PRESIDENT OFFICE REGIONAL ADMNISTRATION

AND LOCAL GOVERNMENT

SECONDARY EXAMINATION SERIES 

COMPETENCE BASED ASSEMENT

PHYSICS FORM TWO 

MID-TERM EXAMS MARCH – 2023 

031

Time:2:30Hours

Instructions

1. This paper consists of sections A, B and C with a total of ten (10) questions.
2. Answer all questions
3. Sections A and C carry fifteen (15) marks each and section B carries seventy (70) marks
4. All answers must be written in the space provided
5. All writing must be in blue or black ink except drawings which must be in pencil
6. All communication devices, calculators and any unauthorized materials are not allowed in the assessment room.
7. Where necessary the following constants may be used:
8. Acceleration due to gravity, g=10m/s²
9. π = 3.14

SECTION A

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

(i) Which one of the following arguments describes the mathematical language used in physics 

1. Matter occupies space
2. Density is mass per volume
3. Volume is amount of space occupied by the body
4. Physics is a branch of science.

(ii) A student has got an electric shock and felt unconscious in the physics laboratory. Which decision would you take to help the victim immediately?

1. Administer breath exercise
2. Call the Physicist
3. Call other students
4. Contact a medical Doctor 

(iii) Why are machine engines filled with oil lubricant?

1. Reduce friction between moving particles
2. Increase the viscosity between moving particles 
3. To return the twisted solids to their former state.

(iv) Why does it take a shorter time for a perfume to diffuse in air than in water?

1. Air molecules are fresh compared to water
2. Air molecules are packed closer compared to those of air.
3. Water molecular are less far apart compared to those of air
4. Water molecule move with higher speed compared to those of air

(v) A cooking oil was mixed with water and poured into a measuring cylinder and allowed to settle for 3 minutes. Which one will be observed phenomena

1. Cooking oil floats over water
2. Meniscus of water appeared convex in shape at the surface
3. Water floating on the oil
4. Water and oil completely mixed up

(vi) If two cars are both travelling at 50km/h and they collide head on, the effect is similar to a car colliding with Walter what velocity?

1. 0km/h
2. 10km/h
3. 50km/h
4. 100km/h

(vii) When a large body of experimental evidences support or does not support the hypothesis, what may hypothesis eventually be considered?

1. Observation
2. Insight
3. Conclusion 
4. Law

(viii) An engineer wanted to measure the diameter of a wire to the nearest 0.001cm, which of the following instruments will be used.

1. Metre rule
2. Measuring cylinder
3. Micrometer screw gauge
4. Vernier caliper

(ix) The term used to describe the ability to of an object to float on a surface of a liquid is classified is

1. Floatation 
2. Buoyancy
3. Density 
4. Pressure

(x) Materials can be twisted into different shapes. Which among the following forces cause twisting of elastic materials 

1. Restoring force
2. Compressional force
3. Stretching force
4. Torsional force

2. Match each of the description of the terms used in simple machines in List A with the corresponding concept used in simple machine in List B by writing a letter of the correct response below the item in table.

SECTION B (70 Marks)

Answer all questions

3. (a)State laws of reflection

(b)Explain behavior of light when it encomters translucent, transparent and Opaque materials 

Calculate number of images formed by plane mirror related to the angle between two plane mirrors 

4. (a)(i)Differentiate distance and displacement

(ii)Write down three equations of linear motion 

(b)A paratrooper falling under gravity after 6 seconds

(i) What will be maximum height covered 

(ii) What will be its velocity when hitting the ground 

5.(a)Explain why efficiency of machine is always less than 100%

(b)An object weight in air is 6ON and 4ON when immersed in water. What will be its

(i) Upthrustin water

(ii) Relative density 

(iii) Density 

(iv) Give reason why a ship can move surface of water without sinking?

6. (a)When a metal can that contains hot water is closed and cold water is poured on it the can collapses, why?

(b)In an experiment Using Hare’s apparatus the length of methanol and water columns were found to be 16cm and 12.8cm respectively

(i) What is the relative density of methanol?

(ii) If the length of methanol column was altered to 21.5c what would be the new height of water column?

7. (a)Differentiate ferromagnetic materials from Paramagnetic materials by giving their typical examples and uses 

(b)Advice a laboratory technician three appropnate ways of slowing magnets so that they can last longer.

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

(i) Volume                       (ii) Moment of force

(b) An object of 100kg is lifted to a height of 5M above the ground is 3 seconds. Calculate its 

(i) Work done             (ii) Power

9.(a)Define the term pressure 

(b)A rectangular object whose dimension are 1.4m by 0.1m by 2.0m, has a density of 200kg/m³. Calculate the minimum pressure when placed on a table.

