PHYSICS ORAL TEST MODULE
Fizik merupakan satu subjek yang memerlukan kefahaman yang mendalam. Sebelum dapat memahami konsep dalam fizik para pelajar perlu mempunyai pengetahuan asas yang komprehensif tentang konsep–konsep fizik. Jadi untuk mempastikan setiap pelajar menguasai konsep asas fizik ini maka ‘Oral Test’ diperkenalkan. Para guru akan terus dapat mengenalpasti pelajar-pelajar yang masih lagi lemah dan bermasalah dalam subjek Fizik.
1. Untuk mempastikan para pelajar mempunyai pengetahuan asas dalam fizik.
2. Untuk mempastikan para pelajar belajar dan menguasai aspek pengetahuan dalam
3. Untuk mengetahui sejauh mana pengetahuan pelajar dalam subjek fizik.
4. Untuk mengetahui tajuk manakah yang menjadi masalah kepada para pelajar.
Pelajar-pelajar yang diletakkan dalam kelas dulang emas (lemah)
1. Pemilihan Pelajar
Sebelum program ini dimulakan para pelajar kelas dulang emas dipilih terlebih
2. Persediaan awal
Para pelajar yang terlibat akan diberi taklimat dan tarikh Oral Test yang akan
3. Pelaksanaan Ujian
Sejurus sebelum para pelajar menduduki ujian
Mereka akan diminta memilih booklet soalan Oral test terlebih dahulu.
Guru kemudiannya akan menggunakan booklet soalan tersebut untuk menyoal para
Markah akan diberikan sebaik sahaja pelajar selesai menjalani ujian tersebut.
4. Peperiksaan Ulangan
Mana-mana pelajar yang tidak mencapai tahap akan diminta menduduki semula ujian
tersebut lain kali.
UNDERSTANDING PHYSICS, BASE QUANTITIES , DERIVED QUANTITIES, SCALAR AND VECTOR QUANTITIES.
1. What is physical quantities?
2. What is base quantities?
3. Give 5 examples of base quantities.
4. What is derived quantities?
5. Give the symbol for electric current & its unit.
6. Give the unit for Volume.
7. Arrange the prefixes nano , micro, milli, centi, deci,kilo,mega and giga
in ascending order.
8. 1 MW = ………W
9. What is scalar quantities?
10.What is vector quantities?
1. What is precision?
2. What is accuracy?
3. What is sensitivity?
4. What is random error?
5. Give an example of random error.
6. What is systematic error.
7. Give an example of systematic error.
8. Name the scales in vernier calipers.
9. What is the use of rachet in micrometer screw gauge?
10.Which instrument is the most suitable to measure the internal and external
diameter of a beaker?
ANALYSING SCIENTIFIC INVESTIGATION
1. What is inference?
2. Give an example of a hypothesis involving the length of pendulum and the
period of oscillation.
3. What is manipulated variables?
4. What is responding variable?
5. Name another form of variable beside M.V and R.V.
6. In a table where the M.V is placed?
7. In a graph, what axis represents M.V
8. How to determine the gradient of a straight line graph?
9. What is the relationship between M.V and R.V of a graph is the graph is a
straight line graph passing through origin.
10.List the process in a scientific investigation.
ANALYSING LINEAR MOTION
1. What is distance?
2. What is displacement ?
3. What is speed?
4. What is velocity?
5. What is acceleration?
6. What is deceleration?
7. What is the use of a ticker timer?
8. What is the time for one ticks on ticker tape?
9. Give 2 equation of linear motion.
10.What is the acceleration of object which moves with constant velocity?
ANALYSING MOTION GRAPHS
1. Name two types of motion graph that can be draw.
2. In a s-t graph, what physical quantities that represents the velocity of an
3. In an s-t graph, if the gradient is constant, what is the motion of the
4. In an s-t graph, if the gradient is zero, what is the motion of the object?
5. In an s-t graph, if the gradient is increasing, what is the motion of the
6. In a v-t graph, what is the physical quantities that represent the
acceleration of an object.
