70839880 Physics p3 Experiment

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Complied by :-EN ADNAN SHAMSUDIN GURU CEMERLANG FIZIK

Dengan Kerjasama :- PANITIA FIZIK

SMK SULTAN ISMAIL JOHOR BAHRU.

MODUL LAT HAN BERSEPADU

Physics Paper 3 - Section B

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PHYSICS 4531/3SPM 2 011

P AP ER 3Marking Scheme Included

Ph y s ics Pap er 3 - S ecti o n B

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C H APTER 2

1. Diagram 3 shows two catapults A and B made from same catapult rubber. Difference forces are applied on the catapults.

(vi) Describe how to control the manipulated variables and how to measure the responding variables.

(vii) The way to tabulate the data.(viii) The way to analyse the data

[10 marks]

CHAPTER 3

3. A man who is fishing, pulled out a fish out of the water as shown in Diagram 3.1. It becom es more difficult to pull out the fish out of the water and the rod is getting bender in Diagram 3.2.

Base on the information and observation above: (a) State one suitable inference.

(b) State one suitable hypothesis.[1 mark]

[1 mark](c) With the use of apparatus such as spring, retort stands

and other apparatus, describe an experiment frameworkto investigate the hypothesis stated in 3(b). (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.(vi) Describe how to control the manipulated variables

and how to measure the responding variables.(vii) The way to tabulate the data. (viii) The way to analyse the data

Diagram 3.1 Diagram 3.2

Based on the information and your observation above: (a) State one suitable inference.(b) State one suitable hypothesis.(c) With the use of apparatus such as measuring cylinder,

spring balance, metal rod and other apparatus, describean experiment framework to investigate the hypothesisstated in 3(b)

[10 marks]

2. A boy pushes the boxes along a level walkway as shown in Diagram 3.1. The boy experiences that the boxes on trolley move slowly. When the boy removes two of the boxes as shown in Diagram 4.2, he experiences that the trolley move faster than before although the same force was applied, 8 N.

4. Diagram 3.1 shows a diver is diving into the sea. Diagram3.2 shows a diver is diving into the swimming pool. They are at the same depth but the diver in Diagram 3.1 feel that his ear was sick.

Based on the information and obsevation above : (a) State one suitable inference.

(b) State one suitable hypothesis.[1 mark]

[1 mark]


Based on the observation above and your knowledge of pressure in liquid;(a) State one suitable inference.

(c) With the use of apparatus such as a trolley, ticker timer, ticker tape, elastic cord and other apparatus, describe anexperiment framework to investigate the hypothesis stated in 4(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.

(b) State one suitable hypothesis.(c) With the use of apparatus such as thistle funnel, meter

ruler and others, describe an experiment framework to investigate the hypothesis stated in 4(b)

5. Diagram 3.1 shows an aluminium foil which has been shaped into a boat and put into a water container. Diagram 3.2 shows the same piece of aluminium foil that has been crumpled and put into the same water container.

Based on the above information and observation:(a) State one suitable inference. (b) State one suitable hypothesis.(c) With the use of apparatus such as a measuring cylinder, a

metal rod, spring balance and other apparatus, describean experiment to investigate the hypothesis stated in 3(b).

C H APTER 4

6. Diagram 3.1 shows a half glass of hot coffee that is left for ten minutes. Diagram 3.2 shows a full glass of similar hot coffee that is left for the same time. It is notice that the hot coffee in Diagram 3.1 cools down faster than Diagram 3.2.

Based on the information and observation: (a) State one suitable inference(b) State one suitable hypothesis(c) With the use of apparatus such as a Bourdon gauge and

the other apparatus, describe an experiment to investigate the hypothesis stated in 3(b).

8. Before going to Johor Bahru, Afiff measures the air pressure of the tyres of his car, as shown in Diagram 3. He noticed that the air pressure one of the tyres is 200 kPa. At Johor Bahru, Afiff measured the air pressure. He found that the air pressure in tyre has increased to 240 kPa. Afiff also found that the tyre become hot after he arrived at Johor Bahru. However the size of the tyre remains the same.


