physics workshop 2017 - ks thong's blog · pdf filerajah 4.1 menunjukkan pesongan ammeter...

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PHYSICS Workshop

2017

Speaker : Thong KS

Success is depend on your

mind and your will.

You are the one, who

decide it. PROVE IT!!

thongks

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UCSI

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PART B Paper 3 Planning Experiment

Tips for Paper 3 No 1

1. Identify the variables from the text and Diagram (a) Manipulated variable (b) Responding variable (c) Fixed variable ( can be measured) (NOT TYPE OF SUBSTANCE)

(d) Observe the diagram measurement

(e) Identify the value in the table

(f) Tabulate data with symbol and unit.

(g) Plan your graph (unit and symbol)

(h) Determine the relationship from the graph

Tips for Paper 3 No 2

2. Read the question CAREFULLY

(a) Extrapolate the graph and write the value next to the highest and lowest point of the graph (b) Plot BIGGEST TRIANGLE and get the closest value with the units. (c) Determine the value correctly with 2 decimal places. (d) PRECAUTION WRITING

Observe the reading of the ammeter/ METER RULE perpendicular to the eyes to prevent parallax errors.

Turn off the circuit when measurement of current on ammeter is NOT TAKEN to prevent heating of wires and cause systematic errors.

(NO MORE WRITE) Repeat the experiment for several times/ 3 times and determine the average value to prevent systematic error.

3. PART B Planning Experiment (a) Identify the MV and RV from the diagram and questions. CIRCLE IT UP. (b) Identify the apparatus given on the question which relate to the PHYSICS CONCEPT of experiment. (c) Recall and relate the experiment which you had done before in school laboratory and identify the

relationship between the TWO variables. (d) DON’T QUOTE BACK the questions variables. It will make the whole planning experiment get

maximum 2 marks.

Paper 2 Part B

1. Definition – don’t state the formula of the define word - Write the definition in statement from the formula

2. Comparison questions – must use back the same diagram to compare in physics

term comparison. Quote back the Diagram number, and compare with statement

according to the marks provision. 3. Explanation on aspects given. Must quote back the aspect given, don’t divert the

statement by explaning other statement of your ways.

4. Explain the characteristics of the statement given follow ( 1 marks) with

explanation of the benefit and advantages of the characteristics stated. (1 marks)

5. More explanation are better, usually TWO are more than enough.

Part C

1. Usually calculation, and definition. Please state formula, working and final results with

minimum 2 decimal places and correct units. 2. Explanation of physics concepts, usually test your understanding of physics formula

relationships.

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3. Study specification on the aspects given and evaluate the pictures given to extract the answer

from the information given. Quote the information of point of answer and elaborate the

statement of characterics with physics concept explanation.

4. Try to give TWO explanation of each characterics in a statement. (4 points with 4 explanation) –

8 marks

5. Final 2 marks is the explanation of the BEST suitability and CHOOSE the BEST of the 4

or 5 given examples. 6. This characteristics and explanation can states in a table form. (THE BEST EVER

ESSAY for 10 marks) 7. Choose the best essay than you can get the MOST marks.

8. Essay in Part B and Part C is usually ONE form 4 and ONE form 5. So DON’T SPOT QUESTION. Study all the physics concept.

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Planning Experiment Based on the information and observation: (a) State one suitable inference. [1 mark ] (b) State one suitable hypothesis. [1 mark] (c) With the use of apparatus such as beaker, thermometer and other apparatus, describe one experiment to investigate the hypothesis stated in 3(b). In your description, state clearly the following: (i) The aim of the experiment. (ii) The variables in the experiment. (iii) The list of apparatus and materials. (iv) The arrangement of the apparatus. (v) The procedure of the experiment which include one method of controlling the manipulated variable and one method of measuring the responding variable. (vi) The way to tabulate the data. (vii) The way to analyse the data. [10 marks]

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USCI Workshop 2017

1. Rajah 3.1 menunjukkan seorang pemuda duduk bersendirian di atas sebuah

bangku yang berada di atas tanah yang lembut, dia mendapati kaki bangku itu

tidak tenggelam ke dalam tanah.

Diagram 3.1 shows a teenager sat alone on top a benches on a soft soil, he noticed

the leg of the benches never sink into the soil.

Rajah 3.2 menunjukkan kaki bangku tenggelam ke dalam tanah apabila seorang

pemuda lain duduk di atas bangku itu bersamanya.

Diagram 3.2 shows the leg of the benches sank into the soil when another teenager

sat on the benches together.

