5s Correct answer

30.0s

45.0s

Answer Details

Read lesson note on Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

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Question 38 Report

Which of the following radiations have the longest wavelength?

Gamma rays

Infra-red

Light waves

Radio waves Correct answer

Ultra-violet rays

Answer Details

Read lesson note on Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum (WAEC)

Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum

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Question 39 Report

A sheet of white paper viewed through blue glass appears blue because

blue is a primary colour

the glass absorbs all colours except the blue colour Correct answer

the glass reflects blue colour

the paper reflects blue colour only

white light is easily absorbed by the glass

Answer Details

Read lesson note on Electrostatics (JAMB)

Electrostatics

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Question 40 Report

Lenz’s law of electromagnetic induction states that

a force is exerted on a current carrying conductor in a magnetic field

the induced current in a conductor is in such a direction as to oppose the change producing it Correct answer

the magnitude of the induced electromotive force in a circuit is proportional to the rate of change of the number of lines of force linking the circuit

the magnitude of the induced electromotive force is proportional to the current producing the magnetic flux

whenever there is a change in the magnetic flux linked with the circuit, an electromotive is induced

Answer Details

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Question 41 Report

A machine has an efficiency of 80%. If the machine is required to overcome a load of 60N with a force of 40N, calculate its velocity ratio.

0.53

0.83

1.20

1.50

1.88 Correct answer

Answer Details

Read lesson note on Work, Energy And Power (WAEC)

Read lesson note on Simple Machines (JAMB)

Work, Energy And Power

Simple Machines

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Question 42 Report

The volume of a given mass of gas is 40cm³ at 27° C. What is its volume at 90° C if its pressure remains constant?

32.84cm³

40.02cm³

48.40cm³ Correct answer

57.44cm³

72.84cm³

Answer Details

Read lesson note on Gas Laws (JAMB)

Gas Laws

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Question 43 Report

Which of the following statement(s) is/are correct?

I. When a liquid expands its density falls
II. When a mercury-in-glass thermometer is placed in a hot liquid, the mercury level first descends and then rises.
III. The apparent expansion of a liquid is greater than its real expansion.

I only Correct answer

II only

III only

I and II only

II and III only

Answer Details

Read lesson note on Pressure (JAMB)

Pressure

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Question 44 Report

Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain

pressure is increased