7. What represents the area under the velocity-time graph?
8. In v-t graph, if the gradient is constant,what is the motion of the object?
9. In v-t graph, if the gradient is zero, what is the motion of the object?
10.In v-t graph, if the gradient is increasing, what is the motion of the
ANALYSING INERTIA AND MOMENTUM
1. What is inertia?
2. What is the relationship between mass and inertia?
3. What is Newton’s First Law Of Motion?
4. What is Momentum?
5. State the Principle Of Conservation Of Momentum.
6. State two type of collision.
7 State the relationship between accceleration and force.
8. State the relationship between mass and acceleration.
9. What is the formula to calculate the resultant force,F.
10.Why a parachutists bend his knee when lands on the ground?
UNDERSTANDING THE EFFECTS OF FORCE, IMPULSE AND IMPULSIVE FORCE, FORCES IN EQUILIBRIUM
1. What is the force?
2. What is frictional force?
3. State the formula to calculate impulsive force.
4. What is impulsive force?
5. What is weight?
6. What is the value of acceleration due to gravity ?
7. State the formula to calculate weight.
8. What happen to an object if the forces acting on it is in equilibrium?
9. State the differences between mass and weight.
10.What is meant by resolution of forces.
UNDERSTANDING WORK, ENERGY,POWER AND EFFICIENCY
1. What is meant by work?
2. State the unit for elastic potential energy.
3. What is meant by gravitaional energy?
4. State the formula of Kinetic Energy.
5. What is meant by power?
6. What is the unit of power.
7. State the Newton’s Third Law Of Motion.
8. State The Principle Of Conservation Of Energy?
9. State the changes os energy of an object that falls from a building.
10.What is the energy possessed by a spring when it is compressed or stretched?
1. Name two forces that acts between two particles in solid.
2. What is elasticity.
3. What is Hooke’s Law ?
4. What is spring constant, k ?
5. What is the unit of k?
6. State 5 factors that influences the spring constant, k .
7. What happen to value of k is the length of a spring is longer?
8. Which spring is more tougher, a spring with bigger diameter of coil or the
spring with smaller diameter of coil?
9. Between Copper springs and steel spring, which one can extends more if same
load is attached?
10.Which arrangement of spring gives more extension, the springs arrange in
series or in parallel?
UNDERSTANDING PRESSURE AND PRESSURE IN LIQUID
1. What is density?
2. State the S.I unit of density.
3. State in ascending order the density of solid,liquid and gas.
4. What is pressure?
5. What is the unit of pressure.
6. What is the relationship between surface area and pressure?
7. Why elephant did not sink in muddy area?
8. State the formula to calculate pressure in liquid.
9. Why the basement of a damp is built wider than the upper part?
10.Why the ear of a diver feels painful as he dive deeper in a river?
UNDERSTANDING GAS PRESSURE AND ATMOSPHERIC PRESSURE
1. What is atmospheric pressure?
2. Name an instrument to measure the atmospheric pressure.
3. What is the value of atmospheric pressure.
4. What happen to the atmospheric pressure when the altitude increases.
5. Name two application of atmospheric pressure.
6. What is gas pressure?
7. Name an instrument to measure the gas pressure.
8. What is Archimedes Principle?
9. State the Law Of Floatation?
10.Give 3 application of Archimedes Principle.
PASCAL PRINCIPLE AND BERNOULLI PRINCIPLE
1. State the Pascal Principle.
2. State 2 application of Pascal Principle in everyday life.
3. What Principle is used in hydraulic jack?
4. Give a formula used in hydraulic system.
5. Why oil is used as the liquid in hydraulic system.
6. State the Bernoulli’s Principle.
7. State 3 applications of Bernoulli’s Principle.
8. Give the name of shape for the wing of an aeroplane.
9. What happen when 2 racing cars move parallel and close to each other in a
10.What principle is used in insectiside sprayer?
1. What is temperature?
2. What is heat?
3. What are the differences between temperature and heat?
4. What is thermal equilibrium?
5. Give 3 applications of Thermal Equilibrium.
6. What is themometric properties?
7. Give two example of thermometric properties.
8. What is the thermometric properties for liquid in glass thermometer?
9. What are the temperatures to be considered to calibrate a thermometer?
10.Give another 2 types of thermometer
SPECIFIC HEAT CAPACITY
1. What is heat capacity?
2. What is the unit of heat capacity?
3. What is specific heat capacity?
4. What is the unit of specific heat capacity?
5. What is the formula to calculate specific heat capacity?
6. Arrange in ascending order the specific heat capacity of solid,liquid and
7. What is the relationship between specific heat capacity and the time for an
object to become hot.