Rajah 3.1 Rajah 3.2

Dengan menggunakan radas seperti pemberat , plastisin dan radas lain terangkan satu

eksperimen untuk menyiasat hipotesis yang dinyatakan di 3(b).

Using the apparatus as load, plasticine and other apparatus, explain an experiment to

investigate the hypothesis stated in 3 (b)

2. Rajah 4.1 menunjukkan pesongan ammeter adalah kecil apabila suis dihidupkan dan

reostat dilaraskan pada satu kedudukan. Bunyi loceng yang kedengaran adalah

perlahan.

Diagram 4.1 shows the small deflection of ammeter when switch is turn on and

rheostat set at one position. The bell ring slowly.

Rajah 4.2 menunjukkan pesongan jarum ammeter adalah lebih besar apabila suis

dihidupkan dan reostat dilaraskan pada kedudukan yang berbeza. Bunyi loceng yang

kedengaran adalah lebih kuat.

Diagram 4.2 shows the bigger deflection of ammeter when switch is turn on and

rheostat set at another position. The bell ring louder.

thongks

Sticky Note

MV= mass of load RV = depth of sinking of plasticine CV = area cross sectional

thongks

Sticky Note

MV = number of current RV = number of pins attracts CV= strength of magnet( number of magnet)


Rajah 4.1 Rajah 4.2

(a) Dengan menggunakan radas seperti bateri, teras besi lembut,dawai kuprum bertebat, dawai penyambung dan radas lain, terangkan satu eksperimen

untuk menyiasat hipotesis yang dinyatakan di 4(b).

Using the apparatus such as battery, soft iron core, insulated copper wire,

connecting wire and other apparatus, explain an experiment to investigate the hypothesis

stated in 4 (b)

3.

Diagram 3 shows two similar coffee maker A and B, containing different amount of

coffee on similar hot plates stove. The coffee in both coffee makers are heated by

turning on the power supply of the hot plate. After few minutes, it was observed that

the coffee in coffee maker B is hotter than the coffee in coffee maker A.

Rajah 3 menunjukkan dua pembancuh kopi serupa A dan B, mengandungi jumlah

kopi yang berbeza di atas dapur plat panas yang serupa. Kopi di dalam kedua-

dua pembancuh kopi dipanaskan dengan menghidupkan bekalan kuasa plat panas.

Selepas beberapa minit, didapati kopi dalam pembancuh kopi B adalah lebih panas

daripada kopi dalam pembancuh kopi A.

(c) With the use of apparatus such as beaker, thermometer and other apparatus,

describe one experiment to investigate the hypothesis stated in 3(b).

Dengan menggunakan radas seperti bikar, termometer dan lain-lain radas, terangkan

satu eksperimen untuk menyiasat hipotesis yang dinyatakan di 3(b).

thongks

Sticky Note

MV= mass of water RV = temperature of water CV= power supply, voltage/ heat


4.

5.

With the use of apparatus such as an ammeter, constantan wire and other apparatus, describe one

experiment to investigate the hypothesis stated in 4 (b).

Essay

6. a) Diagram 12.1 shows the building structure of construction of a hydro power generating plant.

Rajah 12.1 menunjukkan struktur binaan sebuah loji penjana kuasa hidro.

Based on the Diagram 12.1, explain how the efficiency can be increased in the long distance

transmission of electricity by using alternating-current.Berdasarkan Rajah 12.1, terangkan bagaimana

kecekapan dapat ditingkatkan dalam penghantaran tenaga elektrik jarak jauh dengan menggunakan arus

ulangalik. [4 marks]

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Sticky Note

MV = heat, power supply/ voltage RV = temperature CV = mass of liquid

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Sticky Note

MV = length of wire RV = resistance (R= V/I) CV= current

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Sticky Note

- alternate current can step up its voltage using transformer - voltage for long distance transmission should start with higher value to reduce the current in power line - low current when high voltage -Power loss due to resistance in power line can be reduce


6(b) Rajah 10.4 menunjukkan struktur sebuah alat pengering rambut yang bertanda 240V, 1100 W.

Alat ini tidak berfungsi dengan cekap.

Diagram 10. 4 shows a structure of hair dryer with sign 240 V, 1100 W. The gadget not function

effectively.

Rajah 10.4

Anda dikehendaki untuk mengubahsuai alat pengering rambut di atas untuk menjadi lebih cekap lagi.

