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CSEC Physics Paper 1 May/June 2023 - Free CXC Past Paper with Answers
Free CXC Physics Paper 1 May/June 2023 past paper from 2023. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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Which of the following diagrams correctly represents the direction of the magnetic field lines around a straight conductor carrying a current upwards?
Diagram A
Diagram B
Diagram C
Diagram D
A coil of wire is placed in a magnetic field. Which of the following actions will induce an electromotive force (e.m.f.) in the coil?
Rotating the coil about an axis perpendicular to the magnetic field
Keeping the coil stationary in the magnetic field
Moving the coil parallel to the magnetic field
Keeping the coil stationary and increasing the magnetic field strength
A transformer consists of a primary coil and a secondary coil wound on a soft iron core. Which of the following statements is correct?
The primary and secondary coils must be wound on separate iron cores.
The soft iron core is used to increase the magnetic flux linkage between the coils.
The transformer will work with direct current (d.c.) but not with alternating current (a.c.).
The voltage across the secondary coil is always greater than the voltage across the primary coil.
A step-down transformer is used to reduce the voltage from the mains supply to a lower voltage for domestic use. Which of the following is correct?
The number of turns on the primary coil is less than the number of turns on the secondary coil.
The number of turns on the primary coil is greater than the number of turns on the secondary coil.
The primary coil is connected to the low voltage side and the secondary coil to the high voltage side.
The current in the primary coil is less than the current in the secondary coil.
Which of the following is the unit of magnetic flux density?
Weber (Wb)
Tesla (T)
Ampere (A)
Henry (H)
A coil of 100 turns has a magnetic flux of Wb passing through it. If the flux is reversed in s, what is the magnitude of the average e.m.f. induced in the coil?
V
V
V
V
Which of the following statements about electromagnetic waves is correct?
They are transverse waves.
They require a medium for propagation.
They travel at different speeds in a vacuum.
They are longitudinal waves.
Which of the following is the correct order of the electromagnetic spectrum from lowest frequency to highest frequency?
Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays
Gamma rays, X-rays, Ultraviolet, Visible light, Infrared, Microwaves, Radio waves
Radio waves, Visible light, Infrared, Microwaves, Ultraviolet, X-rays, Gamma rays
Gamma rays, Visible light, Radio waves, Microwaves, Infrared, Ultraviolet, X-rays
The kinetic energy of a body of mass, , and velocity, , is given by
$mv$
A body initially moving at a constant speed is brought to rest at a uniform rate. Which of the following speed/time graphs indicates the motion of the body?
Speed vs Time graph
Speed vs Time graph
Speed vs Time graph
Speed vs Time graph
A 4 kg mass is travelling with a constant speed of 5 m s⁻¹. It is brought to rest in 2 seconds. The average force acting on the mass to bring it to rest is
1.6 N
2.5 N
10.0 N
40.0 N
An ice cube sinks in Liquid A but floats in Liquid B. Which of the following statements is true of Liquid A and Liquid B?
The upthrust is less in Liquid A than in Liquid B.
The upthrust is greater in Liquid A than in Liquid B.
The weight of the ice cube is less in Liquid A than in Liquid B.
The weight of the ice cube is greater in Liquid A than in Liquid B.
A bus with luggage loaded on top is more likely to tip over when rounding a corner than the same bus without the luggage. The reason for this is that the luggage
increases the weight of the bus
raises the centre of gravity of the bus
lowers the centre of gravity of the bus
increases the momentum of the bus
Which of the following statements are true about the spring above?
I. The elastic limit of the spring was exceeded. II. The spring obeyed Hooke's law over its entire extension. III. The force per unit extension in the elastic region was 7.5 N cm⁻¹
I and II only
I and III only
II and III only
I, II and III
Power is a measure of the
work done
total change of energy
rate of change of energy
rate of change of momentum
Two forces of 8 N and 10 N CANNOT give a resultant of
1 N
2 N
9 N
18 N
X, Y and Z are three billiard balls of equal mass whose centres lie in a straight line. Y and Z are touching one another. X, travelling with a velocity of 20 m s⁻¹, impinges on Y. Assuming that the spheres are perfectly elastic, the resultant motion after impact will be that
X, Y and Z remain stationary
X and Y remain stationary while Z moves on with a velocity of 20 m s⁻¹
X, Y and Z all move on together, each with a velocity of 10 m s⁻¹
X remains stationary while Y and Z move on together each with a velocity of 10 m s⁻¹
What is the gain in the gravitational potential energy of a body of weight 200 N, as it rises from a height of 30 m to a height of 35 m above the earth's surface?