Based on the information and observation above: (a) State one suitable inference.(b) State one suitable hypothesis.(c) With the use of apparatus such as immersion heater,

beaker and other apparatus, describe an experiment framework to investigate the hypothesis stated in 3(b).

7. Diagram 3.1 shows a worker pushing down on the piston of a clogged bicycle pump. Diagram 3.2 shows the same worker finding it harder to push the piston further down.

Based on the information and observation: (a) State one suitable inference(b) State one suitable hypothesis.(c) With the use of apparatus such as Bourdon gauge, a

round bottom flask and other apparatus, describe oneexperiment to investigate the hypothesis stated inQuestion 3(b).

9. Diagram 3.1 shows an inverted beaker contains an airtrapped is converted and immersed in the water. Diagram 3.2 shows the volume of air trapped in the beaker decreasedwhen the beaker is pushed down in the water.

Based on your observation on the volume of air trapped in the beaker;(a) State one suitable inference,(b) State one appropriate hypothesis that could be

investigated,(c ) With use of apparatus such as a syringe , thick rubber

tube and other apparatus, describe an experiment to investigate the hypothesis stated in 3(b)

10. Diagram 3.1 shows two pot, X and Y, with X containing more water than Y. Both the pot are heated. After a few minutes it was observed that the water in pot Y is hotter than the waterin pot X.

Diagram 3.1Based on the information and observation: (a) State one suitable inference(b) State one suitable hypothesis.(c) With the use of apparatus such as beaker, thermometer

immersion heater and other apparatus, describe one experiment to investigate the hypothesis stated inQuestion 3(b).

11. Diagram 3.1 shows a boy accidentally spilt a few drops of hot noodle soup onto his hand and felt slight pain. Later on, he accidentally spilt the whole bowl of hot noodle soup onto

Diagram 3.1 Diagram 3.2Based on the information and observation: (a) State one suitable inference.

(b) State one hypothesis that could be investigated

(c) With the use of apparatus such as power supply, beaker, immersion heater and other apparatus, describe an experiment to investigate the hypothesis stated in Question 3(b).

CHAPTER 5

12. Diagram 3.1 shows a student using a convex lens to form a sharp image of a lamp at the ceiling. Diagram 3.2 shows the student using another convex lens to form a sharp image of the lamp.


Observe the thickness of the lens and the distance from the lens to the image in both situations.Based on the observation:(a) State one suitable inference.(b) State one hypothesis that could be investigated.(c) With the use of apparatus such as convex lenses, a screen and

other apparatus, describe an experiment toinvestigate the hypothesis stated in 3(b).

13. Diagram 3.1 shows a line under a glass block. Diagram 3.2 shows an identical line under a Perspex block of the same size. An observer noticed that the image of the line formed in the glass block is nearer to the surface of the block.

Based on the information and observation: (a) State one suitable inference,(b) State one hypothesis that could be investigated.(c) With the use of apparatus such as a tall beaker, water and

other apparatus and material, describe one experiment to investigate the hypothesis stated in 3(b).

CHAPTER 6

14. Diagram 4.1 shows a boy standing beside the road and a motorcycle moving towards the boy from a far distance. Diagram 4.2 shows that the boy has to close his ears when the motorcycle has come nearer to him.

Diagram 4.1

Diagram 4.2

Based on the information and observation: (a) State one suitable inference.(b) State one hypothesis that could be investigated.(c) With the use of apparatus shown in Diagram 4.3 and

other apparatus, describe an experiment to investigate the hypothesis stated in 4(b).

Based on the information and the observation above: (a) State one suitable inference(b) State one suitable hypothesis.(c) With the use of apparatus such as ripple tank,

stroboscope and other suitable apparatus, describe anexperiment framework to investigate the hypothesis stated in 4(b).

