JAMB UTME - Physics - 1980 | Green Bridge CBT

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

Detalhes da Resposta

Read lesson note on Quantity Of Heat (JAMB)

Read lesson note on Temperature And Its Measurement (JAMB)

Quantity Of Heat

Temperature And Its Measurement

Ver Resposta

Pergunta 7 Relatório

What is the total resistance in the above diagram

5 ohms

15 ohms

25 ohms

35 ohms

45 ohms

Detalhes da Resposta

Read lesson note on Capacitors (JAMB)

Capacitors

Ver Resposta

Pergunta 8 Relatório

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

hydrogen

oxygen

calcium

copper

lead

Detalhes da Resposta

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

Structure Of The Atom (Nigeria Only)

Ver Resposta

Pergunta 9 Relatório

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

Detalhes da Resposta

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

Refraction Of Light Through At Plane And Curved

Ver Resposta

Pergunta 10 Relatório

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

Detalhes da Resposta

Read lesson note on Sound Waves (WAEC)

Sound Waves

Ver Resposta

Pergunta 11 Relatório

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

Detalhes da Resposta

Read lesson note on Quantity Of Heat (JAMB)

Quantity Of Heat

Ver Resposta

Pergunta 12 Relatório

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

Detalhes da Resposta

Read lesson note on Pressure (JAMB)

Pressure

Ver Resposta

Pergunta 13 Relatório

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

an electrolyte

a diode

a transistor

silver

all of the above

Detalhes da Resposta

Read lesson note on Current Electricity (JAMB)

Read lesson note on Electrostatics (JAMB)

Current Electricity

Electrostatics

Ver Resposta

Pergunta 14 Relatório

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

Detalhes da Resposta

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

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

Read lesson note on Electromagnetic Field (Part 2) (WAEC)

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

Simple A.C. Circuits

Structure Of The Atom (Nigeria Only)

Electromagnetic Field (Part 2)

Electromagnetic Field (Part 1)

Ver Resposta

Pergunta 15 Relatório

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

Detalhes da Resposta

Read lesson note on Heat Energy (WAEC)

Heat Energy

Ver Resposta

Pergunta 16 Relatório

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?

\(\frac{1}{2}\)

Detalhes da Resposta

Read lesson note on Capacitors (JAMB)

Capacitors

Ver Resposta

Pergunta 17 Relatório

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

Detalhes da Resposta

Read lesson note on Gas Laws (JAMB)

Gas Laws

Ver Resposta

Pergunta 18 Relatório

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

Detalhes da Resposta

Read lesson note on Temperature And Its Measurement (JAMB)

Temperature And Its Measurement

Ver Resposta

Pergunta 19 Relatório

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

Detalhes da Resposta

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

Structure Of The Atom (Nigeria Only)

Ver Resposta

Pergunta 20 Relatório

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

Detalhes da Resposta

Read lesson note on Electrostatics (JAMB)

Electrostatics

Ver Resposta

Pergunta 21 Relatório

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

Detalhes da Resposta

Read lesson note on Quantity Of Heat (JAMB)

Quantity Of Heat

Ver Resposta

Pergunta 22 Relatório

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

Detalhes da Resposta

Read lesson note on Scalars And Vectors (JAMB)

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

Read lesson note on Equilibrium Of Forces (WAEC)

Scalars And Vectors

Simple A.C Circuits

Equilibrium Of Forces

Ver Resposta

Pergunta 23 Relatório

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

Detalhes da Resposta

Read lesson note on Equilibrium Of Forces (JAMB)

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

Read lesson note on Electromagnetic Field (Part 2) (WAEC)

Equilibrium Of Forces

Electromagnetic Waves: Types Of Radiation In Elect

Electromagnetic Field (Part 2)

Ver Resposta

Pergunta 24 Relatório

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

1.5

1.32

0.67

Detalhes da Resposta

Read lesson note on Scalars And Vectors (JAMB)

Read lesson note on Thermal Expansion (JAMB)

Scalars And Vectors

Thermal Expansion

Ver Resposta

Pergunta 25 Relatório

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

Detalhes da Resposta

Read lesson note on Description Property Of Fields (WAEC)

Read lesson note on Electric Field (WAEC)

Description Property Of Fields

Electric Field

Ver Resposta

Pergunta 26 Relatório

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

(m + pv)g

(m - pv)g

pvg

[M/m-pv]g

Detalhes da Resposta

Read lesson note on Motion (JAMB)