8. Explain the uses of specific heat capacity in sea breeze.
9. Explain the uses of specific heat capacity in cooking utensils.
10.Explain the uses of specific heat capacity in car cooling system.
SPECIFIC LATENT HEAT
1. What is latent heat ?
2. What is the specific latent heat of fusion?
3. What is specific latent heat of vaporisation?
4. What is the unit of specific latent heat?
5. What is the formula to calculate specific latent heat ?
6. In an experiment to determine the specific latent heat of fusion of ice, why
a control experiment is needed?
7. Why the value of specific latent heat obtained in the experiment is always
larger the the standard value?
8. Draw a heating curve graph when a solid is heated uniformly and undergoes a
change in state from solid to liquid.
9. Draw a cooling curve graph for a substance in gaseous state cools downs
and undergoes a change in state from gas to liquid to solid.
10.Find the heat needed to change the state of matter of 200g of ice at 0°C to
water at 0°C?
(Specific latent heat of fusion of ice = 3.36 x105 Jkg-1)
1. What is Boyle’s Law?
2. State a formula that can be derived from Boyle’s Law.
3. What is the shape of graph pressure versus Volume?
4. What is Charles’ Law?
5. State a formula that can be derived from Charles’ Law.
6. What is absolute zero?
7. What is the value of 30°C in Kelvin?
8. What is Pressure Law?
9. State a formula that can be derived from Pressure Law.
10.What is the shape of graph Pressure,P versus temperature,T (T in celcius).
REFLECTION OF LIGHT
1. Give one characteristic of light.
2. What happen to the ray of light when it hit a plane mirror?
3. State the law of reflection.
4. What is angle of incidence, i ?
5. What is angle of reflection,r ?
6. What are the characteristics of image formed in plane mirror?
7. What can you say about the distance between object and the mirror and the
distance between the image and the mirror?
8. Write down the image of word PHYSICS formed in plane mirror.
9. A light ray is incidently perpendicularly on a plane mirror. If the plane
mirror is rotated 15°, what is the angle between the incident ray and the
10.A boy stands 3m in front of a plane mirror. He walks 2m towards the mirror,
1. Name two types of curved mirror.
2. What is meant by centre of curvature,C?
3. What is meant by pole,P ?
4. What is meant by principal axis?
5. What is meant by principal focus, F?
6. What is meant by focal length,f?
7. What is meant by virtual image?
8. What are the characteristics of image formed by convex mirror?
9. What are the characteristics of image formed by concave mirror if the object
is at C (2F)?
10.Give one application of convex mirror.
1. What is meant by refraction?
2. What is the angle of refraction,r?
3. What happen to the refracted ray if the incidence ray is from less dense
medium to denser medium?
4. What is refractive index,η ?
5. What happen to the refractive index of a substance if the density increases?
6. State the law of refraction.
7. What is real depth?
8. What is apparent depth?
9. State the refractive index, η in term of real depth and apparent depth.
10.State the refractive index, η in term of speed of light in vacuum and speed
of light in the medium.
TOTAL INTERNAL REFLECTION
1. What happen to the ray of light when it passs from glass to air?
2. When the ray of light is from glass to air, what what happen to the angle of
refraction if the angle of refraction is increase?
3. What is critical angle?
4. What is total internal reflection?
5. State 2 conditions for total internal reflection to occur.
6. Give a formula involving the refractive index and critical angle.
7. What is fibre optic?
8. Why fibre optics cable are better than the the copper cables.
9. How many total internal reflection occur in a prismatic telescope.
10.State one phenomena involving Total Internal Reflecton.
1. Name two types of lenses.
2. What is meant by optical centre,C of a lens?
3. What is meant by principal axis?
4. What is meant by principal focus, F?
5. What is meant by focal length,f?
6. What are the characteristics of image formed by convex lens when the object
is between F and 2F?
7. What are the characteristics of image formed by concave lens?
8. Give a formula to determine the magnification of image formed using convex
9. What is the Power of lens?
10.Give the the lens equation.
