JAMB UTME - Physics - 1980 | Green Bridge CBT

Ibeere 1 Ìròyìn

Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is

0.30

0.60

1.67

2.33

2.36

Refraction Of Light Through At Plane And Curved

Wo Idahun

Ibeere 2 Ìròyìn

If the volume of a fixed mass of a gas is kept constant, the pressure of the gas

is inversely proprotional to its centigrade temperature

is inversely proportional to its absolute temperature

is directly proportional to its centigrade temperature

is directly proportional to its absolute temperature

remains constant also

Gas Laws

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Ibeere 3 Ìròyìn

The best material for the core of the primary and secondary coils of an induction coil is

copper, because it has a good conductor of electricity

steel, because it becomes magnetic and retains its magnetism for a long time

rubber, because it is a good insulator and the user is prevented from shock

soft iron, because it becomes magnetic but easily loses its magnetism

glass, because it is transparent

Electric Field

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Ibeere 4 Ìròyìn

a pressure cooker saves both time and fuel in cooking because inside the cooker, the

boiling point of water is raised

pressure is constant

heat is completely trapped

temperature is evenly distributed

volume of steam varies

Pressure

Wo Idahun

Ibeere 5 Ìròyìn

A stand-by generator is connected to fifteen 40 W lamps and musician's 600 W amplifying system. How much energy is used if the generator runs for 6 hours?

3.84k Wh

7.20k Wh

8.40k Wh

12.00k Wh

14.56k Wh

Electrical Energy And Power

Heat Energy

Wo Idahun

Ibeere 6 Ìròyìn

Which of the following is true of an electrical charge?

positive charge means deficit electrons

negative charge means excess of electrons

electric current means movement of electrons

all of the above

A and B only

Electrostatics

Wo Idahun

Ibeere 7 Ìròyìn

In a compound microscope

there is only one lens

the objective lens have a shorter focal length than the eyepiece which is convex

the objective lens has a longer focal length than the eyepiece which is convex

the objective lens has a shorter focal length than the eyepiece which is concave

the objective and the eyepiece are both convex and have the same focal length

Structure Of The Atom (Nigeria Only)

Wo Idahun

Ibeere 8 Ìròyìn

What is the relative permitivity of a capacitor if its capacitance with a medium as dielectric is 16 farads and its capacitance with vacuum as dielectric is 2 farads?

o

\frac{1}{2}

2

8

32

Capacitors

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Ibeere 9 Ìròyìn

The motion of the moving skin of a talking drum can rightly be described as

translational

random

rotational

oscillatory

transitory

Motion

Wo Idahun

Ibeere 10 Ìròyìn

In the study of physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two element?

temperature is a measure of the average kinetic energy of the molecules of a substance

heat is a measure of the total kinetic energy of the molecules in a system

different materials require different amounts of heat to cause a given change in temperature

all of the above

A and B only

Temperature And Its Measurement

Wo Idahun

Ibeere 11 Ìròyìn

Which of the following statements about sound is NOT true?

sound is a longitudinal wave

sound can be reflected and refracted like light

sound travels through a vacuum

sound moves faster in a steel wire than in air

sound can ony be produced by vibrating objects

Sound Waves

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Ibeere 12 Ìròyìn

Heat is supplied to a block of ice 0^o until half of it has melted. Which of the following statements is true?

the temperature rises and the ice exoands

the temperature remains constant and the volume of ice decreases

the ice gives out heat as it melts

the mass remains constant and the temperature increases

the mass decreases because some heat is lost to the atmosphere

Heat Energy

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Ibeere 13 Ìròyìn

The water at the bottom of a waterfall is slightly warmer than that at the top because part of the

potential energy raises the water temperature

water absorbs latent heat from the atmosphere

kinetic energy is changed intyo internal energy

dropping mass of water increases the heat capacity

A and C above

Quantity Of Heat

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Ibeere 14 Ìròyìn

The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9, 19.3, 10.5. A metal ornament which weighs 0.425kg and can displace 50 x 10^-6m³m of water is made of

zinc

brass

copper

gold

silver

Position, Distance And Displacement

Measurements And Units

Wo Idahun

Ibeere 15 Ìròyìn

Which of the following statements on the use of X-rays is incorrect? X-rays are used

in hospitals to obtain photogaphs of tissues and bones in the body

for the treatment of malignant growths like cancer cells

in detecting fingerprints

to reveal hidden flaws in metal castings and welded joints

to detect alternations which have been made to works of art

Equilibrium Of Forces

Electromagnetic Waves: Types Of Radiation In Elect

Electromagnetic Field (Part 2)

Wo Idahun

Ibeere 16 Ìròyìn

The Diagram above shows the prism arrangement in a

Microscope

tereoscope

projector

periscope

gyroscope

Reflection Of Light At Plane And Curved Surfaces

Wo Idahun

Ibeere 17 Ìròyìn

A cell has an open circuit voltage V₁ and a closed circuit voltage V₂ when a current is flowing through it. Therefore, the internal resistance of the cell is

\frac{V_2}{I}

\frac{V_1}{I}

\frac{(V_1 + V_2)}{I}

\frac{(V_1 - V_2)}{I}

\frac{(V_2 - V_1)}{I}

Capacitors

Wo Idahun

Ibeere 18 Ìròyìn

Which of the following radiations cannot be deflected by a magnetic field?

