JAMB UTME - Physics - 1981 | Green Bridge CBT

Swali 1 Ripoti

Which type of radiation does not NOT originate within the nucleus?

alpha

beta

gamma

neutron

x-rays

Maelezo ya Majibu

Soma maelezo ya somo kwenye Electric Field (WAEC)

Electric Field

Tazama Jibu

Swali 2 Ripoti

When a ray of light passes from water to glass, it is

bent away from the normal

bent towards the normal

totally internally reflected

absorbed by the glass

broken into a pure spectrum

Maelezo ya Majibu

Tazama Jibu

Swali 3 Ripoti

Which of the following statements is CORRECT?

charges generated on glass rubbed with silk are called negative

charges in various media can be carried by protons detached from their atom

the magnitude of any charge is a multiple of the charge of an electron

the intensity of an electric field is a scalar quantity

if 500 joules of work are required to move a 2-coulomb charge between two points, the potential difference between the two point is 100V

Maelezo ya Majibu

Soma maelezo ya somo kwenye Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Properties Of Waves: Reflection, Refraction, Diffraction

Tazama Jibu

Swali 4 Ripoti

The latent heat of fusion of a substance is the heat required to

raise the temperature of unit mass of the substance by 1 ^oC

maintain unit mass of the substance at constant temperature

change unit mass of substance from solid to liquid at constant temperature

change unit mass of liquid to vapour at constant temperature

raise the temperature of unit mass by 100^oC

Maelezo ya Majibu

Soma maelezo ya somo kwenye Quantity Of Heat (JAMB)

Quantity Of Heat

Tazama Jibu

Swali 5 Ripoti

The driver in a motor car, of which the total mass is 800kg and which is traveling at 20ms^-1, suddenly observes a stationary dog in his path 50m ahead. If the car brakes can exert a force of 2000N, what will most likely happen?

the car will be able to stop immediately the driver notices the dog

the car will stop 3pm after hitting the dog

the car will stop 20m in front of the dog

the driver will quickly reverse the car

the car will stop 5m beyound the dog

Maelezo ya Majibu

Soma maelezo ya somo kwenye Gravitational Field (JAMB)

Gravitational Field

Tazama Jibu

Swali 6 Ripoti

The following types of waves are transverse EXCEPT

light waves

radio waves

sound waves

surface waves on water

X-rays

Maelezo ya Majibu

Soma maelezo ya somo kwenye Production And Propagation Of Waves (WAEC)

Soma maelezo ya somo kwenye Sound Waves (WAEC)

Soma maelezo ya somo kwenye Properties Of Waves: Reflection, Refraction, Diffraction (WAEC)

Soma maelezo ya somo kwenye Types Of Waves (WAEC)

Production And Propagation Of Waves

Sound Waves

Properties Of Waves: Reflection, Refraction, Diffraction

Types Of Waves

Tazama Jibu

Swali 7 Ripoti

A body falls freely under gravity (g = 9.8ms^-2) from a height of 40m on to the top of a platform 0.8m above the ground. Its velocity on reaching the platform is

784ms^-1

80ms^-1

78.4ms^-1

39.2ms^-1

27.7ms^-1

Maelezo ya Majibu

Tazama Jibu

Swali 8 Ripoti

The principle of transmissibility of pressure in a fluid at rest in all directions is known as

Archimede's principle

Flotation Principle

Newton's lwa

Pascal's law

Boyle's law

Maelezo ya Majibu

Soma maelezo ya somo kwenye Pressure (JAMB)

Pressure

Tazama Jibu

Swali 9 Ripoti

The absolute refractive indices of glass and water are \(\frac{3}{2}\) and \(\frac{4}{3}\) respectively. The refractive index at the interface when a ray travels from water to glass is

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

\(\frac{8}{9}\)

\(\frac{9}{8}\)

\(\frac{17}{12}\)

Maelezo ya Majibu

Soma maelezo ya somo kwenye Refraction Of Light Through At Plane And Curved (JAMB)

Soma maelezo ya somo kwenye Optical Instruments (JAMB)

Refraction Of Light Through At Plane And Curved

Optical Instruments

Tazama Jibu

Swali 10 Ripoti

A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil.If the input voltage is 100 volts, the output voltage is