1. Where must the object be placed to make a convex lens acts as a magnifying glass?
2. What is the use of e telescope?
3. Name the lenses used in telescope.
4. What are the characteristics of the first image formed in Telescope?
5. What are the characteristics of the final image formed in Telescope?
6. Give the formula to determine the magnification of a telescope.
7. At normal adjustment what is the distance between the two lenses in
8. What is the use of a compound microscope?
9. Which lens has the higher focal length in compound microscope?
10.What are the characteristics of the final image formed in compound
1. What is an oscillating system?
2. What is meant by one complete oscillation?
3. What is meant by amplitude?
4. What is meant by period?
5. What is frequency?
6. Name two graphs that can be drawn form an oscillating system.
7. What is damping?
8. What is natural frequency?
9. What is Resonance?
10.Give one disadvantage of resonance.
1. What is transverse wave?
2. What is longitudinal wave?
3. What is mechanical wave?
4. What is electromagnetic wave?
5. Give a formula to calculate the speed of wave.
6. What is trough?
7. What is Crest?
8. What is wavelength?
9. What is wavefront?
10.What is relationship between the amplitude of wave and the energy carried by
ANALYSING REFLECTION OF WAVES
1. What is a ripple tank?
2. Why dark and bright patterns formed on the screen under the ripple tank?
3. What is used to observe wave pattern on the screen under the ripple tank?
4. What happens to the direction of the wave after being reflected?
5. What happens to the wavelength of the wave after being reflected?
6 What happens to the frequency of the wave after being reflected?
7. What happens to the speed of the wave after being reflected?
8. What can you say about the angle of incidence,i and the angle of relection,r
in reflection of sound waves?
9. Why a softboard is used in an experiment of reflection of sound waves?
10.What is the pattern of reflected waves when a plane wave hits a concave
ANALYSING REFRACTION OF WAVES
1. What is refraction of water waves?
2. What happens to the direction of the wave when it propagates from deeper area to
a shallow area ?
3. What happens to the wavelength of the wave when it propagates from deeper area to
a shallow area ?
4. What happens to the frequency of the wave after being refracted?
5. What happens to the speed of the wave after being refracted?
6. What happens to the direction of refracted water waves when it propagates from
deeper area and passes on to a convex shape perspex plate?
7. What happens to the direction of refracted water waves when it propagates from
deeper area and passes on to a concave shape perspex plate?
8. In an experiment of refraction of sound waves, why carbon dioxide gas is used in
9. What happen to the waves from the sea as it moves to the bay at the sea side?
10.What happen to the waves from the sea as it moves to the cape at the sea side?
ANALYSING DIFFRACTION OF WAVES
1. What is diffraction of waves?
2. What happen to the wavelength of diffracted waves compare to the wavelength of
3. What happen to the frequency of diffracted waves compare to the frequency of
4. What happen to the speed of diffracted waves compare to the speed of incident
5. What happen to the amplitude of diffracted waves compare to the amplitude of
6. Compare the diffraction pattern between waves passing through small gap and
7. Suggest a way to make the waves calm and safer at the harbour.
8. Explain why a student at the other side of a building can still hear sound from
the corner of a building.
9. Draw the fringes formed when light from a laser pointer passess through a single
10.Draw the fringes formed when light from a laser pointer passess through a small
ANALYSING INTERFERENCE OF WAVES
1. What is coherent sources of waves?
2. What is the principle of superposition?
3. What is constructive interference?
4. What is destructive interference?
5. What is meant by interference?
6. Name the point where constructive interference occurs.
7. Name the point where destructive interference occurs.
8. Name an instrument that produces sound at certain frequency in experiment to
determine the pattern of interference of sound waves.
9. Give an equation that relate the wavelength, a, x and D.
10.Draw fringes formed from interference of light waves.
ANALYSING ELECTRIC FIELD AND CHARGE FLOW
1. Name two type of charges.
2. Name a machine used to produce and store charge.
3. What is electric current?
4. What is the S.I unit of electric current?
5. What is the S.I unit of electric charge?
6. What is an electric field?
7. What electric field lines of force?
8. What is the direction of electric field?
9. Why cooking oil is used in the experiment to observe the pattern of electric
10.What happens to a polysterene ball coated with Aluminium paint placed inside an
electric field produced by two parallel plates of opposite charges?
ANALYSING THE RELATIONSHIP BETWEEN ELECTRIC CURRENT AND POTENTIAL DIFFERENCE.
1. What is potential difference?
2. What is the unit of potential difference?
3. What is Ohm’s Law?
4. What is Resistance?
5. What are the factors that affect resistance of a wire?
6. What happen to the resistance of a wire when the temperature increases?
7. Between Constantan, Eureka and Copper, which has the lowest resistance?
8. What is the relationship between length of wire and the resistance?
9. The thicker the wire, the ...........the resistance.
10.What is s superconductor?
