JAMB UTME - Physics - 1978 | Green Bridge CBT

A solid suspended by a piece of string is completely immersed in water. On attempting to lift the solid out of the water, the string breaks when the solid is partly out of the water. This is because

the tension in the string decreases as the solid is lifted

the mass of the solid has increased

the solid apparently weighs less when completely immersed in water than when partially immersed Ìdáhùn tó tọ́

part of the solid still in water is exerting more force on the string

the solid is no longer in equilibrium with water

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Gravitational Field (WAEC)

Ka ìwé ẹ̀kọ́ nípa Speed And Velocity (WAEC)

Gravitational Field

Speed And Velocity

Wo Idahun

Ibeere 4 Ìròyìn

The net charge on the atom is zero because

the electrons and the protons that are charged are in the nucleus

the total charge on the electrons is equal to the total charge on the protons Ìdáhùn tó tọ́

the neutrons from a shield around the charged protons

the number of electrons in an atom is half the number of protons

A and B above

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Structure Of The Atom (Nigeria Only) (WAEC)

Structure Of The Atom (Nigeria Only)

Wo Idahun

Ibeere 5 Ìròyìn

Two resistors R1 and R2 are connected in parallel, R2 being greater than R1. The combined resistance is

less than R₁ Ìdáhùn tó tọ́

greater than R₂

the sum of R₁ and R₂

the difference of R₂ and R₁

greater thanR₁ but less than R₂

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Scalars And Vectors (JAMB)

Ka ìwé ẹ̀kọ́ nípa Equilibrium Of Forces (WAEC)

Scalars And Vectors

Equilibrium Of Forces

Wo Idahun

Ibeere 6 Ìròyìn

The density of a solid is defined as the

mass of the solid compared to the mass of an equal volume of water

amount of water displaced when a unit mass of thesolid is immersed in it

weight per unit volume of the solid

volume per unit mass of the solid

mass per unit volume of the solid Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Characteristics Of Sound Waves (JAMB)

Ka ìwé ẹ̀kọ́ nípa Pressure (JAMB)

Ka ìwé ẹ̀kọ́ nípa Measurements And Units (JAMB)

Characteristics Of Sound Waves

Pressure

Measurements And Units

Wo Idahun

Ibeere 7 Ìròyìn

The boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each of two tin cans. The physical principle employed is that sound travels

mainly through air

fainter in stretched string

faster through gases than in solids and liquids

with greater ease through a string than in air Ìdáhùn tó tọ́

none of the above is correct

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Sound Waves (WAEC)

Ka ìwé ẹ̀kọ́ nípa Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Ka ìwé ẹ̀kọ́ nípa Propagation Of Sound Waves (JAMB)

Ka ìwé ẹ̀kọ́ nípa Electrostatics (JAMB)

Sound Waves

Refraction Of Light Through Plane And Curved Surfaces

Propagation Of Sound Waves

Electrostatics

Wo Idahun

Ibeere 8 Ìròyìn

The latent heat of fusion of ice is 80cal g^-1. How much heat is required to change 10g of ice at Q^oC into water at the same temperature?

80 cal

10 cal

8 cal

800 cal Ìdáhùn tó tọ́

400 cal

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Quantity Of Heat (JAMB)

Quantity Of Heat

Wo Idahun

Ibeere 9 Ìròyìn

An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit distance from each mirror, the number of images formed is

3 Ìdáhùn tó tọ́

Awọn alaye Idahun

Wo Idahun

Ibeere 10 Ìròyìn

a guitar string is 75cm long. the wavelength of its fundamental note is

75cm

150cm Ìdáhùn tó tọ́

37.5cm

112cm

50cm

Awọn alaye Idahun

Wo Idahun

Ibeere 11 Ìròyìn

The heat from the sun reaches the earth by the process

insulation

precipitation

conduction

convection

radiation Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Heat Energy (WAEC)