5 volts

10 volts

15 volts

20 volts

25 volts

Maelezo ya Majibu

Soma maelezo ya somo kwenye Capacitors (JAMB)

Capacitors

Tazama Jibu

Swali 11 Ripoti

A cell of e.m.f 2V and internal resistance 1\(\Omega\) supplies a current of 0.5 amps to a resistance whose value is

0.5\(\Omega\)

1\(\Omega\)

2\(\Omega\)

2.5\(\Omega\)

3\(\Omega\)

Maelezo ya Majibu

Soma maelezo ya somo kwenye Electric Cells (JAMB)

Electric Cells

Tazama Jibu

Swali 12 Ripoti

Two particles X and Y starting from rest cover the same distance. The acceleration of X is twice that of Y. the ratio of the time taken by X to that taken by Y is

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

\(\frac{1}{\sqrt2}\)

\(\sqrt 2\)

Maelezo ya Majibu

Soma maelezo ya somo kwenye Newton’s Laws Of Motion (WAEC)

Newton’s Laws Of Motion

Tazama Jibu

Swali 13 Ripoti

Alternating current can induce voltage because it has a

ripple value

varying magnetic field

weaker magnetic field than direct current

stonger magnetic field than direct current

high peak value

Maelezo ya Majibu

Soma maelezo ya somo kwenye Electric Field (WAEC)

Soma maelezo ya somo kwenye Electromagnetic Field (Part 2) (WAEC)

Electric Field

Electromagnetic Field (Part 2)

Tazama Jibu

Swali 14 Ripoti

If a source of sound is moving, a stationary listener will hear a sound of different frequency. This is called

Doppler effect

Resonance

Ultra sound

Diffraction of sound

Rarefaction

Maelezo ya Majibu

Soma maelezo ya somo kwenye Sound Waves (WAEC)

Sound Waves

Tazama Jibu

Swali 15 Ripoti

The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths of the mercury thread when the length is 12cm, the temperature is

32^oC

48^oC

56^oC

65^oC

75^oC

Maelezo ya Majibu

Soma maelezo ya somo kwenye Measurements And Units (JAMB)

Measurements And Units

Tazama Jibu

Swali 16 Ripoti

A vapour is said to be saturated when

moer molecules return to the liquid than leave it

a dynamic equilibrium exists between the liquid molecules and the vapour molecules at a given temperature

the vapour pressure is atmospheric

the temperature of the vapour varies

all molecules are moving with the same speed

Maelezo ya Majibu

Soma maelezo ya somo kwenye Vapours (JAMB)

Vapours

Tazama Jibu

Swali 17 Ripoti

Which of the following is NOT directly associated with direct current (DC)?

A dry cell

a moving coil galvanometer

a transformer

a lead- acid accumulator

a commutator

Maelezo ya Majibu

Soma maelezo ya somo kwenye Current Electricity (JAMB)

Soma maelezo ya somo kwenye Electric Cells (JAMB)

Soma maelezo ya somo kwenye Magnets And Magnetic Fields (JAMB)

Current Electricity

Electric Cells

Magnets And Magnetic Fields

Tazama Jibu

Swali 18 Ripoti

Which type of radiation does not NOT originate within the nucleus?

alpha

beta

gamma

neutron

x-rays

Maelezo ya Majibu

Soma maelezo ya somo kwenye Electromagnetic Field (Part 2) (WAEC)

Electromagnetic Field (Part 2)

Tazama Jibu

Swali 19 Ripoti

When fixed mass of an ideal gas expands at constant temperature, which property of the gas molecule increases?

average number per unit volume

average kinetic energy

average speed

average seperation

average number of collisions per unit time

Maelezo ya Majibu

Soma maelezo ya somo kwenye Gas Laws (JAMB)

Gas Laws

Tazama Jibu

Swali 20 Ripoti

A body of mass 6kg rests on an inclined plane. The normal reaction is R and the limiting frictional force is F as shown in the image above. if F = 30N, and g = 10ms² then the angle of inclination \( \theta \) is

\( 15^{\circ} \)

\( 30^{\circ} \)

\( 45^{\circ} \)

\( 60^{\circ} \)

\( 75^{\circ} \)

Maelezo ya Majibu

Tazama Jibu

Swali 21 Ripoti

The effect of closing the key K in the circuit shown above would be to

increase the current by 0.6A

reduce the current by 0.6A

increase the current by 0.4A

keep the current unchanged

Maelezo ya Majibu

Soma maelezo ya somo kwenye Capacitors (JAMB)

