🌊PAPER 21-Qns

THE PRESIDENT’S OFFICE

REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

WAKULIMA SECONDARY SCHOOL

FORM TWO MIDTERM TEST

PHYSICS

TIME: 2:30 Hours 031/1 Friday, 24th march 2023

INSTRUCTIONS:

1. Answer ALL questions from all sections

2. All diagrams must be drawn with pencil

3. Question 1 and 2 must be answered in the spaces provided

SECTION A (15 marks)

1. Choose the most correct answer and write its letter in the space provided for each question.

(i) The following instruments are used for measuring length, which one is not?

1. A ruler

2. Eureka can

3. A micrometer screw gauge

4. A Vernier Callipers

(ii) A ferry boat floats in seawater because its density is

1. Greater than that of water

2. Smaller than that of water

3. The same as its weight

4. Greater than its weight

(iii) An electrostatic machine which produces an unlimited supply of sparks by induction is called

1. A gold leaf electroscope

2. An electrophorus

3. A generator

4. A speedometer

(iv) The process of assigning numbers to observations or events is called

1. Measurement

2. Counting

3. Calibration

4. Induction

(v) Current electricity is measured in;

1. Amperes

2. Coulombs

3. Farad

4. Volts

(vi) The reading of the burette is 14.7cm³. 50 pins each of volume 0.1cm³ are added into the water in the burette. The new reading is;

1. 19.7cm³

2. 14.8cm³

3. 14.7cm³

4. 9.7cm³

(vii) When a body floats in liquid;

1. Its weight is less than upthrust

2. Its weight is greater than upthrust

3. Its weight is equal to upthrust

4. Its volume is equal to volume of displaced liquid

(viii) A mass of 1 kilogram is pulled by the gravitational force towards the Centre of the earth by a force of

1. 1 Newton

2. 10 Newtons

3. 100 Newtons

4. 1000 Newtons

(ix) The shortest distance which can be measured by a meter rule is;

1. 0.1mm

2. 1.0mm

3. 10mm

4. 100m

(x) The closed path through which the electrons flow is called:

1. Electric current

2. Conducting wire

3. Electric circuit

4. Ammeter.

Qns	i	ii	iii	iv	v	vi	vii	viii	ix	x
Ans

2. Match the following items by writing the letter of the correct meaning from list B below the roman number of the item in list A in the table below:

LIST A	LIST B
Electrophoru Lightning Farad Dielectric Radar	A huge discharge of static electric charges between two clouds or a cloud and the ground The zigzag path taken by electrons It can be used as a match box in the laboratory. Is the capacitance when a charge of 1 Coulomb is stored in a capacitor of 1Volts potential difference across its plates. The material placed between the plates of a parallel plate capacitor

LIST A	i	ii	iii	iv	v
LIST B

SECTION B (70 marks)

Answer ALL questions from this section

3. A form one student was arguing that, if you drop a dry wood into water obviously you find it floating.

1. With their directions state all forces acting to the wood while submerged

2. Give two conditions that enable the wood to float in water

4. (a)Give three applications of density in our daily life

(b) A form one student performed an experiment in the laboratory to determine the density of a special stone provided by his teacher. He used an electronic balance to weigh the mass of the stone, which was found to be 178 g. The stone was then completely immersed in water of initial volume 60 cm³ contained in the measuring cylinder. If the final volume was 80cm³,what density of the stone the student got?

5. (a) What features the school laboratory has that distinguish it from other buildings. (Give four features)

(b) Draw a well labelled diagram of micrometer screw gauge

6. (a) Draw a well labelled diagram of hydrometer that measures relative density of range 0.7 to 1.2

(b) Nyinangera said “I found out that the speed of light in space is 3 x 10⁸m/s.” This means that light can travel a distance of 3 x 10⁸m in a time interval of just 1 second. Identify and write down from what Nyinangera said, all the fundamental physical quantities and their respective SI units.

7. (a) In his presentation, a form two student made this statement, “The ruler may become negatively charged when rubbed with the fabric, because the ruler loses protons to the fabric.” Is the statement correct? Explain

(b) You are provided with two capacitors of capacitance C1 = 3µF and C2 = 6µF. Show that their total capacitance when they are connected in parallel is greater than total capacitance when they are connected in series

8. (a) Physics is one of the subjects taught in Tanzania secondary schools. Give four advantages as to why do we study physics

(b) A tank 2m tall and base area 2.5m is filled to the brim with a liquid which exerts a force of 40,000N at the bottom. Calculate the density of the liquid.

9. (a) Explain why Petrol road tankers usually have a length of metal chain hanging down touching the ground.

(b) Two forces act on a trolley as shown below; Find: the acceleration of the trolley

SECTION C (15 marks)

10. (a) Study the circuit below and then answer the questions that follow after it.

Will each of the bulbs A and B be ON or OFF if ;

1. Switch S1 only is opened?

2. Switch S2 only is opened?

3. If both switches are closed

(b) What amount of energy can be stored when charging a capacitor of capacitance 4µF connected in series with 12V of power supply.

(c) The weight of the body measured when in air is 54N and 30N when the body is totally immersed in water. What is the upthrust acting on the body?

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