16. Diagram 4 shows a man testing a newly bought audio system in a mini theatre by changing his seating position. Loud sound can only be obtained at some seating positions with a certain distance from the loudspeaker.

15. Diagram 4.1 and diagram 4.2 shows the interferance patterns formed by two continuous coherent water waves with different distance between two spherical dippers.

Based on the observation above and your knowledge on waves phenomena;(a) State one suitable inference.(b) State one hypothesis that could be investigated. (c) With the use of apparatus such as an audio generator, loudspeakers and other apparatus, describe an experimental framework to investigate the hypothesis stated in 3(b).

17. Diagram 4 shows two audio technicians is going to set a close hall so that the audient can enjoy the sound perform by a singer clearly. When the workers bring the two speakers closely to another, the distance beside two chairs must be set further apart so that the sound effect is good enough. The works can be illustrated as shown in the Diagram 4.

(c) With the use of apparatus such as d.c. motor (12V), slotted weight and others apparatus, describe an experiment to investigate the hypothesis stated in 4(b).

19. Diagram 4.1 and Diagram 4.2 show an identical bulbs connected to the conductor wires of identical length but of different thickness. When the power supply is switched on, the bulbs lighted with different brightness.

Based on the situation above,(a) State one suitable inference.(b) State one hypothesis that could be investigated.(c) With the use of apparatus such loudspeakers, audio

signal generator and others to set your apparatus,describe an experiment framework to investigate thehypothesis stated in 3(b).

C H APTER 7

18. Diagram 4.1 shows a worker lifting a load using a reel and a pulley. The worker notices that it takes a longer time to lift a heavier load to the top of the building.

(a) State one suitable inference(b) State one hypothesis that could investigated.(c) With the use of apparatus such as a dry cells, constantan

wire and other apparatus, describe one experiment toinvestigate the hypothesis stated in 4(b).

20. Diagram 4.1 shows a lamp which lights up with normal brightness when the dimmer knob is set at its minimum value. Diagram 4.2 shows the lamp dimmer when the dimmer knob is set at its maximum value.

Diagram 4.1Based on the situation above,(a) State one suitable inference.

(b) State one appropriate hypothesis that could be investigated.

an experiment to investigate the hypothesis stated in3(b).

22. Diagram 4.1 and Diagram 4.2 show two night market stalls which are fixed with two identical bulbs that are connected to two identical car batteries 12 V with different length of connecting wires. Both bulbs bright up with different brightness.


Based on the information and observation: (a) State one suitable inference(b) State one suitable hypothesis(c) With the use of apparatus such as constantan wire ,

voltmeter and the other apparatus, describe anexperiment to investigate the hypothesis stated in 3(b).

21. Diagram 4.1 shows Aminah ironing her school uniform.After the iron is switched on for a while, there are still wrinkles on the uniform. Diagram 4.2 shows that thewrinkles are gone when the temperature control knob asshown in figure 4.3 on the iron is turned.

Based on the information and observation: (a) State one suitable inference.(b) State one hypothesis that could be investigated(c) With the use of apparatus such as dry cells, constantan

wire, and other apparatus, describe an experiment toinvestigate the hypothesis stated in 4(b).

23. Diagram 4.1 and 4.2 shows the electric circuit consists with an electric bells, switch and battery. When the switch is closed, it is observes that the bell in Diagram 4.2 rings louder than the bell in Diagram 4.1. Both electric bells in each diagram are same.

