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THE PRESIDENT’S OFFICE

REGIONAL ADMINISTRATIVE AND LOCAL GOVERNMENT

FORM TWO EXAMINANTIONS SEPT 2022

NEW NECTA FORMAT

031PHYSICS

TIME: 2:30HRS                                                                    

INSTRUCTIONS

1. This paper consists of sections A, B and C with a total of ten(10) questions
2. Answer ALL questions in the space(s) provided 
3. All writings must be in blue or black ink except drawings which must be in pencil
4. All communication devices and calculators are not allowed in the examination room 
5. Write your Examination number at the top right corner of every page.
6. Where necessary the following constant may be used 

(i) Acceleration due to gravity g=10m/s²

(ii) Density of water = 1g/cm³ or 1000kg/m³

SECTION A (30MARKS)

Answer ALL questions from this section

1. For each of the items (i)- (xx), choose the correct answer among the given alternatives and write its letter besides the item number in the box provided 

(i) Force of attraction between molecules of two different substances is called…………

A. cohesion     B. adhesion     C. capillarity                D. surface tension 

(ii) A piece of metal has mass of 0.64g and volume of 0.16cm³. What will be its density?

A. 4000kg/m³              B. 0.25kg/m³               C. 3.0kg/m³                 D. 4kg/m³

(iii) The minimum pressure exerted by rectangular wooden block of 12kg measuring 4mx 3m x 2m on the bench is 

A. 20N/m²                   B. 1.5N/m²      C. 10N/m²       D. 0.5N/m²

(iv)  The pressure of water at the bottom of a pond 6.5m deep is……

A. 65,000N/m²                        B. 6,500N/m²               C. 320N/m²                 D. 340N/m²

(v) If the upthrust is greater than the weight of a body then the body 

A. floats imperfectly               B. floats perfectly       C. rises            D. sinks 

(vi) A body weights 11.8N when totally immersed in a liquid, if the weight of the liquid displaced is 4.2N, the weight of the body in air is………

A. 7.6 N                      B. 16N                        C. 2.8N                       D. 49.56N 

(vii) A solid ball is taken from the earth to the moon. On the moon the ball has different….

A. density                   B. weight                    C. mass            D. volume 

(viii) Which of the following devices work with the help of atmospheric pressure? 

A. bicycle pump and hydrolysis press.                       B. flushing tank and syringes 

C. lifts pumps and hydrometer                                   D. car brakes and siphon

(ix) A current of 0.4A flows through a resistance of 7Ω, the potential difference across the resistance is…………….

A. 20V                        B. 2.8V                       C. 0.05V                     D. 3.2V 

(x) The density of water is 1g/cm³ and mercury is 13.6g/cm³. The object of density 2.5g/cm³ will sink in……..

A. mercury                  B. water                      C. hydrometer             D. manometer             

2. Match each item in List A with a correct response in list B by writing a letter of a correct response below the number of the corresponding item in List A in the table provided 

ANSWERS

SECTION B (70 MARKS)

Answer all questions from this section

3.(a)  Complete each of the following statements by writing the correct answer in the space provided 

(i) The ratio of charge to its potential difference is called…………………………………

(ii) The point of support about which a bar of lever turns is called………………………

(iii) The movement of solvent from region of low concentration to one of high concentration through semi- permeable membrane is called……………………………

(iv) An object which emits light when hot is called……………………………………….

(v) The rate of change of displacement is called………………………………………….

(b) Define the word coulomb.

(c) States Ohms law.

(d) Two resistors of 3Ω and 6Ω are connected in parallel to a 3V battery.

(i)Draw the schematic diagram.

(ii)Find the effective resistance of the circuit.

(iii)Calculate the current passing through the 60 resistor.

4. Study the figure below showing magnets facing each other and answer the questions that follows;

 (a) Name parts labeled P, Q, R, S and T

(i) P is…………………………………          (ii) Q is……………………………………... 

(iii) S is ……………………………….          (iv) T is …………………………………….

(v) R is ………………………………..

(b) Define the following terms 

(i) Magnetic field ………………………………………………………………………….

……………………………………………………………………………………………...

(ii) Demagnetization……………………………………………………………………….

……………………………………………………………………………………………..

 (c) Mention three methods that you can use so as to change a piece of steel and become a magnet 

(i) ………………………………………..(ii)…………..………………………………..