Heat Energy

Wo Idahun

Ibeere 12 Ìròyìn

The force required to make an object of mass m, travelling with velocity v, turn in a circle of radius r is

\(\frac{mv^2}{r}\) Ìdáhùn tó tọ́

\(\frac{mr^2}{v}\)

\(\frac{mr}{v}\)

\(\frac{mv}{r^2}\)

\(\frac{mv}{r}\)

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Equilibrium Of Forces (WAEC)

Equilibrium Of Forces

Wo Idahun

Ibeere 13 Ìròyìn

mercury is a better barometric fluid than water because i. it needs no colouring ii. its density is many times greater than that of water iii. it does not wet glass iv. it has a high vapour pressure v. it has a high boiling point. which of the above statements are true?

i and ii only

i, ii and iii only Ìdáhùn tó tọ́

iii and iv only

iv and v only

iii, iv and v only

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Position, Distance And Displacement (WAEC)

Ka ìwé ẹ̀kọ́ nípa Vapours (JAMB)

Ka ìwé ẹ̀kọ́ nípa Pressure (JAMB)

Position, Distance And Displacement

Vapours

Pressure

Wo Idahun

Ibeere 14 Ìròyìn

The angular dispersion of a prism depends on

the index of refraction only Ìdáhùn tó tọ́

the angle of incidence as well as the index of refraction

the angle of incidence only

the thickness of the prism

the prism angle

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Electrostatics (JAMB)

Electrostatics

Wo Idahun

Ibeere 15 Ìròyìn

Every house supplied with electricity is provided with a box of fuses so that

the consumption of electricity can be recorded

people residing in the house will not have an electric shock if they touch a live wire

the total current drawn from the mains can be limited Ìdáhùn tó tọ́

the voltage supply can be stabilized

it serves as a standby supply when there is a power failure

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Electrostatics (JAMB)

Electrostatics

Wo Idahun

Ibeere 16 Ìròyìn

An ice cube floats in a glass of water filled to the brim. What happens when the ice melts?

The water level remains the same Ìdáhùn tó tọ́

there is a drop in the level of water in the glass due to condensation on its outside

the water in the glass overflows

the level of water drops because melted ice occupies less volume

none of the above is correct

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Friction (JAMB)

Ka ìwé ẹ̀kọ́ nípa Fluid At Rest (WAEC)

Friction

Fluid At Rest

Wo Idahun

Ibeere 17 Ìròyìn

The internationally agreed system of units(SI) for physical measurements are

Ib, ft, sec

g, m, sec

kg, m, sec Ìdáhùn tó tọ́

cm, g, sec

kg, cm, sec

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Fundamental And Derived Quantities And Units (WAEC)

Fundamental And Derived Quantities And Units

Wo Idahun

Ibeere 18 Ìròyìn

In a D.C. circuit, a 10 microfarad (mf) capacitor is placed in series with a 10 0hm resistor. The total resistance of the combination is

10 ohms

1 ohms

zero

20 ohms

infinite Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Capacitors (JAMB)

Ka ìwé ẹ̀kọ́ nípa Simple A.C Circuits (JAMB)

Capacitors

Simple A.C Circuits

Wo Idahun

Ibeere 19 Ìròyìn

If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours a lamp required 1A on a 200v line?

24k Ìdáhùn tó tọ́

55k

40k

26k

32k

Awọn alaye Idahun

Wo Idahun

Ibeere 20 Ìròyìn

In The Diagram, what is the value of W?