Based on the observation above and your knowledge of electromagnet;(a) State one suitable inference. (b) State one suitable hypothesis.(c) With the use of apparatus such as solenoid, paper clips

and othersdescribe an experiment framework to investigate the hypothesis stated in 4(b)

Based on the observation on Diagram 4.1, Diagram 4.2 and Diagram 4.3 and using your knowledge of the effect of current on heating:(a) State one suitable inference(b) State one suitable hypothesis(c) With the use of apparatus such as beaker, an ammeter,

an immersion heater and the other apparatus, describe

24. Diagram 4.1 and 4.2 show the electric bell which is connected to the similar batteries.

26. Diagram 4.1 shows a cross-section of a bicycle dynamo which has a magnet and coil of insulated copper wire. The output of the dynamo is connected to a bicycle lamp. The lamp will light up when the magnet is rotated by turning the wheel. The light gets brighter when the wheel turns faster.

When the switch is on, the bell in figure 4.2 ring loudly than the bell in figure 4.1.Based on your observation(a) State one suitable inference(b) State one appropriate hypothesis that could be

investigated(c ) With use of apparatus such as a insulated copper wire ,

small iron pins and other apparatus, describe anexperiment to investigate the hypothesis stated in 3(b)

25. Diagram 4.1 shows an electromagnetic lifting machine used to lift scrap metal. Diagram 4.2 shows the observation of the machine when the current flows through the machine is increased.

Based on the above information and observation: (a) State one suitable inference.(b) State one hypothesis that could be investigated.(c) With the use of apparatus such as coil of copper wire,

galvanometer, crocodile clips and other apparatus,describe an experiment to investigate thehypothesis stated in 4(b).

Base on the information and observation above: (a) State one suitable inference.(b) State one suitable hypothesis.(c) With the use of apparatus such as copper wire, soft iron

core and other apparatus describe an experimentframework to investigate the hypothesis stated in 4(b).

MARKING SCHEME PHYSICS PAPER 3-SECTION B

CHAPTER 2

Questions No. 1(a) The length of catapult rubber depends on the force(b) The bigger the force, the longer the extension of the catapult

rubber(c) To investigate the relationship between the force and extension

of a spring- Manipulated variable : Force- Responding variable : Extension- Constant variable : Length of the spring//diameter of the

spring//type of spring- Spring, retort stand, ruler, slotted weight- State a functionable arrangement of the apparatus- Measure the initial length of the spring, l1- Put one slotted mass, 20 g/m1 at the end of the spring.- Measure the length of the spring, l2- Calculate extension of the spring, x = l2 – l1- Repeat the experiment for the mass 40g, 60g, 80g, 100g.- Tabulate the data

(vii)

CHAPTER 3

Questions No. 3(a) The buoyant force can be determined by finding the weight of

water displaced(b) The more the rod is immersed, the lower the reading on the

spring balance(c) (i) To investigate the relationship between weight of water

displaced and the buoyant force(ii) Manipulated : length of rod below the liquid level

Responding : weight/ loss in weightConstant : Density of liquid

(iii) Beaker, rod, spring balance, metre rule(iv)

- Plot graph of extension /length of spring against force/mass

Questions No. 2(a) Acceleration is influenced by the mass(b) When the mass increased, the acceleration will be decreased. (c) (i) To investigate the relationship between the acceleration

and the mass.(ii) Manipulated variable : mass

Responding variable : acceleration Constant : Force applied

(iii) 5 Trolleys, ticker timer, ticker tape, a rubber band, a wooden runway, 12 V a.c power supply, ruler

(iv)

(v) A rod which is 10 cm long is marked at intervals of 1 cm and suspended from the hook of a spring balance.The experiment is started by lowering the rod to depth of5.0 cm and reading on the spring balance, W is recorded. The length of rod below the liquid level is measured and the reading on the spring balance is recorded.The experiment is repeated by lowering the rod to different depths, i.e,H = 6.0 cm, 7.0 cm, 8.0 cm and 9.0 cm

(vi) Tabulate the data :

(v) The ticker-timer is switched on and a trolley (of 1 kg) is pulled using a rubber band. The extension of the rubber band is ensured to be of the same lengthAcceleration of the trolley is calculated using the ticker- tape. a = ( v-u ) / tProcedure 2 and Procedure 3 are repeated using 2, 3, 4 and 5 trolleys