(iii) ……………………………………………

5(a) Distinguish between speed and velocity ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(b) An object starts from rest to a velocity of 20m/s for 5 seconds; it maintains this speed for 20seconds before applying brakes and come to rest after 10seconds 

(i) Sketch the velocity time graph of this motion 

From the graph above, find 

(ii) Acceleration

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(iii) Deceleration 

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(iv) Distance covered by whole motion

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(v) Average speed of this motion ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………...

(c) Define the term “Uniform acceleration ………………………………………………………………………………………………………………………………………………………………………………………………………………

6(a)       (i) State the “law of floatation”………………………………………………………………………………………………………………………………………………………………………………………………………………

(ii) State Archimedes principle

....................................................……………………………………………………………...........

………………………………………………………………………………………………………

(b) An aluminium ball weights 6N in air, 4N when immersed in water and 3N when immersed in honey. Calculate;

(i) Up thrust of honey on the ball

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(ii) Relative density of aluminum ball.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(iii) Relative density of honey 

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(iv)  Density of honey in kg/m³

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(c) Why is a hydrometer graduated with minimum reading at the bottom?

………………………………………………………………………………………………………………………………………………………………………………………………………………

7(a) Define the following terms 

(i) Machine ………………………………………………………………………………………………………………………………………………………………………………………………………………             (ii) Mechanical advantage ………………………………………………………………………………………………………………………………………………………………………………………………………………(iii) Velocity ratio ……………………………………………………………………………………………………………………………………………………………………………………………………………...(b) Draw a pulley system with velocity ratio (VR) 5

 (c) The pitch (P) of a screw jack is 2.5mm. An arm of 56cm long is used to lift a car of mass 792kg if the efficiency of the screw jack is 25%. Find 

(i) Velocity ratio ………………………………………………………………………………………………………………………………………………………………………………..………………..…………… (ii)  Effort to be applied at the end 

………………………………………………………………………………………………………………………………………………………………………………………………………………

8(a) (i) define the term pressure and state its SI unit 

………………………………………………………………………………………………………………………………………………………………………………………………………………

(ii) Why are dams constructed thicker at the bottom than at the top?

………………………………………………………………………………………………………………………………………………………………………………………………………………

(b) Mention five (5) sustainable energy sources

            (i) ………………………………………………………………………………………

            (ii)……………………………………………………………………………………...

            (iii)…………………………………………………………………………………….

            (iv) ……………………………………………………………………………………

(v) ……………………………………………………………………………………..

(c) Explain why mercury is preferred more as thermometer liquid than alcohol (outline three reasons) 

(i)………………………………………………………………………………………

(ii)…………………………………………………………………………………….

(iii)…………………………………………………………………………………….

9. (a) Define the following terms 

(i) Inertia 

            ………………………………………………………………………………………………            ………………………………………………………………………………………………

(ii) Momentum 

            ………………………………………………………………………………………………            ………………………………………………………………………………………………

(iii) Impulse

            ………………………………………………………………………………………………(b) State Newton’s second law of motion 

            ………………………………………………………………………………………………            ………………………………………………………………………………………………

(ii) State the following 

1^st Equation of motion ……………………………………………………………………

2^nd equation of motion ……………………………………………………………………

3^rd equation of motion ……………………………………………………………………

(c) A  ball “A” of mass 100g moving with a velocity of 5m/s makes a head on collision with a ball “B” of mass 200g moving with velocity of 2m/s in opposite direction. If A and B stick together after collision, calculate their common velocity “V” in the A. 

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

SECTION C (15 MARKS)

Answer all questions from this section

10 (a ) Sketch the electrical symbol for each of the following devices. 

(i) Voltmeter 

(ii) Switch 

(iii) Battery 

(iv) Variable resistor 

(b) Calculate the effective resistance to the current flowing when resistors 4Ω, 2Ω and 5Ω are connected in 

(i) Series 

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………....

(ii) Parallel 

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

(c) Find the effective capacitance in the connection below.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

THE PRESIDENT’S OFFICE

MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

SECONDARY EXAMINATION SERIES

PHYSICS MID TERM EXAMINATIONS AUG/SEPT 

FORM TWO-2021

Time: 2:30Hours

Instructions.

1.                This paper consists of section A, B and C with a total of 10 questions
2.                Answer all questions.
3.                 Section A carries 30 marks, section B 50 marks and section C 20  Marks
4.                 All answers should be written in the spaces provided.
5.                All communication devices, calculators and any unauthorized material are not allowed in examination room.
6.                Write your number on every page of your answer booklet.
7.                Where necessary, the following constants may be used;

1.                      Acceleration due to gravity, g=10m/s²
2.                      Density of water= 1g/cm³ or 1000kg/m³

 SECTION A (30 Marks)

 Answer All questions in this section.

