JAMB UTME - Physics - 1978 | Green Bridge CBT

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 Resposta correta

Detalhes da Resposta

Ler a nota de aula em Current Electricity (JAMB)

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

Current Electricity

Simple A.C Circuits

Ver Resposta

Pergunta 5 Relatório

To determine the weight of an object you could

use a beam balance

use a spring balance

find the force necessary

use none of these methods

use any of these methods Resposta correta

Detalhes da Resposta

Ler a nota de aula em Time (WAEC)

Ler a nota de aula em Measurements And Units (JAMB)

Time

Measurements And Units

Ver Resposta

Pergunta 6 Relatório

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 Resposta correta

none of the above

Detalhes da Resposta

Ler a nota de aula em Magnets And Magnetic Fields (JAMB)

Magnets And Magnetic Fields

Ver Resposta

Pergunta 7 Relatório

The equivalent capacitance for the circuit drawn above is

18µf

4µf Resposta correta

2µf

12µf

13µf

Detalhes da Resposta

Ler a nota de aula em Capacitors (JAMB)

Capacitors

Ver Resposta

Pergunta 8 Relatório

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 Resposta correta

Detalhes da Resposta

Ver Resposta

Pergunta 9 Relatório

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 Resposta correta

Detalhes da Resposta

Ler a nota de aula em Capacitors (JAMB)

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

Capacitors

Simple A.C Circuits

Ver Resposta

Pergunta 10 Relatório

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 Resposta correta

Detalhes da Resposta

Ver Resposta

Pergunta 11 Relatório

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 Resposta correta

the waves are longitudinal

the frequency is directly proportional to the length of the string

Detalhes da Resposta

Ver Resposta

Pergunta 12 Relatório

A temperature 20^oC is the same as

36^oF

60^oF Resposta correta

11.1^oF

43.1^oF

25^oF

Detalhes da Resposta

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

Temperature And Its Measurement

Ver Resposta

Pergunta 13 Relatório

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

24k Resposta correta

55k

40k

26k

32k

Detalhes da Resposta

Ver Resposta

Pergunta 14 Relatório

For the correction of myopic defects in the human eye we require

a convex lens

a concave lens Resposta correta

a combination of concave and convex lenses

a prism

a concave mirror

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 15 Relatório

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

field magnet

commutator Resposta correta

armature

slip rings

carbon brushes

Detalhes da Resposta

Ler a nota de aula em Capacitors (JAMB)

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

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

Capacitors

Simple A.C. Circuits

Simple A.C Circuits

Ver Resposta

Pergunta 16 Relatório

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 Resposta correta

the voltage supply can be stabilized

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

Detalhes da Resposta

Ler a nota de aula em Electrostatics (JAMB)

Electrostatics

Ver Resposta

Pergunta 17 Relatório

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

10W

20W

40W

80W Resposta correta

None of the above

Detalhes da Resposta

Ler a nota de aula em Current Electricity (JAMB)

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

Current Electricity

Simple A.C Circuits

Ver Resposta

Pergunta 18 Relatório

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 Resposta correta

Detalhes da Resposta

Ver Resposta

Pergunta 19 Relatório

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

Thermal energy Resposta correta

thermal conduction

heat loss

specific heat capacity

thermal capacity

Detalhes da Resposta

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

Temperature And Its Measurement

Ver Resposta

Pergunta 20 Relatório

The angular dispersion of a prism depends on

the index of refraction only Resposta correta

the angle of incidence as well as the index of refraction

the angle of incidence only

the thickness of the prism

the prism angle

Detalhes da Resposta

Ler a nota de aula em Electrostatics (JAMB)

Electrostatics

Ver Resposta

Pergunta 21 Relatório

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 Resposta correta

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

the solid is no longer in equilibrium with water

Detalhes da Resposta

Ler a nota de aula em Gravitational Field (WAEC)

Ler a nota de aula em Speed And Velocity (WAEC)

Gravitational Field

Speed And Velocity

Ver Resposta

Pergunta 22 Relatório

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 Resposta correta

Detalhes da Resposta

Ler a nota de aula em Friction (JAMB)

Ler a nota de aula em Pressure (JAMB)

Friction

Pressure

Ver Resposta

Pergunta 23 Relatório

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 Resposta correta

6 x 10^-3

0.6

Detalhes da Resposta

Ler a nota de aula em Elasticity (JAMB)

Elasticity

Ver Resposta

Pergunta 24 Relatório

In The Diagram, what is the value of W?

10N Resposta correta

15N

20N

30N

Detalhes da Resposta

Ver Resposta

Pergunta 25 Relatório

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

Ib, ft, sec

g, m, sec

kg, m, sec Resposta correta

cm, g, sec

kg, cm, sec

Detalhes da Resposta

Ler a nota de aula em Fundamental And Derived Quantities And Units (WAEC)

Fundamental And Derived Quantities And Units

Ver Resposta

Pergunta 26 Relatório

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 Resposta correta

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

Detalhes da Resposta

Ler a nota de aula em Friction (JAMB)

Ler a nota de aula em Fluid At Rest (WAEC)

Friction

Fluid At Rest

Ver Resposta

Pergunta 27 Relatório

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

less than R₁ Resposta correta

greater than R₂

the sum of R₁ and R₂

the difference of R₂ and R₁

greater thanR₁ but less than R₂

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 28 Relatório

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 Resposta correta

conductivity

Detalhes da Resposta

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

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

Scalars And Vectors

Temperature And Its Measurement

Ver Resposta

Pergunta 29 Relatório

Of the following which is different from the other?