Soma maelezo ya somo kwenye Current Electricity (JAMB)

Soma maelezo ya somo kwenye Simple A.C Circuits (JAMB)

Capacitors

Current Electricity

Simple A.C Circuits

Tazama Jibu

Swali 22 Ripoti

The resistance of an open series circuit is

zero

half the normal resistance of the circuit

double the normal resistance of the circuit

one

infinite

Maelezo ya Majibu

Tazama Jibu

Swali 23 Ripoti

The extension in a spring when 5g wt was hung from it was 0.56cm. If Hooke's law is obeyed, What is the extension caused by a load of 20g wt?

1.12m

2.14cm

2.52cm

2.80cm

2.24cm

Maelezo ya Majibu

Soma maelezo ya somo kwenye Elasticity (JAMB)

Elasticity

Tazama Jibu

Swali 24 Ripoti

The quantity (timbre) of sound depends on

amplitude

frequency

harmonics

velocity

wavelength

Maelezo ya Majibu

Soma maelezo ya somo kwenye Characteristics Of Sound Waves (JAMB)

Characteristics Of Sound Waves

Tazama Jibu

Swali 25 Ripoti

Change of state is accompanied by change of

temperature

volume

heat content

temperatureb and volume

volume and heat content

Maelezo ya Majibu

Soma maelezo ya somo kwenye Change Of State (JAMB)

Change Of State

Tazama Jibu

Swali 26 Ripoti

in a light experiment with a convex lens a student plotted a graph as shown above of the reciprocal of object distance (1)/u against the reciprocal of image distance (1)/v . the focal length of the lens is given as

slope of line PQ

Reciprocal of either OP or OQ

Length OP or OQ

area under the graph E ratio OP/OQ

Maelezo ya Majibu

Tazama Jibu

Swali 27 Ripoti

Which of the following is NOT an effect that can be produced by an electric current?

heat

light

sound

motion

none of the above

Maelezo ya Majibu

Soma maelezo ya somo kwenye Current Electricity (JAMB)

Soma maelezo ya somo kwenye Simple A.C. Circuits (WAEC)

Current Electricity

Simple A.C. Circuits

Tazama Jibu

Swali 28 Ripoti

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

the temperature rises and the ice expand

the temperature remains constant and the volume of the ice decreases

the ice gives out heat as it melts and the temperature decreases

the mass remains constant and the temperature increases

the temperature decreases because some heat is lost

Maelezo ya Majibu

Soma maelezo ya somo kwenye Heat Energy (WAEC)

Soma maelezo ya somo kwenye Change Of State (JAMB)

Soma maelezo ya somo kwenye Temperature And Its Measurement (JAMB)

Heat Energy

Change Of State

Temperature And Its Measurement

Tazama Jibu

Swali 29 Ripoti

Which of the following statements is applicable to a real image formed by a concave mirror? i. it can be observed on a screen ii. it is always inverted and in front of the mirror iii. it only seams to exist IV. it is formed by the actual converging of rays of light

i, ii and iii

i, ii and iv only

i and ii only

all four statements

Maelezo ya Majibu

Soma maelezo ya somo kwenye Reflection Of Light At Plane And Curved Surfaces (JAMB)

Reflection Of Light At Plane And Curved Surfaces

Tazama Jibu

Swali 30 Ripoti

An object placed on the principle axis of a convex lens of focal length 10m produces a real image of double magnification. The image distance from the lens is

30cm

25cm

20cm

15cm

10cm

Maelezo ya Majibu

Soma maelezo ya somo kwenye Structure Of The Atom (Nigeria Only) (WAEC)

Soma maelezo ya somo kwenye Electrostatics (JAMB)

Structure Of The Atom (Nigeria Only)

Electrostatics

Tazama Jibu

Swali 31 Ripoti

All of the following frequencies are overtones of 320 Hz EXCEPT

960Hz

640Hz

520Hz

1280Hz

1600Hz

Maelezo ya Majibu

Soma maelezo ya somo kwenye Electromagnetic Waves: Types Of Radiation In Elect (WAEC)

Electromagnetic Waves: Types Of Radiation In Elect

Tazama Jibu

Swali 32 Ripoti

A closed coil of wire is placed near a magnet. The magnet lies along the axis of the coil. Under which of the following conditions would there be no current in the coil?