 1.  For each of items (i-xx) choose the correct its letter in the box provided

(i) Bimetallic strips bend when heated because metals:

1.              become softer when heated
2.               expand in opposite direction
3.               have different expansivities
4.              have same expansivities

(ii)If you comb your dried hair with a plastic or nylon comb, you might observe the comb attracting some small particles. What instrument would you use to determine whether the comb acquired some electric charge:

1.              ammeter
2.               electrophorus
3.               gold-leaf electroscope
4.              voltmeter

(iii)White clothes are preferentially worn in sunny regions to black clothes because they:

1.              absorb heat
2.               diffuse heat
3.               reflect heat
4.              transmit heat

(iv)Gradient of the distance-time graph of a uniformly accelerated motion in a specific direction represents:

1.              acceleration
2.               deceleration
3.               speed
4.              velocity

(v)In order to balance a rigid body on a point, you must first determine its:

1.              balancing point
2.               central position of the body
3.               centre of gravity
4.              neutral point

(vi) A soldier firing a bullet from a gun experiences a jerking effect as the bullet leaves the gun. This phenomenon is explained by: 

1.              Newton’s first law of motion
2.               Newton’s second law of motion
3.               Newton’s third law of motion
4.              Principle of conservation of linear momentum

(vii)Penumbra refers to:

1.               light shadow
2.               moon
3.               .partial shadow
4.              total shadow

(viii)Charging an object by friction results in the transfer of particles called:

1.               atoms
2.               .electrons
3.               neutrons
4.              protons

(ix)A body weights 3.0N in air. When it is completely immersed in a liquid it weighs 2.2N, the upthrust experienced by the body is:

1.               0.4N 
2.                0.6N 
3.                0.8N
4.               1.0N

(x)When a bus is moving with constant velocity, its acceleration is:

1.               constant
2.               .minimum
3.               maximum
4.              .zero

(xi) As the balloon goes up, the weight of air displaced becomes less and less. This means that the upthrust: 

1.               is increased
2.               .is reduced
3.               .is exactly equal to its weight
4.              .remains constant

(xii)A boy weighing 45kg climbs up a stair case to height of 7 m in 5 seconds. The amount of work done by the boy:

1.              70 J
2.               105J 
3.                450J
4.               315J

(xiii)Ohm is the SI unit of:

1.               conductance
2.               .electric current
3.               .potential difference 
4.              upthrust and weight

(xiv)The property of a material to recover its original shape and size on removal of a stretching force is called:

1.               compression 
2.                elasticity
3.                elastic limit 
4.               plasticity

(xv)The area under the velocity-time graph represents:

1.              acceleration 
2.               distance covered 
3.               speed 
4.              velocity

(xvi)The volume of a piece of metal with a mass of 150g and density of 0.03g/cm³ is:

1.               5 x 10-3 cm ³
2.                5 x 10 ¹ cm ³
3.                5 x 10 ² cm ³
4.               5 x 10 ³ cm³

(xvii)A potential difference of 12V is applied across a resister of 1200, The current in circuit is:

1.               0.1A 
2.                10A 
3.                132A 
4.               440A

 (xviii) What makes the last drop of tap water remain hanging for sometime at the outlet of the tap soon after closing the tap?

1.               Capillarity 
2.                Osmosis
3.                Surface tension 
4.               Viscosity

(ix)The best test for a magnetized material is:

1.                attraction
2.               friction
3.               heating
4.              .repulsion

(xx)A passenger in a bus which starts to move forward tends to fall backwards. This phenomenon demonstrates:

1.              Newtons first law of motion
2.               Newtons second law of motion
3.               Newtons third law of motion
4.              The law of conservation of linear momentum

2.Match the items in List A with responses in List B by writing the letter of the correct response beside the item number.

(i)The quantity of space that an object occupies is known as 

(ii)Occurs when a body’s rate of change of displacement is constant 

(iii)A physical quantity measured by using thermometer is referred to as

(iv)Causes an object to rotate or turn about a fixed point

(v)The angle between the geographic north and the magnetic north is called 

SECTION B (50 Marks)
Answer all questions in this section.

SECTION B

4.(a) State two conditions for a body to be in equilibrium.

(b) Distinguish between centre of mass and centre of gravity.

(c) A uniform metre rule AB is balanced horizontally on a knife edge placed 5cm from B with a mass of 60g at B. Find the mass of the ruler.

