Phy p2 Trialspm Terengganu 08(Ans)

8/14/2019 Phy p2 Trialspm Terengganu 08(Ans)

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PAPER 2

SECTION A

No 1 Answer

a) 1M Bourdon Gauge

b) 1M Pressurec) 1M Increase

d) 1M Pressure Law

Total 4M

Q 2 / S 2

(a) 1 Distance between two consecutive / successive point in

phase in phase / crests / trough.

(b)

1

2

Substitute v and in v = f correctly.

f =

v

=m

sm

2

21

= 1 Hz Answer with correct

unit.

(c) 1

2

Frequency increases.

Frequency inversely proportional to the wavelength //

Wavelength decreases.

Tot/Jum : 8

No 3

a) 1M Elastic Potential Energy Kinetic Energy

b) 1M Nearer

c) i) 1M

1M ( 10 ) ( 20 x 10-2 )

1.0 J

answer with unit

ii) 1M

1M mv

2= 1.0 J

v = 10 m/s

answer with unit

Total 6M


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Question 4

Section Mark Answer Notes

4 (a) 1 +

(b) (i) 1

1

Alpha deflects to negatively plates

Gamma no deflection

(b) (ii) 1

1

Alpha positively charge

Gamma neutral

(c) 1

1

120g 60g 30g 15g

7.5g

120 - 7.5 @ 112.5 g

Total 7

Question 5

Section Marks Answer Note

(a)(i) 1 Pencil in Diagram 6.2 more bending/vice versa

(ii) 1 Density of seawater is higher/ vice versa

(iii) 1 The higher the density the greater the bending

(b) 1 The size of the pencil in the water is greater

(c) 1 Diffraction

(d) 1 velocity

(e) 2

Total 8 marks


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Question 6


(a)

1

State the meaning of induced current

correctly

The current that induced by electromagnetic

inductions when the circuit is complete//Thecurrent that can be produced without any

electrical supply/source

(b)(i)

1 Label the polarity of each solenoid

correctly

1 X: N

2 Y: S

(b)(ii)

1

1

Label the direction of motion of each

magnet correctly

Diagram 6.1 bar magnet towards the solenoid

Diagram 6.2 bar magnet away from the

solenoid

(c)(i)

1

1

State the effect of the polarity at the end of

the solenoid on the motion of the bar

magnet correctly

1 When the bar magnet is pushed towards

the solenoid, the end of the solenoid

facing the bar magnet has the same

polarity as the bar magnet

2 When the bar magnet is pulled away from

solenoid, the end of the solenoid facing

the bar magnet has the opposite polarity

as the bar magnet

(c)(ii) 1Name the law correctlyLenzs Law

(d) 1

Correct suggestion

Increase the speed of bar magnet/increase the

number of turns of the solenoid/use a stronger

magnet

Total 8

Question 7


7 (a) 1 Pascals Principle

(b) 1

1

When the small piston is pressed down, the

pressure is exerted on the liquid and

transmits uniformly to the large piston

The force is produced and pushes the chair

up

(c) 1 Some of the force is used to compress air


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bubbles

(d) 1

1

=

F = 100 N

(e) 1

1

1

1

Increase the cross sectional area of the big

piston @ Decrease the size of the smallpiston

To increase the force multiplier

@ Use stronger alloy for liquid

To withstand higher pressure without

cracking

Enlarge the size of the seat

To accommodate the larger bodies of adults

@ Strengtened the sealt

To withstand the heavier adults witout

damage

Total 10

Question 8


(a)

1State the meaning correctly

When 240 V potential difference is supplied,

1.2 kW power is produced

(b)(i) 1

1

Correct substitution

1.2 or 1200

240 240

Answer with the correct unit.

5A

(b)(ii) 1

1

Correct substitution

240 or 12005 240

Answer with the correct unit.