10N Ìdáhùn tó tọ́

15N

20N

30N

Awọn alaye Idahun

Wo Idahun

Ibeere 21 Ìròyìn

Three 5 ohms resistors connected in parallel have a potential difference of 60v. applied across the combination. The current in each resistor is

36A

12A Ìdáhùn tó tọ́

24A

10A

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Capacitors (JAMB)

Ka ìwé ẹ̀kọ́ nípa Current Electricity (JAMB)

Ka ìwé ẹ̀kọ́ nípa Concepts Of Matter (WAEC)

Capacitors

Current Electricity

Concepts Of Matter

Wo Idahun

Ibeere 22 Ìròyìn

On an a.c generator, which of the following does not apply?

field magnet

commutator Ìdáhùn tó tọ́

armature

slip rings

carbon brushes

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Capacitors (JAMB)

Ka ìwé ẹ̀kọ́ nípa Simple A.C. Circuits (WAEC)

Ka ìwé ẹ̀kọ́ nípa Simple A.C Circuits (JAMB)

Capacitors

Simple A.C. Circuits

Simple A.C Circuits

Wo Idahun

Ibeere 23 Ìròyìn

A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms^-1. The recoil speed of the machine gun is

0.5 msec^-1

1.5 msec^-1

1 msec^-1 Ìdáhùn tó tọ́

2 msec^-1

4 msec^-1

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Newton’s Laws Of Motion (WAEC)

Newton’s Laws Of Motion

Wo Idahun

Ibeere 24 Ìròyìn

The equivalent capacitance for the circuit drawn above is

18µf

4µf Ìdáhùn tó tọ́

2µf

12µf

13µf

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Capacitors (JAMB)

Capacitors

Wo Idahun

Ibeere 25 Ìròyìn

An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit from each mirror. The number of images formed is

3 Ìdáhùn tó tọ́

Awọn alaye Idahun

Wo Idahun

Ibeere 26 Ìròyìn

Of the following which is different from the other?

x-rays

gamma-rays

cathode rays Ìdáhùn tó tọ́

ultra violet rays

infrared rays

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum (WAEC)

Ka ìwé ẹ̀kọ́ nípa Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Ka ìwé ẹ̀kọ́ nípa Structure Of The Atom (Nigeria Only) (WAEC)

Ka ìwé ẹ̀kọ́ nípa Electromagnetic Field (Part 2) (WAEC)

Ka ìwé ẹ̀kọ́ nípa Types Of Waves (WAEC)

Electromagnetic Waves: Types Of Radiation In Electromagnetic Spectrum

Properties Of Waves: Reflection, Refraction, Diffraction

Structure Of The Atom (Nigeria Only)

Electromagnetic Field (Part 2)

Types Of Waves

Wo Idahun

Ibeere 27 Ìròyìn

A man walks 1km due east and then 1km due north. His displacement is

1 km N15^oE

1 km N30^oE

\(\sqrt 2\)km N 45^oE Ìdáhùn tó tọ́

\(\sqrt 2\)km N 60^oE

2km N 75^oE

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Scalars And Vectors (JAMB)

Ka ìwé ẹ̀kọ́ nípa Position, Distance And Displacement (WAEC)

Scalars And Vectors

Position, Distance And Displacement

Wo Idahun

Ibeere 28 Ìròyìn

The amount of heat required to raise the temperature of a body is

Thermal energy Ìdáhùn tó tọ́

thermal conduction

heat loss

specific heat capacity

thermal capacity

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

Wo Idahun

Ibeere 29 Ìròyìn

A potential difference of 6v is used to produce a current of 5A for 200s through a heating coil. The heat produced is

4800 cal

6000 cal

2400J

240k cal

6000J Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Current Electricity (JAMB)

Ka ìwé ẹ̀kọ́ nípa Electrical Energy And Power (JAMB)

Current Electricity

Electrical Energy And Power

Wo Idahun

Ibeere 30 Ìròyìn

A temperature 20^oC is the same as

36^oF

60^oF Ìdáhùn tó tọ́

11.1^oF

43.1^oF

25^oF

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

Wo Idahun

Ibeere 31 Ìròyìn

An electric charge could be transmitted through

wood, rubber and stone

paper, clay and plastic

glass, acid and cloth

The human body, water and metals Ìdáhùn tó tọ́

all of the above

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Electrostatics (JAMB)