5.(a) List down four uses of hydraulic press.

(b) Why is a hole at the bottom of a ship more dangerous than one that is near the surface?

(c) Calculate the pressure at the bottom of the sea water 52m deep, if the density of water is 1025 Kg/m³. Take the acceleration due to gravity (g) as ION/Kg.
 

6.(a)What is meant by acceleration?

(b) In which case is acceleration said to be uniform?

(c) A car with a velocity of 90km/h is uniformly retarded and brought to rest after 10 seconds. Calculate its acceleration.

7. What do you understand by the following terms?

(i) Work 

(ii) Energy 

(iii) Power 

(b) Calculate the power of a pump which can lift 200kg of water through a vertical height of 6m in 10 seconds, given g =10m/s².

(c) Explain the meaning of the following terms:

(i)Kilowatt . 

(ii)Kilojoules . 

8.(a) Elasticity can be defined as .

(b) Mention two methods by which a magnetic substance can be turned into a magnet. 

(c) Two types of intermolecular forces are: 

SECTION C (20 Marks)
Answer all questions in this section.

9.a) A Voltmeter connected across an electric bulb reads 3 V and an ammeter in series with a battery of 2 cells reads 0.2 A. If the switch is closed:

(i)Draw a circuit diagram to represent the information

(ii)Calculate the resistance of the electric bulb.

b)(i) State the law of static electricity

(ii) Draw electric fields for the following static charges showing neutral (N) points

10.A load of 500 Newton is raised through 5 metres by a machine when its effort moves simultaneously through a distance of 25 metres along its direction. If the machine has an efficiency of 80% calculate the value of the effort and the total work done by the machine.

THE PRESIDENT'S OFFICE

MINISTRY OF REGIONAL GOVERNMENT AND LOCAL GOVERNMENT

AUGUST-SEPTEMBER   EXAMINATION SERIES

PHYSICS  FORM-2

2020

TIME: 2:30 HRS

Instructions 

1.  This paper consists of sections A, B and C with a total of ten (10) questions.

2.  Answer all questions.

3.  All answers must be written in the spaces provided

4.  All writing must be in blue or black ink except drawings which must be in pencil.

5.  All communication devices, calculators and any unauthorized materials are not allowed in the examination room.

6.  Write your Examination Number at the top right hand corner of every page.

7.  Where necessary the following constants may be used:

(i) Acceleration due to gravity, ³ g = 10m / s². 3 (ii) Density of water = 1g / cm or 1000kg / m .

SECTION A (30 MARKS)

1. For each of the items (i) - (xx), choose the correct answer from the given alternatives and write its letter in the box provided.

(i)  Why Physics, Chemistry and Biology are natural science subjects?

1.  They need practical and theory work for learning.
2.  They need only theory for learning.
3.  They need practical work only.
4.  They need only observation.

 (ii)  Which of the following is a safety precaution in the Physics laboratory?

1.  Doing experiment in the laboratory
2.  Handling of apparatus in the laboratory
3.  Use equipment with care in the laboratory
4. Do anything in the laboratory

 (iii)  Which instrument will you use to measure accurately the inside diameter of a bottle neck?

1.  tape measure.
2.  micrometer screw gauge.
3.  metre rule.
4. Vernier calipers.

 (iv)  Which of the following statements is correct about mass?

1.  It is measured by beam balance
2.  It is measured by spring balance 
3.  It varies with place 
4.  It can be zero.

 (v)  A hydrometer is an instrument used to measure

1.  the volume of liquids. 
2. the density of liquids.
3. the density of solids.
4. the volume of solids.

(vi)One of the following is the condition for a body to float in water:

1. The mass of a floating body is greater than displaced water.
2. The density of the body must be less than the density of the fluid.
3. The upthrust due to the liquid must be smaller than the weight of the body.
4. The displaced water is less than the floating body.

 (vii)In a solid state the force of attraction between molecules is greater because particles are:

1. closely packed together.
2. somehow apart.
3. not closely packed together.
4. moved so randomly.

 (viii)The phenomenon observed when maize flour is poured on top of water is called:

1. diffusion. 
2.  capillarity.
3. surface tension.
4. osmosis.

 (ix)Density and height are factors which affect pressure in:

1. solid.
2. solid and liquid.
3. liquid.
4. gas.

 (x)When a body is performing a work, it is said to have:

1. moment.
2. energy.
3. momentum
4. work.

(xi)How can a real image be distinguished from a virtual image?