(vi)

RV : pressure //different levelCV : Depth

(iii) Tall beaker, small thistle funnel, flexible tube, manometer, meter rule, retort stand, liquids

(iv)

(viii) Analysis of data: Draw a graph of weight, W against height, h

(v) Insert the thistle funnel vertically down to the bottom of the beaker of liquid density of 1.2 gcm-3

Measure the different level in manometer, l. Repeat the experiment 4 time using another liquid with different density such as 1.5 gcm-3. 2.0 gcm-3,3.0 gcm-3 3.5 gcm-3 and 4.0 gcm-3

(vi) Record the data

(vii) Plot graph pressure against density.

Questions No. 5(a) The different shape of platisicine , give different buoyant force(b) When the surface area increase, the buoyant force increase(c) Aim of experiment : To determine the buoyant force acting on

an object in different states of flotation(i) Manipulated variable:Height of the iron bar(ii) Responding variable:Reading of the spring balance(iii) Fixed/ constant variables:Volume of the water(iv) List of apparatus and materials Measuring cylinder, a

metal rod, spring balance and metre rule, beaker, water, retord stand

(v) Arrangement of apparatus

CHAPTER 4

Questions No. 6

(a) The change in temperature of water depends on its volume /mass

(b) When the volume / mass increases, change in temperature decreases

(c) (i) To investigate the relationship between the volume /mass and temperature

(ii) Manipulated variable : volume / mass of water Responding variable : change in temperature Fixed variable : heating time

(iii) Power supply, immersion heater, connecting wires, beaker, stirrer, thermometer, water, measuring cylinder / balance , heater and stop watch

(iv)

(v) 20 cm3//g of water is heated by an immersion heater for 5 minutes.Final temperature is recorded after 5 minutes.Repeat step 1 and 2 using 40 cm3, 60 cm3, 80 cm3 and100 cm3 of water

(vi)

(vi) Procedure- The meter rule was clipped to the retort stand

beside of the iron bar.- The height of the iron bar is set at h = 20.0 cm.- The iron bar is immersed into the water. The

reading of the spring balance is recorded. 4. Step 2 and 3 is repeated for the height, h= 25.0 cm,30.0cm, 35.0 cm and 40.0 cm.

(vii) Tabulation of data

(vii)

(a)

(b)

The force // weight affects the volume of the gasThe pressure affects the volume of the gasWhen the pressure of a fixed mass of gas decreases , the volume of the gas increases//The bigger the acting force thesmaller the volume of the gas // The bigger the acting force thesmaller the volume of the gas // The greater the weight thesmaller the volume of the gas.

(c) (i) To investigate the relationship the pressure and thevolume of the gas

(ii) MV : Pressure of gas , V (v) - Read thermometer when the temperature reachRV : Volume of gas , P 30°C.CV: Temperature and mass of the gas. - At the same time, read the bourdon gauge to get

(iii) 100 cm3 glass syringe , rubber tube , Bourdon gauge , the reading of gas pressure.

Questions No. 7(iv)

(iv)load, triple beam balance , retort stand. - Stir the water continuously, and repeat the

experiment when the temperature reach 40°C,50°C, 60°C and 70°C.

(vi) Tabulate the data

(v) Weight is added onto the piston until the Bourdon gauge shows a reading 10 PaRecord the enclosed volume, V , of the syringeRepeat the experiment by increasing the pressure to15 Pa , 20 Pa, 25 Pa and 30 Pa.

(vi) Tabulate the data.

(vii) Plot the graph pressure against temperature

(vii) Plot graph V against P.

Questions No. 8(a) Pressure depends on temperature(b) The higher the temperature, the higher the pressure(c) (i) To investigate the relationship between the air pressure

and its temperature(ii) Manipulated : temperature

Responding : pressureFixed : volume / mass of gas

(iii) Round-bottomed flask, glass tube, bourdon gauge, thermometer, rubber tube, retort stand, tripod stand, Bunsen burner, stirrer, beaker, wire gauze, water, water bath.