48

(c)(i)

1

1

Give two suggestions correctly

W and Y

Give two reasons correctly

High boiling point not boil at high


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temperature

High resistivity // produced more heat

(c)(ii) 1

1

Give two suggestions correctly

W and Z

Give the reason correctly

The fuse rating just bigger the current through

the kettle

(c)(iii) 1

1

Give the correct choice

W

Give the reason correctly

High boiling point , High resistivity and use

8Afuse

Total 12

SECTION B

Bhgn. Markah Jawapan Catatan

Soalan 9

(a)(i)

(ii)

(iii)

1

1

11

1

1

Gravitational force

Weight lost in Diagram 9.1(b) > Diagram 9.1(c) // vise versa

Apparent weight in Diagram 9.1(c) > Diagram 9.1(b) // vise versaDensity of water > density of oil

The greater the density of liquid, the greater the weight lost / less

apparent weight

Uptrust / buoyant force

(b) 1

1

1

1

Name two correct force (uptrust and weight)

Uptrust small because small volume // vise versa

Block sink because weight > uptrust

Sheet float because weiht = uptrust


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(c)

1,2

3,4

5,67,8

9,10

modification

explaination

Strong material

Can withstand great

force

Low density material

Lightweight

Two stage plimsoll line

Save in fresh and salt

water

Big size

Can place more goods

Aerodynamic shape

Reduce water friction

Accept any reasonable

modification

QUESTION 10

Section Marks Answer Note

(a) 1 Unstable nucleus

(b)(i) 1

1

Exponential graph

The time taken for the activity to become half of its

initial value is constant

(ii) 1

1

The time taken for the activity of P to be half its initial

value is constant //5 hrs

The time taken for the activity of Q to be half its

initial value is constant //100 s

(iii) 1 Half-life

(c) 1

1

1

1

1

Put the radioactive source opposite the detector

Detector is connected to the thickness indicator

Detector detect the reading of the changes in counts

Thickness is measured with the thickness indicator

If the reading of the detector is less than the specified

value, the thickness of the paper is too tick/ vice versa


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Max 4

(d) 1,2

3,4

5,6

7,8

9,10

Uses thick lead box

Radioactive rays cannot pass through

Packed into concrete drum and buried undergroundPrevent the radioactive waste discharged to the

environment

Use forceps/ robotic hand

Avoid direct touching

Use siren

Faster warning when leakage

Wearing photographic filmsDetect the exposure radiations

Accept other ways and

reasons

Total 20

SECTION C


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PART Mrk ANSWERS NOTE

Question 11

(a) 1 The ability of the material to return to their original shapeand size when the force exerted on it is removed.

(b)

1

1

1

1

1

- There are two types of force

- Attraction and repulsive force between the particles

of the solid.

- When the solid is stretched, the molecules

displaced away from each other

- Attractive forces are acting to oppose the stretching

- When the solid is compressed, the molecules

displaced closer to each other

- Repulsive forces are acting to oppose the

compression

(c) 1

1

1

1

1

1

1

1

1

1

suitability

-small

diameter

-enough

space for thespring to beinstalled

-more than

1000N

-can support

motorcylist

up to 100kg

-higher

spring

constant

-small

compression

of the spring

-small natural

frequency

-to reducebumping

Choice and

reasons

D , small

diameter ,

highest elastic

limit ,highest

spring

constant and

small natural

frequency


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Q12/S12

Sect. Mark

(a)(i)

(a)(ii)

(a)(iii)

1

Max 4

10

1 State the meaning of ideal transformer correctlyTransformer which produce output power equal to input power //

Transformer which has 100% efficiency.

1 State the correct current flow through primary coil.

When a.c. voltage is supplied to primary coil, alternating current will flow.

2 State the correct magnetised of iron core.

The soft iron core is magnetized.

3 State the correct change of magnetic flux.

The magnet produced varies in magnitude and direction.

4 State the correct change of magnetic flux in secondary coil.

This causes a changing magnetic flux pass through the secondary coil.

5 State the correct result of induced e.m.f.in secondary coil.An induced e.m.f. across the secondary coil is produced

State the correct characteristics and reasons

1 Step-down transformer

5 Capableof reducing potential difference / voltage

2 Ratio 20 : 1 // 240 : 12 // Np = 4000 turns and Ns = 200 turns

6 Reduce potential difference 240 V to 12 V

3 Using four diodes

7 Full wave rectification.

4 Using a capacitor.

8 To smooth out output current// produce output of steady direct current.

9 The most suitable circuit is S10 Step-down transformer, Ratio is 20 : 1, Using four diodes and using a capacitor.

(b)(i)

(b)(ii)

5 1 Output voltage of trans former = 12 V

2 Input power = IpVp = 240 x 0.5 // 120 W

3 Output power = 12 x 4.0 // 24 + 24 // 48 W

4 Efficiency = %000

48

5 = 40 %

Total : 20


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Phy p2 Trialspm Terengganu 08(Ans)