Dalam penerangan anda berikan penekanan kepada aspek-aspek berikut:

You are ask to modify the hair dryer to be more efficient. In your discussion, the aspect to be highlights

(i) Bahan elemen pemanas/ heating element

(ii) Ketebalan dawai elemen pemanas/ the thickness of heating element

(iii) Kuasa kipas yang digunakan/ power of fan

(iv) Kadar fius yang digunakan/ rate of fuse uses

(v) Bilangan kipas / number of fans [10 markah]

7. Diagram 10.6 shows a water heater used to boil water.

Rajah 10.6 menunjukkan satu pemanas rendam digunakan untuk mendidihkan

air.

Using appropriate physics concepts, suggest and explain how to build a water heater which can boil a

larger quantity of water faster , more efficient, and more safety based on the following aspects;

Dengan menggunakan konsep-konsep Fizik yang sesuai, cadang dan terangkan bagaimana untuk

membina satu pemanas rendam yang boleh mendidihkan kuantiti air yang lebih besar dengan lebih

cepat, lebih cekap dan lebih selamat , berdasarkan aspek-aspek berikut ;

(i) type of material used for the heating element of the water heater

Jenis bahan yang digunakan untuk elemen pemanas bagi pemanas rendam

(ii) shape of the heating element of the water heater

bentuk elemen pemanas bagi pemanas rendam

(iii) melting point of the heating element of the water heater

takat lebur elemen pemanas bagi pemanas rendam

(iv) rate of rusting of the heating element of the water heater

kadar pengaratan elemen pemanas bagi pemanas rendam

(v) additional component used for safety when the water boil

Komponen tambahan yang digunakan untuk keselamatan bila air mendidih [10 marks] [10 markah]

thongks

Sticky Note

1. nicrom- high melting point , prevent it from melting at high temperature and never corrode with water 2. coil and long- more resistance, more heat release to boil large quantity of water in short time 3. high melting point more than 100 C- to enable water boiling more 100 C and turns into water vapour and achieve the boiling of water 4. low rate of rusting of heating element- element wont rust easy or fast when expose to water and never contaminant the water and turn to poison 5. circuit breaker and lighting protector- at high voltage cut off the supply and prevent electricuted

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Sticky Note

Aspect Explanation Use (tungsten) High melting point, it never corrode easily, heat up in shorter time, more efficient Nichrome , power inversely proportional to time Coiled longer wire, increase the resistance, more heat produce and boil larger quantity, high melting point not easy to melt under high temperature, boil water faster and less heat disspated Low rate of rusting Does not get rust easily, it wont poison the drinking water use termostat When temperature reach 100oC, the water heater will thermistor automatically turned off, prevent lost of water through evaporation with added safety features

thongks

Sticky Note

aspect explanation nicrom wire high resistance withstand more heat with high melting point and high resistivity low thickness high resistance and less current flow and heat up easily, effective heating high fan power more blowing power with high velocity and can heat up hair faster, effective heating high fuse rate 5A current use is 4.58 A, higher a bit then current flows more number of fans produce more air and hot air to spread faster and more heating ability

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Sticky Note


8. Diagram 11.4 shows Ahmad is repairing a complex electronic circuit. Ahmad need a lens that can

magnified the small object while working on the repairing job.

Rajah 11.4 menunjukkan Ahmad sedang membaiki litar elektronik yang rumit. Ahmad memerlukan

bantuan sebuah kanta yang boleh digunakan untuk membesarkan objek yang kecil semasa melakukan

kerja pembaikian.

You are required to investigate the characteristics of lens as shown in Table 11. Explain the suitability

of each characteristic of the lens. Give reasons for your choice.

Anda dikehendaki mengkaji ciri-ciri kanta seperti yang ditunjukkan dalam Jadual 11. Terangkan

kesesuaian setiap ciri kanta. Beri sebab bagi pilihan anda.

9.

thongks

Sticky Note

-short and round = to protect the head if there is any impact and aerofoil shape to increase lifting force when cycling -material interior shell is polystryrene =to prevent head injuries, reduce impulsive force and light in weight -wide strip = hold the helmet and head tightly, big area, low pressure -air hole present = for air flow and cooling effect on cyclist.high velocity, low pressure -the best is N helmet with Polystyrene material interior shell, short and round front end, air hole present and wide strap

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Sticky Note

characteristics explanation 1. convex lense converge light and magnified image and help in observing small object while repairing the circuit 2. thick lense high power and magnification increase with reducing the focal length to magnified the complex circuit 3. u< f virtual image, upright and magnified so that the image of the circuit forms on the same side of the obejct like magnifying glass 4. plastic lighter and strong so that easy to carry and hold to magnified object 5. M circuit converge light, high magnification, virtual image and strong and light plastic

physics workshop 2017 - ks thong's blog · pdf filerajah 4.1 menunjukkan pesongan ammeter...

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