Questions No. 9(a) Pressure depends on volume// Volume influences pressur(b) When the volume decrease , the pressure increase ,(c) To investigate the relationship between volume and pressure

(i) Manipulated : volume(ii) Responding : pressure(iii) Fixed : mass of gas // temperature(iv) Syringe, clip , thick rubber tube, bourdon gauge .

(v) The piston of the 100 cm-3 syringe is adjusted until the volume of air in the syringe at atmospheric pressure.The other end of the rubber tube is connected tppo bourdon gauge and the pressure of the air in the syringe is readon the gauge.The piston of the syringe is pushed in until the enclosed volume is 98 cm3 / V1.

The pressure on the Bourdon gauge is recorded.The steps is repeated for an enclosed volume of 96 cm3/V2,94 cm3/V3, 92cm3/V4, 90 cm3/V5

Questions No. 10(a) The mass // volume affects the rise in temperature //

temperature(b) The greater the mass // volume, the smaller the rise in

temperature // temperature(c) (i) To investigate the relationship between the mass and rise

in temperature (of water)(ii) Manipulated variable : Mass

Responding variable : Increase in temperatureFixed variable : Heat supplied // Time of heating // Power of the heater

(iii) Beaker, water, thermometer, immersion heater,stopwatch, balance for measuring mass

(iv) Draws a labeled and functional diagram of the set up of the apparatus

(v) Put a mass of 100 g of water in a beakerSwitch on the heater for 5 minutes and record the temperature riseRepeat the experiment with 150 g, 200 g, 250 g and, 300g of water.


(v) The 20 g of water is filled in the beaker.The initial temperature, 0, of water is recorded. The heater is switched on until the water boiled.The time taken for the water is observed and recorded/ The heat is calculated.Repeat with masses of boiling water 40 g, 60 g, 80 g and100 g.

(vi) Tabulate the table

(vii) The graph of temperature rise against mass is drawn

Questions No. 11(a) The heat/ time taken of the water depends on its mass/volume(b) The greater the mass/volume, the time taken increase(c) (i) To investigate the relationship between the time taken

and mass/volume(ii) Manipulated variable : mass/volume

Responding variable : Time takenConstant variable : Initial temperature/specific heat

capacity/ changes in temperature(iii) Power supply, thermometer, beaker, immersion heater,

stirrer(iv)

(vii) The graph f agianst d is plotted

Questions No. 13(a) Apparent depth depends on the density/type of block/material(b) When the density (of material) increase, the apparent depth

decrease/depth of image(c) (i) To investigate the relationship between density and

apparent depth/depth of the image(ii) manipulated V : density// mass of salt

responding V : apparent depth/depth of imagefixed V : real depth , volume water(ignore the change

of volume of water + salt )(iii) Tall Beaker/cylinder, pin, retort stand, water, salt, meter

rule, triple beam balance(iv)

CHAPTER 6Questions No. 14(a) The loudness of the sound depends on the distance (between

the source and the observer(b) The smaller the distance (between the source and the observer),

the louder the sound(c) (i) To investigate the relationship between the loudness of a

sound and the distance (between the source and the observer)

(ii) Manipulated variable : distance, dResponding variable : loudness of sound (amplitude,a)(Note: Constant variable can be ignored)

(iii) Audio signal generator, loudspeaker, cathode ray oscilloscope (CRO), microphone, meter rule / measuring tape

(iv)

(v) Fill the beaker with ( V = 1000 cm3 ) water.Put the 20 g of salt into the beaker and stir . Place a pin O into the water.Adjust the position of the pin I (at the retort stand) by observing above the beaker until it appears in line with the imageMeasure the apparent depth of the straight line,d.Repeat the experiment with( different four densities of liquids) by mixing the mass of salt , m = 30g , 40g, 50g, and 60g .