SECTION C (15 Marks)

Answer Question 10

10. (a)

1. Define the word coulomb
2. State Ohms law
3. Two resistors of 30 and 60 are connected in parallel to a 3V battery

(b) 

1. Draw a schematic diagram 
2. Find effective resistance of the circuit
3. Calculate the current passing through the 60 resistor

                                            PRESIDENT’S OFFICE

REGIONAL ADMNISTRATION AND LOCAL GOVERNMENT

MID TERM ONE EXAMINATIONS 

PHYSICS  FORM TWO

       031                                                                      

TIME: 2:30 HOURS                                                         March 2022

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 writings must be in blue or black ink EXCEPT drawings which must be in pencil.

5.      Calculators, cellular phones and any unauthorized materials are not allowed in the examination room.

6.      Write Your Examination Number on the top right of every page.

7.      You may use the following constants in your calculations: (i) Density of water = 1.0 g/cm³ or 1000kg/m³ (ii) Acceleration due to gravity, g = 10m/s².

SECTION A: (30 Marks)

Answer all questions in this section

1.For each of the items (i) – (xx), choose the correct answer among the given alternatives and write its letter beside the item number: (i)       One joule work is said to be done when:

A.    A force of IN displaces a body by 1cm in direction of force

B.     A force of IN displaces a body by 1m in direction force

C.     A force of IN displaces a body by 1km in direction of force 

D. A force of IN displaces a body by 1mm in direction of force. 

(ii)              In an electric cell while in use, the change in energy is from:

A. Electrical to mechanical B. Chemical to mechanical

C. Electrical to chemical D. Chemical to electrical.

(iii)            Diffusion occurs more quickly in a gas than in a liquid because:

A.    The liquid contains a layer on its surface

B.     The gas contains semi-permeable membrane

C.     The gas molecules is small in size compared to the liquid molecules

D.    The speed of molecules in gas is greater than in liquid.

(iv)             In a process of charging by induction in static electricity:

A.    A conductor is rubbed with an insulator

B.     A charge is produced by friction

C.     Negative and positive charges are separated

 D.A positive charge induces a positive charge.

(v)               For an ideal machine, the ratio of mechanical advantage and velocity ratio is: A. Greater than one

B.     Less than one

C.     Equal to one

D.    Depends on value of load.

(vi)             An object weighs 12N in air and 9N when totally immersed in water. The relative density of the object is:

A.    3g/cm³

B.     4g/cm³

C.     3

D.    4.

(vii)          The rise of a liquid level in a tube due to cohesion and adhesion forces is called:

A.    Capillarity

B.     Surface tension 

C. Meniscus

D. Osmosis.

(viii)        The hydrometer is calibrated in such a way that has small number at the top of its stem, this is because:

A.    It sinks more in less denser liquids than in more denser liquids

B.     It sinks less in less denser liquids than in more denser liquids C. To enable it to stand up right when taking measurements

D. To make it more sensitive.

(ix)             The density of pure solid copper is 8.94g/cm³. What volume does 5 kilograms of copper occupy? A.559.3cm³

B.     0.5593cm³

C.     44.7cm³ 

D. 1.788cm³.

(x)               The temperature of Dar es Salaam town was 32^oC. This is equivalent to….

A. 306K B. 241K

C. 305K D. 205K.

(xi)             An instrument which can be used to observe objects out of direct vision is called:

A.    Microscope

B.     Periscope

C.     Plane mirror

D.    Telescope.

(xii)          A ball of mass 0.6kg is kicked vertically upwards up to a height of 6m. The potential energy acquired by the ball is:

A.    0.36J

B.     3.6J

C.     36J 

D. 360J.

(xiii)        A measuring cylinder contains liquid to a level X. An object of volume Z is totally immersed in the liquid contained in the cylinder. The new reading of the liquid level will be:

A.    Z

B.     X-Z

C.     X+Z 

D. Z-X.

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

A.    Newton’s first law of motion

B.     Newton’s second law of motion

C.     Newton’s third law of motion

D.    Principle of conservation of linear momentum.

(xv)           The image formed in a plane mirror is always:

A.    Virtual, magnified, the same size

B.     Magnified, vertical and lateral inverted

C.     Diminished, real, lateral inverted 

D.    The same size as object, virtual and upright.

(xvi)         Which instrument is used to measure diameter of a constantan wire SWG 28?

