JAMB UTME - Physics - 1978 | Green Bridge CBT

Question 1 Rapport

A temperature 20^oC is the same as

36^oF

60^oF Bonne réponse

11.1^oF

43.1^oF

25^oF

Détails de la réponse

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

Temperature And Its Measurement

Voir la réponse

Question 2 Rapport

The equivalent capacitance for the circuit drawn above is

18µf

4µf Bonne réponse

2µf

12µf

13µf

Détails de la réponse

Lisez la note de cours sur Capacitors (JAMB)

Capacitors

Voir la réponse

Question 3 Rapport

In The Diagram, what is the value of W?

10N Bonne réponse

15N

20N

30N

Détails de la réponse

Voir la réponse

Question 4 Rapport

In order to convert a galvanometer into an ammeter

a low resistance shunt is connected in parallel Bonne réponse

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

Détails de la réponse

Lisez la note de cours sur Current Electricity (JAMB)

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

Lisez la note de cours sur Motion (JAMB)

Current Electricity

Properties Of Waves: Reflection, Refraction, Diffraction

Motion

Voir la réponse

Question 5 Rapport

The angular dispersion of a prism depends on

the index of refraction only Bonne réponse

the angle of incidence as well as the index of refraction

the angle of incidence only

the thickness of the prism

the prism angle

Détails de la réponse

Voir la réponse

Question 6 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Friction (JAMB)

Lisez la note de cours sur Pressure (JAMB)

Friction

Pressure

Voir la réponse

Question 7 Rapport

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 Bonne réponse

conductivity

Détails de la réponse

Lisez la note de cours sur Scalars And Vectors (JAMB)

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

Scalars And Vectors

Temperature And Its Measurement

Voir la réponse

Question 8 Rapport

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 Bonne réponse

the waves are longitudinal

the frequency is directly proportional to the length of the string

Détails de la réponse

Voir la réponse

Question 9 Rapport

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 Bonne réponse

none of the above

Détails de la réponse

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

Magnets And Magnetic Fields

Voir la réponse

Question 10 Rapport

Of the following which is different from the other?

x-rays

gamma-rays

cathode rays Bonne réponse

ultra violet rays

infrared rays

Détails de la réponse

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

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

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

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

Lisez la note de cours sur 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

Voir la réponse

Question 11 Rapport

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

less than R₁ Bonne réponse

greater than R₂

the sum of R₁ and R₂

the difference of R₂ and R₁

greater thanR₁ but less than R₂

Détails de la réponse

Lisez la note de cours sur Scalars And Vectors (JAMB)

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

Scalars And Vectors

Equilibrium Of Forces

Voir la réponse

Question 12 Rapport

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 Bonne réponse

Détails de la réponse

Voir la réponse

Question 13 Rapport

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 Bonne réponse

none of these is correct

Détails de la réponse

Lisez la note de cours sur Electrostatics (JAMB)

Electrostatics

Voir la réponse

Question 14 Rapport

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 Bonne réponse

ii, iii and vi

i, iii and vi

i, iii and v

i, iv and v

Détails de la réponse

Lisez la note de cours sur Friction (JAMB)

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

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

Friction

Quantity Of Heat

Temperature And Its Measurement

Voir la réponse

Question 15 Rapport

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 Bonne réponse

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

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 16 Rapport

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 Bonne réponse

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

Détails de la réponse

Lisez la note de cours sur Friction (JAMB)

Lisez la note de cours sur Fluid At Rest (WAEC)

Friction

Fluid At Rest

Voir la réponse

Question 17 Rapport

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 Bonne réponse

2 msec^-1

4 msec^-1

Détails de la réponse

Lisez la note de cours sur Newton’s Laws Of Motion (WAEC)

Newton’s Laws Of Motion

Voir la réponse

Question 18 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Capacitors (JAMB)

Lisez la note de cours sur Simple A.C Circuits (JAMB)

Capacitors

Simple A.C Circuits

Voir la réponse

Question 19 Rapport

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 Bonne réponse

67m

Détails de la réponse

Lisez la note de cours sur Motion (JAMB)

Motion

Voir la réponse

Question 20 Rapport

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

10W

20W

40W

80W Bonne réponse

None of the above

Détails de la réponse

Lisez la note de cours sur Current Electricity (JAMB)

Lisez la note de cours sur Simple A.C Circuits (JAMB)

Current Electricity

Simple A.C Circuits

Voir la réponse

Question 21 Rapport

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 Bonne réponse

Détails de la réponse

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

Lisez la note de cours sur Pressure (JAMB)

Lisez la note de cours sur Measurements And Units (JAMB)

Characteristics Of Sound Waves

Pressure

Measurements And Units

Voir la réponse

Question 22 Rapport

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 Bonne réponse

iii and iv only

iv and v only

iii, iv and v only

Détails de la réponse

Lisez la note de cours sur Position, Distance And Displacement (WAEC)

Lisez la note de cours sur Vapours (JAMB)

Lisez la note de cours sur Pressure (JAMB)