Electrostatics

Wo Idahun

Ibeere 32 Ìròyìn

an object 1cm high placed on the axis 15cm from a converging lens forms an image 30cm from the lens. The size of the image is

0.5cm

1.5cm

3cm

2.5m

2cm Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Ka ìwé ẹ̀kọ́ nípa Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Ka ìwé ẹ̀kọ́ nípa Electromagnetic Field (Part 2) (WAEC)

Refraction Of Light Through Plane And Curved Surfaces

Properties Of Waves: Reflection, Refraction, Diffraction

Electromagnetic Field (Part 2)

Wo Idahun

Ibeere 33 Ìròyìn

The statements below were made by some students describing what happened during the determination of the melting point of solids.
i. the temperature of the solid was solid until melting started
ii. the temperature of the solid rose until melting started
iii. during melting, the temperature was rising
iv. during melting, the temperature was constant
v. the temperature continued to rise after all the solid had melted
vi. the temperature stopped rising after all the solid had melted. Which of the following gives correct statements in the right order?

ii, iv, and v Ìdáhùn tó tọ́

ii, iii and vi

i, iii and vi

i, iii and v

i, iv and v

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Friction (JAMB)

Ka ìwé ẹ̀kọ́ nípa Quantity Of Heat (JAMB)

Ka ìwé ẹ̀kọ́ nípa Temperature And Its Measurement (JAMB)

Friction

Quantity Of Heat

Temperature And Its Measurement

Wo Idahun

Ibeere 34 Ìròyìn

Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is

10W

20W

40W

80W Ìdáhùn tó tọ́

None of the above

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Current Electricity (JAMB)

Ka ìwé ẹ̀kọ́ nípa Simple A.C Circuits (JAMB)

Current Electricity

Simple A.C Circuits

Wo Idahun

Ibeere 35 Ìròyìn

Why is it impossible for the lines of force of an electric field to cross one another?

like charges repel each other

a charged particle is deflected by an eletric field

like charges are arranged on the same line of force

a positively charged particle can travel in only one direction at any time Ìdáhùn tó tọ́

none of these is correct

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Electrostatics (JAMB)

Electrostatics

Wo Idahun

Ibeere 36 Ìròyìn

The following are some units i. Ns ii. Mm iii. Nm^-2 iv. J^oK^-1. What are the units of latent heat?

iii

iv Ìdáhùn tó tọ́

Awọn alaye Idahun

Wo Idahun

Ibeere 37 Ìròyìn

A few grains of table salt were put in a cup of water, kept at constant temperature and left undisturbed. Eventually all the water tasted salty. The action is due to

convection

osmosis

capillarity

diffusion Ìdáhùn tó tọ́

conductivity

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Scalars And Vectors (JAMB)

Ka ìwé ẹ̀kọ́ nípa Temperature And Its Measurement (JAMB)

Scalars And Vectors

Temperature And Its Measurement

Wo Idahun

Ibeere 38 Ìròyìn

The factional force between two bodies

exists only when there is relative motion or tendency for motion

acts so as to oppose the motion

depends on the normal reaction between the two surfaces

is relatively independent of the area in contact

has all of these characteristics Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Friction (JAMB)

Ka ìwé ẹ̀kọ́ nípa Pressure (JAMB)

Friction

Pressure

Wo Idahun

Ibeere 39 Ìròyìn

The angular dispersion of a prism depends on

the index of refraction only Ìdáhùn tó tọ́

the angle of incidence as well as the index of refraction

the angle of incidence only

the thickness of the prism

the prism angle

Awọn alaye Idahun

Wo Idahun

Ibeere 40 Ìròyìn

A gas at pressure PN-m^-2 and temperature 27^oC is heated to 77^oC at constant volume. The new pressure is

0.85 PN-m^-2

0.86 PN-m^-2

1.16 PN-m^-2 Ìdáhùn tó tọ́

1.18 PN-m^-2

2.85 PN-m^-2

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Quantity Of Heat (JAMB)