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

Motion

Simple A.C Circuits

Ver Resposta

Pergunta 27 Relatório

Which of the following physical quantities is NOT a vector?

velocity

work

force

electric field intensity

magnetic induction

Detalhes da Resposta

Read lesson note on Scalars And Vectors (JAMB)

Read lesson note on Electric Field (WAEC)

Read lesson note on Gravitational Field (WAEC)

Scalars And Vectors

Electric Field

Gravitational Field

Ver Resposta

Pergunta 28 Relatório

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

Detalhes da Resposta

Read lesson note on Electromagnetic Field (Part 2) (WAEC)

Electromagnetic Field (Part 2)

Ver Resposta

Pergunta 29 Relatório

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

Detalhes da Resposta

Read lesson note on Motion (JAMB)

Motion

Ver Resposta

Pergunta 30 Relatório

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 \( \frac{sin\alpha}{sin\beta} \)

Detalhes da Resposta

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

Electromagnetic Waves: Types Of Radiation In Elect

Ver Resposta

Pergunta 31 Relatório

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\(\Omega\)

Detalhes da Resposta

Read lesson note on Electrostatics (JAMB)

Electrostatics

Ver Resposta

Pergunta 32 Relatório

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

Detalhes da Resposta

Read lesson note on Electrostatics (JAMB)

Electrostatics

Ver Resposta

Pergunta 33 Relatório

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

Detalhes da Resposta

Read lesson note on Magnets And Magnetic Fields (JAMB)

Magnets And Magnetic Fields

Ver Resposta

Pergunta 34 Relatório

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

Detalhes da Resposta

Ver Resposta

Pergunta 35 Relatório

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

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

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

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

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

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

Detalhes da Resposta

Read lesson note on Capacitors (JAMB)

Capacitors

Ver Resposta

Pergunta 36 Relatório

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

Detalhes da Resposta

Read lesson note on Motion (JAMB)

Motion

Ver Resposta

Pergunta 37 Relatório

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

Detalhes da Resposta

Read lesson note on Electrical Energy And Power (JAMB)

Read lesson note on Heat Energy (WAEC)

Electrical Energy And Power

Heat Energy

Ver Resposta

Pergunta 38 Relatório

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

Detalhes da Resposta

Read lesson note on Magnets And Magnetic Fields (JAMB)

Magnets And Magnetic Fields

Ver Resposta

Pergunta 39 Relatório

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

soap solution

detergent

alcohol

camphor

grease

Detalhes da Resposta

Ver Resposta

Pergunta 40 Relatório

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

Detalhes da Resposta

Read lesson note on Wave-particle Paradox (WAEC)

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

Wave-particle Paradox

Structure Of The Atom (Nigeria Only)

Ver Resposta

Pergunta 41 Relatório

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

Detalhes da Resposta

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

Structure Of The Atom (Nigeria Only)

Ver Resposta

Pergunta 42 Relatório

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

Detalhes da Resposta

Read lesson note on Electromagnetic Field (Part 2) (WAEC)

Electromagnetic Field (Part 2)

Ver Resposta

Pergunta 43 Relatório

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

\(\alpha\)

\(\beta\)

\(\gamma\)

\(\beta\) and \(\gamma\)

none of them

Detalhes da Resposta

Read lesson note on Electric Field (WAEC)

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

Read lesson note on Electromagnetic Field (Part 2) (WAEC)

Electric Field

Magnetic Field (Part 1)

Electromagnetic Field (Part 2)

Ver Resposta

Pergunta 44 Relatório

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

Detalhes da Resposta

Read lesson note on Electric Field (WAEC)

Electric Field

Ver Resposta

Pergunta 45 Relatório

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

Detalhes da Resposta

Read lesson note on Pressure (JAMB)

Pressure

Ver Resposta

Pergunta 46 Relatório

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

Detalhes da Resposta

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

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

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

Refraction Of Light Through At Plane And Curved

Magnetic Field (Part 1)

Properties Of Waves: Reflection, Refraction, Diffraction

Ver Resposta

Pergunta 47 Relatório

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

Detalhes da Resposta

Read lesson note on Position, Distance And Displacement (WAEC)

Read lesson note on Measurements And Units (JAMB)

Position, Distance And Displacement

Measurements And Units

Ver Resposta

Pergunta 48 Relatório