40 J
100 J
1000 J
2000 J
Which of the following quantities remains unchanged with an increase in tempera- ture?
Mass
Density
Volume
Relative density
The specific heat capacity of a substance is defined as the amount of thermal energy required to
raise the temperature of the substance by 1 K
convert unit mass of the substance from liquid to vapour
convert unit mass of the substance from solid to liquid
raise the temperature of unit mass of the substance by 1K
The specific latent heat of vaporization of water is . When 0.01 kg of water is converted into steam, it
absorbs
gives out
absorbs
gives out
A gas occupies 2 m³ at 27 °C at a pressure of 1 atmosphere. At a pressure of 2 atmospheres it occupies a volume of 1 m³. What is its temperature at this new volume and pressure?
54.0 °C
27.0 °C
6.75 °C
-198 °C
Which of the following methods is the MOST suitable means of heating a brass bob in order to determine its specific heat capacity by the method of mixtures?
Subjecting it to an open flame for ten minutes
Subjecting it to an infrared beam for ten minutes
Placing it in a boiling water-bath for ten minutes
Placing it in contact with an electrical heater for ten minutes
According to the kinetic theory, when a gas in a closed container is heated the pressure rises because
there are more molecules hitting the walls of the container
the molecules move faster and hit each other harder and more often
the molecules expand and push harder on the walls of the container
the molecules move faster and hit the walls of the container harder and more often
Molten naphthalene at 100 °C is allowed to cool down to room temperature. If naphthalene has a melting point of 80 °C, which of the following graphs BEST represents the cooling curve?
0/°C 100 80 t/min
0/°C 100 80 t/min
0/°C 100 80 t/min
0/°C 100 80 t/min
In which of the following is conduction the MAIN method of energy transfer?
Food heated in a microwave oven
Energy transferred from the sun to earth
Food being cooked on a barbecue
Food being cooked in a pot on an electric stove
Which of the following are reasons why a hot liquid, placed in a double-walled vacuum flask, retains its heat for a long time? I. Silver inner walls reduce the loss of heat by radiation. II. The silvered outer wall helps to absorb heat from the surroundings. III. Evacuated space between the double walls reduces the loss of heat by conduction.
I and II only
I and III only
II and III only
I, II and III
A person coming out of the sea would feel cool because
the sea is cold
heat is lost by radiation
seawater evaporates from the skin
convection of thermal energy occurs into the air
The kinetic theory of matter suggests that the molecules of a gas are
closely packed and vibrating
closely packed and moving over each other
far apart and vibrating about a fixed point
far apart and moving at random
Which of the following statements provides the reason for this occurrence?
Water is a poor conductor of heat.
Water is a good conductor of heat.
Gauze is a poor conductor of heat.
Glass is a good conductor of heat.
From the information above, the frequency is
Hz
10 Hz
20 Hz
unknown
The sharp edges of shadows suggest that light
travels in straight lines
travels very quickly
is a form of energy
has a wave nature
An echo is quieter than the original sound that produced it. This shows that, compared to the original sound, the echo has a
shorter wavelength
smaller amplitude
lower frequency
slower speed
At some points along XY no sound is heard because
the sound waves are diffracted
interference of the sound waves takes place
the sound waves are refracted away from those points
the sound waves are reflected back to the same source
A ray of light leaving air enters glass of refractive index 1.6. The angle of refraction is 27°. What is the sine of the angle of incidence?
1.6 + sin 27°
1.6 sin 27°
Which of the following waves travel only longitudinally?