A.    Vernier calipers

B.     Tape measure 

C. Micrometer screw gauge

D. Engineer calipers.

(xvii)      The property of material to return to its original size is called:

A.    Compression

B.     Elasticity

C.     Plasticity 

D. Elastic limit.

(xviii)    The magnetic needle, free to turn in a vertical plane, is suspended first at the earth’s South magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and horizontal are:

A.    0^o and 0^o

B.     70^o and 70^o

C.     0^o and 90^o 

D. 90^o and 0^o.

(xix)         The acceleration of a moving object may be found from:

A.    The area under its velocity – time graph

B.     The slope of the velocity – time graph

C.     The area under its distance – time graph

D.    The slope of the distance – time graph.

(xx)           The force of friction between layers of liquid is called:

A.    Surface tension

B.     Viscous force

C.     Compressional force

D.    Torsional force.

2.      Match the items in LIST A with the responses in LIST B by writing the letter of the corresponding response beside the item number in the answer sheet provided.

Answers:

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

(i)       Small deviation of measured value from true value is called  ____________________

(ii)    Charging without contact is called  ________________________________________

(iii)  Potential difference of a cell when is not connected in complete electric circuit is 

_________________________________________________________________

(iv)   A device used to detect the sign of charges in a body is  ______________________

(v)     The material placed between capacitor’s plates is called  ______________________

SECTION B: (50 Marks)

Answer all questions in this section

4.      (a) A body dipped in a liquid experiences an upthrust. Explain three factors on which the upthrust depends:

                                                                                                                        03 marks         

(b)    An object was totally immersed in a liquid contained in a vessel. The two opposite forces acting on the object are.

(c)    State how the forces in (b) above should be to make an object float:

                                                                                                                                                                02marks

4.    (d)   When a body is totally immersed in a liquid it weighs 3.2N. If the weight of liquid              displaced is 1.5N. Find the weight of a body in air.

                                                                                                                                                                03 marks

5.(a) Asha opens a bottle of perfume at the front of the room. After few minutes the smell           reaches the whole of the room. Explain why is it happening.  

     (b) Why shriveled prune placed in water swells?

     (c) Draw the magnetic field between two unlike magnetic poles that are close to one   another.

6.    (a)  State the principle of moments

       (b)  Give two ways that a mechanics can use to increase spanners turning effect.

 (c)  Draw the diagrams showing three different types of common equilibriums

                                                                                                          @02 marks

7.   (a)  Explain the meaning of linear momentum of a body 02 marks

(b)     How is a force is related to the linear momentum of a body? 

(c)     A body has mass of 50kg and a linear momentum of 3000kg ms^-1. Find its:

                (i)        Velocity of the body

(ii)       Kinetic energy of the body

8. (a) State the two common applications of an atmospheric pressure.

(i)              

(ii)            

02marks 

(b)   Briefly explain why a woman wearing shoes with pointed heels is more likely to     cause damage to a wooden floor than an elephant?

                                                                                                                                        03 marks

     (c) A rectangular tank measures 3m by 2m contains water to a height of 2m. Find

(i)        The pressure on the base of the tank.                                                      03 marks

(ii)      Thrust on the base of the tank.                                                    02 marks SECTION C: (20 Marks)

Answer all questions in this section

9.(a) Draw the pulley system with the velocity ratio of 4.

02 marks

(b)A machine of velocity ratio of 4 needs 2000J of energy to lift the load of 400N through a vertical distance of 2.5m.

(i)       Determine the work out put                                      02 marks

(ii)    Determine the efficiency of the machine

(b)               (iii)            Mechanical advantage of a machine              02 marks

(c)               A screw jack has a screw pitch of 4mm and the effort arm of 16cm. Determine the percentage efficiency of this screw jack, if it needs an effort of 50N to lift a load of 750N?

10.Three capacitors of 3 microfarad, 2 microfarad and 6 microfarad are connected in series when a battery of 30Volts is connected to this combination.

         (i)Draw the electric circuit of this combination.                                    04 marks

(a)               (ii) Find the charge in 3 microfarad                                 03 marks

(b)               An ohmic conductor has a voltage drop of 9 volts measured across it. The current in the conductor is 3A. What is the resistance?

FORM TWO PHYSICS EXAM SERIES 56  

FORM TWO PHYSICS EXAM SERIES 56  

FORM TWO PHYSICS EXAM SERIES 6  

FORM TWO PHYSICS EXAM SERIES 6  

X

VIEW MARKING SCHEME

Close Marking Scheme