ANALYSING SERIES AND PARALLEL CIRCUIT
1. What is a series circuit?
2. What is a parallel circuit?
3. Which circuit arrangement will produce less resistance?
4. Why household wiring circuit such as the lamp are connected in parallel?
5. In series circuit, the current passing through the resistor is the .............
6. What can you say about the effective resistance in series cicuit?
7. What can you say about the total potential difference in series circuit?
8. In parallel circuit, the voltage across secah resistor is the ....................
9. What can you say about the current passing through each resistor connected in
10.Give the formula to calculate the effective resistance in parallel circuit.
ELECTROMOTIVE FORCE ,INTERNAL RESISTANCE, ELECTRICAL ENERGY AND ELECTRICAL POWER.
1. What is e.m.f?
2. What is internal resistance?
3. State the formula involving e.m.f, potential difference,V and internal
4. What is the shape of graph V against I in the experiment to determine the e.m.f
and internal resistance.
5. What is electrical power?
6. Give 2 formula to calculate electric power.
7. What is the relationship between electrical Energy and electrical Power
8. Give 3 formula to calculate electrical energy.
9. 1 kwh= ...........J
10.Give the formula to calculate the amount of electrical energy consumed.
-ANALYSING THE MAGNETIC EFFECT OF A CURRENT CARRYING CONDUCTOR
1. What is magnetic field?
2. What is the pattern of magnetic field due to a current in a straight wire.
3. What is the rule used to determine the direction of magnetic field in a straight
wire carrying current?
4. What is the pattern of magnetic field due to a current in a coil.
5. What is the factors that will increases the strength of magnetic field due toa
current in a coil?
6. What is the pattern of magnetic field due to a current in a solenoid.
7. Explain how to determine the direction of magnetic field in a solenoid.
8. What is an electromagnet?
9. What are the factors affecting the stregth of an electromagnet?
10.Name two application of electromagnet.
UNDERSTANDING THE FORCE ON A CURRENT CARRYING CONDUCTOR IN A MAGNETIC FIELD
1. What happen to a a conductor carrying current placed in magnetic field?
2. What is catapult field?
3. What rule can be used to determined the motion of a conductor in a magnetic field?
4. Explain Fleming’s left hand rule.
5. What are the factors that influences the magnitude of force on a cuurent carrying
conductor in a magnetic field?
6. What happen when a coil carrying current is placed in a magnetic field?
7. What are factors that can increase the turning effect of current carrying coil?
8. Name two applications of the turning effect of a current carrying coil in a
9. In a moving coil voltmeter why curved permanent magnet are used?
10 What is the used of commutator in a d.c. motor?
ANALYSING ELECTROMAGNETIC INDUCTION
1. What happen when a straight wire connected to centre zero galvanometer is moved
between a pair of magnadur magnets?
2. What happen when bar magnet is pushed in and out of a solenoid connected to a
centre zero galvanometer?
3. What is electromagnetic induction?
4. What rule can be used to determine the direction of induced current produced when
a wire moves and cut the magnetic field lines?
5. Explain the Fleming’s right hand rule.
6. States lenz law.
7. States Faraday’s law.
8. What are the factors that influences the magnitude of induced current produced?
9. Name one application of electromagnet induction.
10.Give the differences between direct current and alternating current.
1. What is a transformer?
2. Name two type of transformer.
3. What is a step up transformer?
4. Why does the transformer not work with a d.c power supply?
5. Give the formula involving Vp,Vs,Np and Ns.
6. What is an ideal transformer?
7. Why in a trans former the efficiency is not 100%?
8. What are the factors that affect the efficiency of a transformer?
9. How to overcome the energy loss due to Eddy Current?
10.How to overcome the energy loss due to the magnetization and demagnetization of
UNDERSTANDING THE GENERATION AND TRANSMISSION OF ELECTRICITY.