When the coil is moved toward the stationary magnet

When the coil is moved away from the stationary magnet

when the coil is held stationary but the magnet is moved towards the coil

when both the coil and the magnet are held stationary

when the coil is held stationary but the magnet is moved away from the cell

Maelezo ya Majibu

Soma maelezo ya somo kwenye Force On A Current-carrying Conductor In A Magneti (JAMB)

Force On A Current-carrying Conductor In A Magneti

Tazama Jibu

Swali 33 Ripoti

Which of the following does NOT describe the image formed by a plane mirror?

erect

laterally inverted

same distance from mirror as object

magnified

virtual

Maelezo ya Majibu

Soma maelezo ya somo kwenye Electrostatics (JAMB)

Electrostatics

Tazama Jibu

Swali 34 Ripoti

a balloon inflated with helium gas at ground level is released. As it rises through a constant temperature atmosphere.

its pressuren reduces but volume remains constant

te product of pressure and volume remains constant

both pressure and volume increases

its pressure remains constant but the volume decreases

both pressure and volume remains constant

Maelezo ya Majibu

Soma maelezo ya somo kwenye Gas Laws (JAMB)

Soma maelezo ya somo kwenye Pressure (JAMB)

Gas Laws

Pressure

Tazama Jibu

Swali 35 Ripoti

The resistance of a 240V, 60 watt electric filament bulb is

0.25\(\Omega\)

480\(\Omega\)

60\(\Omega\)

240\(\Omega\)

960\(\Omega\)

Maelezo ya Majibu

Soma maelezo ya somo kwenye Current Electricity (JAMB)

Current Electricity

Tazama Jibu

Swali 36 Ripoti

Which of the following elements are real magnetic materials?

Iron, steel and nickel

copper, steel and iron

lead, iron and brass

glass, lead and steel

stone, air and iron

Maelezo ya Majibu

Soma maelezo ya somo kwenye Magnets And Magnetic Fields (JAMB)

Magnets And Magnetic Fields

Tazama Jibu

Swali 37 Ripoti

An aircraft travelled from calabar to kano as follows: it flew first to ilorin convering a distance of 300km, 30^o west of North, and then flew 400km, 60^o East of North to kano. What is the resultant displacement?

567km

410km

594km

500km

600km

Maelezo ya Majibu

Soma maelezo ya somo kwenye Motion (JAMB)

Motion

Tazama Jibu

Swali 38 Ripoti

An example of a scalar quantity is

velocity

weight

electric charge

acceleration due to gravity

momentum

Maelezo ya Majibu

Soma maelezo ya somo kwenye Scalars And Vectors (JAMB)

Soma maelezo ya somo kwenye Position, Distance And Displacement (WAEC)

Scalars And Vectors

Position, Distance And Displacement

Tazama Jibu

Swali 39 Ripoti

The mass of a proton is approximately equal to that of

an \(\alpha\)-particle

a \(\beta\)-particle

\(\gamma\)-ray

an electron

a neutron

Maelezo ya Majibu

Tazama Jibu

Swali 40 Ripoti

The wave motion above has a frequency

0.1Hz

0.2Hz

5Hz

10Hz

100Hz

Maelezo ya Majibu

Soma maelezo ya somo kwenye Types Of Waves (WAEC)

Types Of Waves

Tazama Jibu

Swali 41 Ripoti

The relationship between the period T and the length T of a smile pendulum is T = 2\( \pi \) \( ( \frac{I}{g}) ^{ \frac{1}{2} } \). From experiment data of T and I, one can obtain the following graphs, i. T vs.I ii. T vs I² iii. T² vs. I iv. T vs \( \sqrt{I} \) v. logT vs logI. Which of the following graphs, are linear?

all

only i and ii

only iii and iv

iii,iv and v

none of them

Maelezo ya Majibu

Soma maelezo ya somo kwenye Simple Harmonic Motion (WAEC)

Soma maelezo ya somo kwenye Simple A.C Circuits (JAMB)

Soma maelezo ya somo kwenye Propagation Of Sound Waves (JAMB)

Simple Harmonic Motion

Simple A.C Circuits

Propagation Of Sound Waves