Quantity Of Heat

Wo Idahun

Ibeere 41 Ìròyìn

A magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on

the number of turns in the coil

the strength of the magnet

the speed at which the magnet is moved

all of the above Ìdáhùn tó tọ́

none of the above

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Magnets And Magnetic Fields (JAMB)

Magnets And Magnetic Fields

Wo Idahun

Ibeere 42 Ìròyìn

A string is sustaining a stationary wave when

the frequency of the wave is not proportional to the wavelength of the wave

the amplitude of vibration is always zero

two equal waves are travelling in opposite directions Ìdáhùn tó tọ́

the waves are longitudinal

the frequency is directly proportional to the length of the string

Awọn alaye Idahun

Wo Idahun

Ibeere 43 Ìròyìn

In order to convert a galvanometer into an ammeter

a low resistance shunt is connected in parallel Ìdáhùn tó tọ́

a low resistance shunt is connected in series

a medium resistance shunt is connected in series

a high resistance shunt is connected in parallel

a high resistance shunt is connected in series

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Current Electricity (JAMB)

Ka ìwé ẹ̀kọ́ nípa Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Ka ìwé ẹ̀kọ́ nípa Motion (JAMB)

Current Electricity

Properties Of Waves: Reflection, Refraction, Diffraction

Motion

Wo Idahun

Ibeere 44 Ìròyìn

A palm fruit dropped to the ground from the top of a tree 45m tall. How long does it take to reach the ground? (g = 10ms^-2)

4.5s

7.5s

3s Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Gravitational Field (JAMB)

Gravitational Field

Wo Idahun

Ibeere 45 Ìròyìn

A piece of rubber 10cm long stretches 6mm when a load of 100N is hung from it. What is the strain?

6 x 10^-2 Ìdáhùn tó tọ́

6 x 10^-3

0.6

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Elasticity (JAMB)

Elasticity

Wo Idahun

Ibeere 46 Ìròyìn

Which of the following is true for the image formed by a convex mirror? i. the image is always virtual ii. the image is always erect iii. the image lies between pole and focus iv. the image is never magnified v. the focus length is negative

i only

i and ii only

ii and iii only

i, ii, iii and iv only

all five Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Refraction Of Light Through Plane And Curved Surfaces

Wo Idahun

Ibeere 47 Ìròyìn

A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the velocity of sound in air if the cliff is 680m away?

170ms^-1

136ms^-1

340ms^-1 Ìdáhùn tó tọ́

680ms^-1

510ms^-1

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Electrostatics (JAMB)

Electrostatics

Wo Idahun

Ibeere 48 Ìròyìn

The visible part of light consists of the following colours

red, indigo, infra-red, violet, yellow, green and blue

red, green, blue, violet, indigo, orange and yellow Ìdáhùn tó tọ́

blue, ultra-violet, infra-red, red, yellow, indigo, violet,green and orange

infra-red and ultra-violet

red, orange, yellow, green, blue, indigo and infra-red

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Light Energy (JAMB)

Light Energy

Wo Idahun

Ibeere 49 Ìròyìn

An air force jet flying with a speed of 335ms-1 went past an anti-aircraft gun. How far is the aircraft 5s later when the gun was fired?

838m

3350m

670m

1675m Ìdáhùn tó tọ́

67m

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Motion (JAMB)

Motion

Wo Idahun

Ibeere 50 Ìròyìn

The electric supply from Kainji Dam is transmitted at high voltages of the order hundreds of kilovolts but is converted to domestic use of about 220 volts by

commutators

transistors

valves and diodes

rectifiers

transformers Ìdáhùn tó tọ́

Awọn alaye Idahun

Ka ìwé ẹ̀kọ́ nípa Current Electricity (JAMB)

Ka ìwé ẹ̀kọ́ nípa Simple A.C Circuits (JAMB)

Current Electricity

Simple A.C Circuits

Wo Idahun






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