1. Name two resources of energy to generate electricity.
2. What the factors that cause the power loss in the transmission of electricity?
3. Give two method to reduce the power loss during the transmission of electricity.
4. Why the electrical power is transmitted at very high voltage?
5. What is the National grid Network?
6. What is used to increase an d decrease the voltage during the transmission of
7. Give the formula to calculate the heat loss during transmission of electricity.
8. Why hydro is normally chosen as a method of generation of electricity?
9. Give a disadvantage of using hydro as the source of generating electricity/
10.Give 2 disadvantages of using oil and natural as the source of generating
UNDERSTANDING THE USES OF CRO
1. What is thermionic emission?
2. What is Cathode Ray?
3. What is the use of Maltese Cross Tube?
4. What are the properties of Cathode Ray?
5. Give 3 main component of Cathode Ray Oscilloscope.
6. What is electron gun?
7. Why Fluorescent Screen is used in CRO?
8. Give 3 uses of CRO.
9. Which knob on CRO is used to control the sharpness of bright spot.
10.What is the use of Y gain knob?
UNDERSTANDING SEMICONDUCTOR DIODES
1. What is a semiconductor?
2. Give two examples of pure semiconductors.
3. What is doping process?
4. What is hole?
5. Name two types of artificial semiconductors.
6. How p-n junction is formed?
7. What is a diode?
8. Explain what happen to the flow of current if the diode is connected in forward
9. What is a rectifier?
10.Name two types of Rectification.
1. What is a transistor?
2. Give 2 types of transistor.
3. What is the difference between npn transistor and and pnp transistor.
4. What are the uses of Transistor?
5. What is the function of LDR in a transistor switching circuit?
6. What is a potential divider circuit?
7. Give a formula to calculate the voltage across LDR in a voltage divider circuit.
8. What is the function of thermistor in heat controlled automatic switch circuit?
9. What is the function of a relay switch?
10.Why a resistor is always connected to the base of a transistor?
ANALYSING LOGIC GATES
1. What is logic gates
2. Name 3 types of logic gate.
3. The diagram above represents which logic gates?
4. The symbol above represents which logic gates?
5. The symbol above represents which logic gates?
6. Name a gate that is produced from combination of a AND gate and a NOT gate.
7. Name a gate that is produced from combination of a OR gate and a NOT gate.
8. What is a truth table?
9. Give the Boolean Ajebra for AND gate.
A B Y
0 0 0
0 1 0
1 0 0
1 1 1
Which gate represented the truth table above?
UNDERSTANDING THE NUCLEUS OF AN ATOM
1. What is a nucleus?
2. What is proton?
3. What is an atom?
4. What is proton number,Z?
5. What is mass number, A?
Given a symbol of an atom
6. What is the proton number, Z of U?
7. What is the mass number, A of U?
8. What is the number of neutron in U?
9. What is an isotope?
10.How many isotopes does Hydrogen has?
ANALYSING RADIOACTIVE DECAY
1. What is radioactivity?
2. Name 3 types of radioactive emissions.
3. Name 3 type of detectors.
4. Name a detector which is most suitable to detect beta emission.
5. What is ray?
6. Which ray has the highest penetrating power?
7. Which ray has the highest ionizing power?
8. Which ray is not affected in magnetic field?
9. What is hal life?
10.Give 3 types of radioactive decay.
UNDERSTANDING THE USES OF RADIOACTIVES
1. What is radioisotopes?
2. Name 3 fields that uses radioisotope in the operation.
3. Give one application of radioisotopes in medicine.
4. Give one application of radioisotopes in agriculture.
5. Give one application of radioisotopes in industry.
6. Given 3 radioisotope of different half life, 25 years, 5 hours and 2 minutes.
Which radioisotope is the most suitable to be used to detect water leakage in the
7. 3 radioisotope of different state,solid,liquid and gases. Which state of
radioisotope is the most suitable to be the source in controlling the thickness
of a sheet of paper?
8. Explain why solid state of radioisotope is chosen to be the source of
radioisotope in controlling the thickness of a piece of paper.
9. What is the radioisotope that can be used to determine the age of a dead plant?
10.Explain how radioisotope was used to control the insect pest from destroying the
UNDERSTANDING NUCLEAR ENERGY
1. What is nuclear Fission?
2. What is chain reaction?
3. What is release after fission process?
4. What is nuclear Fusion ?
5. What is the equation that relate between mass and energy.
6. What is mass defect?
7. What is a nuclear reactor?
8. What is the use of Boron in the nuclear reactor?
9. What is the use of Graphite core in the nuclear reactor?
10. What is the use of concrete shield in the nuclear reactor?