(vi)

(vii)

(v) Two spherical dippers are attached to the waterThe distance between spherical dippers on the screen are adjusted to a = 5.0cmThe distance between 2 constructive /destructive interference on the scree n , x is measured with the ruler andRepeat the previous step by increasing the distancebetween 2 spherical recorded. dippers. a =6cm,7cm,8cm and 9cm.

(vi)

(v) Setting up of apparatus is as shown in diagram above.Switch on the audio generator.A student walked slowly along a parallel straight line at a distance, D = 5.0 m from the loudspeakers using a metre rule /measuring tape.The distance, x between two successive positions of loud sounds is measured using a metre rule.The experiment is repeated for D = 1.0m, 1.5 m, 2.0 m,2.5 m and 3.0m.

(iii) Tabulate the data

(vii) (vii) Plot the graph x against D

Questions No. 16(a) The distance between two successive loud, x sound depends on

the distance from the loudspeakers, D(b) The distance between two loud sounds, x increases as the

distance of separation of two sources, a increases./ the longer the distance between two loud sounds, x ,the longer the distance from the loudspeakers, D

(c) (i) To investigate the relationship between distance, x anddistance, D

(ii) Manipulated : Distance between the observer and loudspeakers, DResponding : Distance between two successive positionsof loud sounds, x.

Fixed : Distance between the two loudspeaker, a, frequency of audio generator

(iii) Audio signal generator, two identical loudspeakers, connecting wires and metre ruler

(iv)

Questions No. 17(a) The distance between 2 loud speaker affect the distance

between 2 loud or soft sound(b) When the distance between two coherent sources of sound is

increase, the distance between two consecutive constructive or destructive interference is decrease.

(c) (i) To investigate the relationship between two coherent sources and the distance between two consecutive constructive and destructive interference.

(ii) Manipulated : Distance between two coherent sources, aResponding : Distance between two consecutive

constructive or destructive Interference,xConstant : Distance between the source and the screen.

(iii) Loud speaker, audio signal/frequency generator,connection wire, power supply, measuring tape.

(iv)

(v) By using a metre rule the distance between the listener from the loudspeaker is measured= DThe audio-frequency generator is switched on.Use a distance between two loud speaker, a= 1.0m.The listener is requested to walk in a straight path from left to right.The distance between two successive loud regions is measured by a metre rule = xThe experiment is repeated using a distance between two loud speaker a=1.5m, 2.0m, 2.5m and 3.0m.


(v) Measure the length of a constantan wire with a ruler , l =10 cmThe switch is on and adjust rheostat until ammeter reading shows current , I = 0.5 ARecord the potential difference from voltmeter , V Calculate the resistance , R = V / IRepeat the experiment by using constantan wire of l =15.0 cm, 20 cm , 25 cm , 30 cm and 35.0 cm.


(vii) Plot the graph R against l

Questions No. 21(a) The heating effect of a conductor is affected by magnitude of

the current.(b) The larger the current, the higher the temperature of the water

which is being heated(c) (i) To investigate the effect of current on heating

(ii) MV : current ,IRV : temperature , θCV : volume of water

(iii) Beaker, ammeter, immersion heater, thermometer, connecting wire, rheostat and stop watch

(iv) Draws a labeled and functional diagram of the set up of the apparatus.

(v) Pour 200cm3 of water into the beaker and measure itstemperature.Switch on the circuit and adjust the rheostat until the reading of ammeter is 1.0 A.The stop watch is started.The final temperature is recorded after 2 minutes.Step repeated by adjusting the rheostat so that the ammeter readings are 2.0 A, 3.0 A, 4.0 A and 5.0 A.


- The experiment is repeated for the height, h= 80cm, 60 cm, 40 cm and 20 cm. Tabulation of data

(vi)

(vii) Analysis of data: Draw a graph of V against h

70839880 Physics p3 Experiment

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