I. Sound waves II. Radio waves III. Water waves
I only
II only
II and III only
I, II and III
Which of the following can produce a diminished virtual image of a real object?
A converging lens
A diverging lens
A plane mirror
A glass block
Total internal reflection in glass occurs when
all the light is transmitted
the angle of incidence is 90
the critical angle is exceeded
the incident ray is perpendicular to the glass boundary
A ray of light in air strikes a glass block at an angle of incidence of 0°. On entering the glass block, the light will be
undeviated
totally reflected
refracted at 90° to the normal
refracted at an unknown angle
The position of an image formed by a plane mirror depends on the
distance of the observer from the mirror
distance of the object from the mirror
angle at which the image is viewed
angle at which the object is viewed
Which of the following expressions would represent the formula(e) for linear magnification?
I. II. III.
I only
II only
I and III only
II and III only
Item 42 refers to the following graph showing the variations of alternating current with time. Current I₁ t₁ Time
The value of the current, I₁, at time, t₁, is called the
root mean square value
sinusoidal value
average value
peak value
When a polythene rod is rubbed with a cloth, it becomes
positively charged by gaining protons
negatively charged by gaining electrons
positively charged by gaining electrons
negatively charged by losing protons
Which of the following diagrams shows the magnetic field formed between a bar magnet and a piece of iron?
N S Iron
N S Iron
N S Iron
N S Iron
Item 45 refers to the following circuit where the ammeter reads 0.4 A and the voltmeter reads 0.6 V. A R V
What is the resistance of R?
15 Ω
1.5 Ω
0.67 Ω
0.24 Ω
A conductor, rotating in a uniform magnetic field, induces maximum instantaneous current when the conductor cuts the magnetic field lines at
30°
45°
90°
180°
Which of the following relationships is correct for the combined resistance, , of resistors , , and connected in parallel?
A voltmeter has a very high resistance so that it can be placed in
parallel with a component and not affect the circuit
series with a component and not affect the circuit
parallel with a component and the voltmeter does not heat up
series with a component and the voltmeter does not heat up
Which of the following graphs illustrates an alternating current?
Current / Time graph showing half-wave rectified AC
Current / Time graph showing full-wave rectified AC
Current / Time graph showing a sinusoidal AC waveform
Current / Time graph showing a square wave AC waveform
Which of the following circuit arrangements is BEST suited for measuring a lamp's voltage?
Diagram A
Diagram B
Diagram C
Diagram D
Which of the following circuit diagrams BEST represents a series arrangement?
Diagram A
Diagram B
Diagram C
Diagram D
What is the output at C and D when an input of 0 0 is made at A and B?
0 / 0
1 / 1
0 / 1
1 / 0
Using the information given in the circuit diagram, which pair of values of I, and I, is correct?
1 / 5
2 / 4
3 / 3
4 / 2
Which of the following materials is MOST suitable for the core of an electromagnet?
Steel
Copper
Carbon
Soft iron
According to the Rutherford-Bohr model of a neutral, stable atom, if n = number of neutrons, p = number of protons, and e = number of electrons in the atom, then for all elements
Which of the following symbols would be possible for an isotope of a nuclide represented by ?
Which of the following CANNOT be deflected by a magnetic field?
Alpha particles
Beta particles
Gamma rays
Electrons
Which of the following pairs of statements is true for BOTH iron and steel?
Easily magnetized / Does not retain its magnetism
Easily magnetized / Retains its magnetism well
Not easily magnetized / Retains its magnetism well
Not easily magnetized / Does not retain its magnetism
Which of the following scientists discovered radium?
Marie Curie
Isaac Newton
J.J. Thompson
Albert Einstein
Which of the following equations is correct?
${}^{226}{88}\text{Ra} → {}^{222}{86}\text{Rn} + \beta\text{-particle}
${}^{14}{6}\text{C} → {}^{15}{7}\text{N} + \beta\text{-particle}
${}^{226}{88}\text{Ra} → {}^{222}{86}\text{Rn} + \alpha\text{-particle}
${}^{14}{6}\text{C} → {}^{15}{7}\text{N} + \alpha\text{-particle}