1. Real image is inverted while virtual image is upright.

2. Real image is upright while virtual image is inverted.

3. Virtual image is formed by convergent rays while real image is formed by divergent rays.
4. Real image is formed by convergent rays while virtual image is formed by divergent rays.

 (xii)Why is an atom electrically neutral?

1. It consists of equal number of electrons
2. It consists of equal number of protons and electrons.
3. It consists of equal number of electrons and neutrons.
4. It consists of equal number of protons and neutrons.

(xiii)A potential difference of 12V is applied across a resistor of resistance 24 0. The current in a circuits is:

1. 0.5A
2. 2A
3. 0.5?
4. 288?

 (xiv)If a North pole is used in the stroking method of magnetization, the end where the stroking begins is:

1. South pole 
2. North pole 
3. West
4.  East.

 (xv)Figure 1 shows a ruler balanced by placing the loads at its ends. What is the weight X?

Figure 1

1. 5N
2. 0.5N
3.  IOON 
4.  200N

(xvi)ln Figure 1 the angle of reflection is equal to:

Figure. 1

1. 50⁰
2. 40⁰
3. 130⁰
4. 45⁰

 (xvii) Unlike magnetic poles as well as unlike electric charges, when brought close to each other they tend to

1. attract each other
2. repel each other
3. exist in pairs
4. separate

 (xviii)The resistance of on operating lamp rated 115 V and 0.25 A is

1. 460 ?
2. 29 ?
3. 114.75 ?
4. 230 ?

 (xix)In which region can the north pole of a magnet be directed?

1. Towards the geographic North Pole
2. Towards the geographic South Pole
3. Along the Equatorial
4. Along the Coast of Antarctica

(xx)Ability of man to walk properly along a road is one of the applications of

1. stable equilibrium
2. unstable equilibrium
3. neutral equilibrium
4. neutral and stable equilibrium

2.Match each item in List A with a correct response in List B by writing the letter of the correct response below the number of the corresponding item in List A in the table provided

3.Complete each of the following statements by writing the correct answer in the space provided.

(i)Basic physical proportions of measurement which cannot be obtained from any other proportions by either multiplication or division are called. ...

(ii)Staircases, winding roads uphill, wedges and a screw are physical examples of .....

(iii)The resistance of a body to change its state of rest is called ....

(iv)Objects that emit light when they are hot are called ....

(v) Materials which do not obey Hooke's law are known as ......

SECTION B (50 MARKS)

4. (a) Define the following terms as applied in measurements and give two examples:

 (i) Fundamental quantities ______________

 (ii) Derived quantities __________________

 (b) Figure 2 shows a graduated cylinder containing water before and after a stone is immersed.

Figure 2

 If the mass of the stone is 50 g, calculate the 

 (i) Volume of the stone.

 (ii) Density of the stone.

5.  (a) (i) List two characteristics of images formed by plane mirrors. 

 (ii) Giver a reason why the sky appears blue during a clear sunny day?

 (b)  Draw the diagram of each of the following:

(i)  Parallel rays of light.

(ii)  Divergent rays of light.

(iii)  Convergent rays of light.

6.  (a) Define the term “force” and state its SI unit

(b) A spring balance reads 12 N when a metal block is suspended from it and 10 N when the block is completely immersed in water. Calculate the: 

(i)  Upthrust on the block

(ii)  Relative density of the block

7.  (a) (i) State the law of conservation of linear momentum. 

  (ii) Define the term “elastic collision”.

(b) A body of mass 8 kg moving with a velocity of 20 m/s collides with another body of mass 4 kg moving with a velocity of 10 m/s in the same direction. The velocity of the 8 kg body is reduced to 15 m/s after the collision. If the bodies do not stick together after the collision, calculate the final velocity of the 4 kg body.

8.(a) Define each of the following terms as applied in physics:

(i)Work

(ii)Energy

(iii)Power

(iv)Density

(b) A force of ION acts on a stationary object of 5kg. This action causes an object to move along a smooth horizontal surface for 8 seconds before  stopping. What is the velocity of the object?

SECTION C.

9.(a) What is energy?

(b) State the principle of conservation of energy.

 (c) A motor exerts a horizontal force of 200N in pulling a box 10m across a level floor. How much work did the motor do?

10. (a) Define the word coulomb.

(b) States Ohms law.

(c) Two resistors of 30 and 60 are connected in parallel to a 3V battery.

(i)Draw the schematic diagram.

(ii)Find the effective resistance of the circuit.

(iii)Calculate the current passing through the 60 resistor.