Position, Distance And Displacement

Vapours

Pressure

Voir la réponse

Question 23 Rapport

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

24k Bonne réponse

55k

40k

26k

32k

Détails de la réponse

Voir la réponse

Question 24 Rapport

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 Bonne réponse

6 x 10^-3

0.6

Détails de la réponse

Lisez la note de cours sur Elasticity (JAMB)

Elasticity

Voir la réponse

Question 25 Rapport

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 Bonne réponse

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 26 Rapport

The angular dispersion of a prism depends on

the index of refraction only Bonne réponse

the angle of incidence as well as the index of refraction

the angle of incidence only

the thickness of the prism

the prism angle

Détails de la réponse

Lisez la note de cours sur Electrostatics (JAMB)

Electrostatics

Voir la réponse

Question 27 Rapport

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 Bonne réponse

all of the above

Détails de la réponse

Lisez la note de cours sur Electrostatics (JAMB)

Electrostatics

Voir la réponse

Question 28 Rapport

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 Bonne réponse

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

2km N 75^oE

Détails de la réponse

Lisez la note de cours sur Scalars And Vectors (JAMB)

Lisez la note de cours sur Position, Distance And Displacement (WAEC)

Scalars And Vectors

Position, Distance And Displacement

Voir la réponse

Question 29 Rapport

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

Thermal energy Bonne réponse

thermal conduction

heat loss

specific heat capacity

thermal capacity

Détails de la réponse

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

Temperature And Its Measurement

Voir la réponse

Question 30 Rapport

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 Bonne réponse

1.18 PN-m^-2

2.85 PN-m^-2

Détails de la réponse

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

Quantity Of Heat

Voir la réponse

Question 31 Rapport

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 Bonne réponse

400 cal

Détails de la réponse

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

Quantity Of Heat

Voir la réponse

Question 32 Rapport

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 Bonne réponse

24A

10A

Détails de la réponse

Lisez la note de cours sur Capacitors (JAMB)

Lisez la note de cours sur Current Electricity (JAMB)

Lisez la note de cours sur Concepts Of Matter (WAEC)

Capacitors

Current Electricity

Concepts Of Matter

Voir la réponse

Question 33 Rapport

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 Bonne réponse

680ms^-1

510ms^-1

Détails de la réponse

Lisez la note de cours sur Electrostatics (JAMB)

Electrostatics

Voir la réponse

Question 34 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Current Electricity (JAMB)

Lisez la note de cours sur Electrical Energy And Power (JAMB)

Current Electricity

Electrical Energy And Power

Voir la réponse

Question 35 Rapport

The heat from the sun reaches the earth by the process

insulation

precipitation

conduction

convection

radiation Bonne réponse

Détails de la réponse

Lisez la note de cours sur Heat Energy (WAEC)

Heat Energy

Voir la réponse

Question 36 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Gravitational Field (JAMB)

Gravitational Field

Voir la réponse

Question 37 Rapport

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 Bonne réponse

the voltage supply can be stabilized

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

Détails de la réponse

Lisez la note de cours sur Electrostatics (JAMB)

Electrostatics

Voir la réponse

Question 38 Rapport

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 Bonne réponse

Détails de la réponse

Lisez la note de cours sur Current Electricity (JAMB)

Lisez la note de cours sur Simple A.C Circuits (JAMB)

Current Electricity

Simple A.C Circuits

Voir la réponse

Question 39 Rapport

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

Ib, ft, sec

g, m, sec

kg, m, sec Bonne réponse

cm, g, sec

kg, cm, sec

Détails de la réponse

Lisez la note de cours sur Fundamental And Derived Quantities And Units (WAEC)

Fundamental And Derived Quantities And Units

Voir la réponse

Question 40 Rapport

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

field magnet

commutator Bonne réponse

armature

slip rings

carbon brushes

Détails de la réponse

Lisez la note de cours sur Capacitors (JAMB)

Lisez la note de cours sur Simple A.C. Circuits (WAEC)

Lisez la note de cours sur Simple A.C Circuits (JAMB)

Capacitors

Simple A.C. Circuits

Simple A.C Circuits

Voir la réponse

Question 41 Rapport

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

75cm

150cm Bonne réponse

37.5cm

112cm

50cm

Détails de la réponse

Voir la réponse

Question 42 Rapport

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 Bonne réponse

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

the solid is no longer in equilibrium with water

Détails de la réponse

Lisez la note de cours sur Gravitational Field (WAEC)

Lisez la note de cours sur Speed And Velocity (WAEC)

Gravitational Field

Speed And Velocity

Voir la réponse

Question 43 Rapport

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 Bonne réponse

Détails de la réponse

Voir la réponse

Question 44 Rapport

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 Bonne réponse

Détails de la réponse

Voir la réponse

Question 45 Rapport

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 Bonne réponse

none of the above is correct

Détails de la réponse

Lisez la note de cours sur Sound Waves (WAEC)

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

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

Lisez la note de cours sur Electrostatics (JAMB)

Sound Waves

Refraction Of Light Through Plane And Curved Surfaces