\alpha

\beta

\gamma

\beta

and

\gamma

none of them

Electric Field

Magnetic Field (Part 1)

Electromagnetic Field (Part 2)

Wo Idahun

Ibeere 19 Ìròyìn

which of the following does NOT cause a reduction of the surface tension of water?

soap solution

detergent

alcohol

camphor

grease

Wo Idahun

Ibeere 20 Ìròyìn

A quantity of sungas at -133 occupies 1/3m³ under pressure 1.4 x 10⁵ Nm^-2. if the gas occupies 31 m^-2 at 37^oC, its pressure will be

1.26 x 10³Nm^-2

3.3 x10⁴Nm^-2

1.35 x 10⁴Nm^-2

2.2 x 10⁴Nm^-2

10⁵Nm^-2

Pressure

Wo Idahun

Ibeere 21 Ìròyìn

Which of the following physical quantities is NOT a vector?

velocity

work

force

electric field intensity

magnetic induction

Scalars And Vectors

Electric Field

Gravitational Field

Wo Idahun

Ibeere 22 Ìròyìn

Which of the following statements is NOT true of the image in a plane mirror? The image is

the same size as the object

laterally inverted

virtual

magnified

the same distance behind the mirror as the object is in front

Reflection Of Light At Plane And Curved Surfaces

Wo Idahun

Ibeere 23 Ìròyìn

In the diagram above, a ray of light passes from glass into air, if the angle of incidence in glass is a and angle of refraction in air is $\beta$ which of following statements is true???

\alpha = \beta

the efractive index of glass is

\frac{sin\theta}{sin\alpha}

The ray suffers total internal reflection if

\beta

is greater than the critical angle

the efractive index of glass is

\frac{sin\alpha}{sin\beta}

Electromagnetic Waves: Types Of Radiation In Elect

Wo Idahun

Ibeere 24 Ìròyìn

What is the total resistance in the above diagram

5 ohms

15 ohms

25 ohms

35 ohms

45 ohms

Capacitors

Wo Idahun

Ibeere 25 Ìròyìn

Any line or section through an advancing wave in which all the particles are in the same phase is called the

wave lenght

wave crest

wave trough

wave amplitude

wave front

Refraction Of Light Through At Plane And Curved

Magnetic Field (Part 1)

Properties Of Waves: Reflection, Refraction, Diffraction

Wo Idahun

Ibeere 26 Ìròyìn

If the magnification of a virtual image formed of an object 10cm from a convex lens is 3, then the focal length of the lens is

10cm

15cm

16cm

19cm

20cm

Electromagnetic Field (Part 2)

Wo Idahun

Ibeere 27 Ìròyìn

A given quantity of heat increases the temperature of 150grams of water from 9^oC to 15^oC and increases the temperature of oil of 100grams from 9^oC to 25^oC. The ratio of the specific heat of oil to that of water is

0.36

0.46

0.56

0.76

0.86

Quantity Of Heat

Temperature And Its Measurement

Wo Idahun

Ibeere 28 Ìròyìn

a calorimeter of thermal capacity 80j contains 20g of water at 25^oC. Water at 100^oC is added so that the final temperature of the set-ups is 50^oC. The amount of water added is (Heat capacity of water = 4.18J/g/^oC)

20g

25g

45g

50g

100g

Quantity Of Heat

Wo Idahun

Ibeere 29 Ìròyìn

In the diagram above, MN is perpendicular to ON and MR what is the difference between the moment about N of the force of 20 Newtons applied along MP an its moment about 0

Zero

0.2N.m

0.4N.m

0.8N.m

0.6N.m

Scalars And Vectors

Simple A.C Circuits

Equilibrium Of Forces

Wo Idahun

Ibeere 30 Ìròyìn

A tugboat is travelling from Asaba to Onitsha across the River Niger with a resultant velocity of 20 knots. If the river flows at 12 knots, the direction of motion of the boat relative to the direction of water flow is

36.87^oC

53.13^oC

90^oC

136^oC

143.13^oC

Motion

Wo Idahun

Ibeere 31 Ìròyìn

Which of the following statements are true of the law of universal gravitation?

any two bodies attract each other with a force which is proportional to the difference of their masses

any two bodies attract each other with a force which is inversely proportional to the square of the distance between them

any two bodies attract each other with a force which is proportional to the product of their masses and inversely proportional to the square of the distance between them

any two bodies attract each other with a force which is proportional to the square of the distance between them

any two bodies attract each other with a force which is proportional to the sum of their masses