x-rays

gamma-rays

cathode rays Resposta correta

ultra violet rays

infrared rays

Detalhes da Resposta

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

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

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

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

Ler a nota de aula em 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

Ver Resposta

Pergunta 30 Relatório

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 Resposta correta

none of these is correct

Detalhes da Resposta

Ler a nota de aula em Electrostatics (JAMB)

Electrostatics

Ver Resposta

Pergunta 31 Relatório

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 Resposta correta

ii, iii and vi

i, iii and vi

i, iii and v

i, iv and v

Detalhes da Resposta

Ler a nota de aula em Friction (JAMB)

Ler a nota de aula em Quantity Of Heat (JAMB)

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

Friction

Quantity Of Heat

Temperature And Its Measurement

Ver Resposta

Pergunta 32 Relatório

The angular dispersion of a prism depends on

the index of refraction only Resposta correta

the angle of incidence as well as the index of refraction

the angle of incidence only

the thickness of the prism

the prism angle

Detalhes da Resposta

Ver Resposta

Pergunta 33 Relatório

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 Resposta correta

Detalhes da Resposta

Ler a nota de aula em Gravitational Field (JAMB)

Gravitational Field

Ver Resposta

Pergunta 34 Relatório

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 Resposta correta

2 msec^-1

4 msec^-1

Detalhes da Resposta

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

Newton’s Laws Of Motion

Ver Resposta

Pergunta 35 Relatório

The heat from the sun reaches the earth by the process

insulation

precipitation

conduction

convection

radiation Resposta correta

Detalhes da Resposta

Ler a nota de aula em Heat Energy (WAEC)

Heat Energy

Ver Resposta

Pergunta 36 Relatório

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 Resposta correta

24A

10A

Detalhes da Resposta

Ler a nota de aula em Capacitors (JAMB)

Ler a nota de aula em Current Electricity (JAMB)

Ler a nota de aula em Concepts Of Matter (WAEC)

Capacitors

Current Electricity

Concepts Of Matter

Ver Resposta

Pergunta 37 Relatório

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 Resposta correta

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

2km N 75^oE

Detalhes da Resposta

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

Ler a nota de aula em Position, Distance And Displacement (WAEC)

Scalars And Vectors

Position, Distance And Displacement

Ver Resposta

Pergunta 38 Relatório

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

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

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

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

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

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

Detalhes da Resposta

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

Equilibrium Of Forces

Ver Resposta

Pergunta 39 Relatório

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 Resposta correta

400 cal

Detalhes da Resposta

Ler a nota de aula em Quantity Of Heat (JAMB)

Quantity Of Heat

Ver Resposta

Pergunta 40 Relatório

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 Resposta correta

Detalhes da Resposta

Ler a nota de aula em Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Refraction Of Light Through Plane And Curved Surfaces

Ver Resposta

Pergunta 41 Relatório

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 Resposta correta

1.18 PN-m^-2

2.85 PN-m^-2

Detalhes da Resposta

Ler a nota de aula em Quantity Of Heat (JAMB)

Quantity Of Heat

Ver Resposta

Pergunta 42 Relatório

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 Resposta correta

680ms^-1

510ms^-1

Detalhes da Resposta

Ler a nota de aula em Electrostatics (JAMB)

Electrostatics

Ver Resposta

Pergunta 43 Relatório

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 Resposta correta

all of the above

Detalhes da Resposta

Ler a nota de aula em Electrostatics (JAMB)

Electrostatics

Ver Resposta

Pergunta 44 Relatório

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 Resposta correta

67m

Detalhes da Resposta

Ler a nota de aula em Motion (JAMB)

Motion

Ver Resposta

Pergunta 45 Relatório

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 Resposta correta

none of the above is correct

Detalhes da Resposta

Ler a nota de aula em Sound Waves (WAEC)

Ler a nota de aula em Refraction Of Light Through Plane And Curved Surfaces (JAMB)

Ler a nota de aula em Propagation Of Sound Waves (JAMB)

Ler a nota de aula em Electrostatics (JAMB)

Sound Waves

Refraction Of Light Through Plane And Curved Surfaces

Propagation Of Sound Waves

Electrostatics

Ver Resposta

Pergunta 46 Relatório

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

75cm

150cm Resposta correta

37.5cm

112cm

50cm

Detalhes da Resposta

Ver Resposta

Pergunta 47 Relatório

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 Resposta correta

Detalhes da Resposta

Ler a nota de aula em Characteristics Of Sound Waves (JAMB)

Ler a nota de aula em Pressure (JAMB)

Ler a nota de aula em Measurements And Units (JAMB)

Characteristics Of Sound Waves

Pressure

Measurements And Units

Ver Resposta

Pergunta 48 Relatório

In order to convert a galvanometer into an ammeter

a low resistance shunt is connected in parallel Resposta correta

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

Detalhes da Resposta

Ler a nota de aula em Current Electricity (JAMB)

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

Ler a nota de aula em Motion (JAMB)

Current Electricity

Properties Of Waves: Reflection, Refraction, Diffraction

Motion

Ver Resposta

Pergunta 49 Relatório

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 Resposta correta

iii and iv only

iv and v only

iii, iv and v only

Detalhes da Resposta

Ler a nota de aula em Position, Distance And Displacement (WAEC)

Ler a nota de aula em Vapours (JAMB)

Ler a nota de aula em Pressure (JAMB)

Position, Distance And Displacement

Vapours

Pressure