Wo Idahun

Ibeere 32 Ìròyìn

Which of the following are true of atom?

atoms are indestructible

all atoms of a pure substance, or elements are identical

atoms of different substance have different weights

all of the above

A and B only

Wave-particle Paradox

Structure Of The Atom (Nigeria Only)

Wo Idahun

Ibeere 33 Ìròyìn

According to Ohm's law, the ratio V/I is constant for

an electrolyte

a diode

a transistor

silver

all of the above

Current Electricity

Electrostatics

Wo Idahun

Ibeere 34 Ìròyìn

The total capacitance of the circuit above is

0.25mF

0.50mF

0.75mF

1.25mF

1.50mF

Capacitors

Reflection Of Light At Plane And Curved Surfaces

Thermal Expansion

Simple A.C Circuits

Structure Of Matter And Kinetic Theory

Wo Idahun

Ibeere 35 Ìròyìn

The name given to the characteristics behaviour of substances which set their length perpendicular to a strong magnetic field instead of in line with it is

magnetization

paramagnetism

diamagnetism

demagnetization

ferromagnetism

Magnets And Magnetic Fields

Wo Idahun

Ibeere 36 Ìròyìn

In sunlight, a blue flower looks blue because we see the flower by the light it

recieves from our eye

disperses

absorbs

refracts

reflects

Wo Idahun

Ibeere 37 Ìròyìn

The activity of a radioactive substance depends on

temperature and purity

temperature and age

purity and age

age, purity and temperature

none of the above

Description Property Of Fields

Electric Field

Wo Idahun

Ibeere 38 Ìròyìn

Which of the following elements is the best absorber of X-rays?

hydrogen

oxygen

calcium

copper

lead

Structure Of The Atom (Nigeria Only)

Wo Idahun

Ibeere 39 Ìròyìn

A magnet is similar to a bipolar charged system in that

it consists of two opposite poles - the north and south poles

the earth's magnetic field has a south pole near the geographical north pole and a north pole near the geographical south pole

the force of attraction and repulsion between opposite and between like poles obeys a law for electrostatic charges

A and B only

A and C only

Magnets And Magnetic Fields

Wo Idahun

Ibeere 40 Ìròyìn

High Tension(H.T.) transmission means

to transmit a given amount of power, the tension in the conducting wire must be high

heat is not lost when current is passed through a conductor

heat is gained when a given power is transmitted

a big transformer is required to transmit power

trasmission of power at low current and high voltage

Simple A.C. Circuits

Structure Of The Atom (Nigeria Only)

Electromagnetic Field (Part 2)

Electromagnetic Field (Part 1)

Wo Idahun

Ibeere 41 Ìròyìn

Which of the following statements are true in the structure of atoms?

the atoms of the differnt element differ only in the number of protons and electrons

the num,ber of protons equals the number of electrons

atoms are constructed according to the plan of our solar system

all of the above

A and C only

Structure Of The Atom (Nigeria Only)

Wo Idahun

Ibeere 42 Ìròyìn

An object of mass m and volume v, is totally immersed in a liquid of density p. The tension of a string holding it is

mg

(m + pv)g

(m - pv)g

pvg

[M/m-pv]g

Motion

Simple A.C Circuits

Wo Idahun

Ibeere 43 Ìròyìn

A milliameter of resistance 5 $\Omega$ and full scale deflection of 5m A is to used to measure a potential difference of 50 V. The resistance of the multiplier should be

95

\Omega

110

\Omega

595

\Omega

995

\Omega

1005

\Omega

Electrostatics

Wo Idahun

Ibeere 44 Ìròyìn

In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the

same in sign and quantity

same in sign but greater

opposite in sign but greater

opposite in sign but less

opposite in sign but equal

Electrostatics

Wo Idahun

Ibeere 45 Ìròyìn

What is the acceleration of a particle whose motion is graphically displayed in the diagram above

0.67ms^-2

0.83^-2

0.87^-2

92^-2

2.0^-2

Motion

Wo Idahun

Ibeere 46 Ìròyìn

Natural radioactivity consists of the emission of

\alpha

-particle and

\beta

rays

\alpha

-particle and X-rays

\gamma

-rays and X-rays

\alpha

-particle,

\beta

rays and

\gamma

-rays

\alpha

-particle,

\beta

rays,

\gamma

-rays and X-rays

Electromagnetic Field (Part 2)

Wo Idahun

Ibeere 47 Ìròyìn

A man stands one-third of the way between two walls and claps his hands, He hears two distinct echoes 1s apart. If the speed of sound is 330ms^-1 the distance between the wall is

33m

110m

220m

330m

495m

Motion

Wo Idahun

Ibeere 48 Ìròyìn

the ratio of the linear expansivity of copper to that of iron is approximately 1.5. A specimen of iron and a specimen of copper expands by the same amount per unit rise in temperature. The ratio of their length is

3

1.5

1.32

1

0.67

Scalars And Vectors

Thermal Expansion

Wo Idahun






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