Modul_K3_Fizik_SPM_2020_JPN_Sabah_SECTION_A_QUESTION_2_ANSWERS

SKEMA SOALAN 2

Question Mark Scheme Sub Total
Mark Mark

1(a)(i) T2 is directly proportional to l. 1
T2 adalah berkadar terus dengan l.

(ii) - Show the vertical line corresponding to the l = 0.50 m. 1
- Identify the value of T2 = 2.9 s2 13
- Correct answer with unit 1
T = 1.70 s

(b) - Draw a sufficiently large triangle (minimum 4 x 4) 1
- Correct substitution (follow candidate’s triangle) 13
Example:
!.#$% ( (!) 1

%.*$% (+)

- Correct answer with unit

m = 5.83 s2 m-1

(a)(ii)

2.9 s2

(b)

(c) - Correct substitution

= ( . )

= ( . ) 13
2

= . ( . ) 1

- Correct answer with units 1
g = 9.82 m s–2

(d) (i) The position of eye must be perpendicular to the scale of the stopwatch to avoid parallax 1
error.
Kedudukan mata mestilah serenjang kepada skala jam randik untuk mengelakkan ralat
paralaks.

(ii) Repeat the measurement and calculate the average reading to obtain accurate 1 2
measurement. 1
Ulang pengiraan dan hitung purata bacaan untuk mendapatkan pengiraan yang tepat. 3
3
2(a)(i) a is directly proportional to h.
a adalah berkadar terus dengan h.

(ii) - Show the extrapolation on the graph 1
- Show the vertical line corresponding to the h = 0.3 m. 1
- Identify the value of a = 1.50 m s-2 1

(iii) - Draw a sufficiently large triangle (minimum 4 x 4) 1
- Correct substitution (follow candidate’s triangle) 1
Example:
,.#$% (+ ("!) 1

%.!$% (+)

- Correct answer with unit

m = 5.0 s-2

3

(b) - Correct substitution

= 1
2
=
1
- Correct answer with units

g = 10 m s–2

(c) - Correct substitution

= × 1
2
= × .
1
- Correct answer with units

- g = 0.75 m s–2

(d) The position of eye must be perpendicular to the scale of the metre rule to avoid parallax error. 1
Kedudukan mata mestilah serenjang kepada skala pembaris meter untuk mengelakkan ralat
paralaks.

3(a)(i) Increases 1
(ii) Bertambah
12
(b)(i) - Show the extrapolation on the graph 1
- Identify the value of l = 10 cm 1
1
- Draw a sufficiently large triangle (minimum 4 x 4)
- Correct substitution (follow candidate’s triangle) 3
1
Example:
--.#$,% (.+) 1
2
*%$% (/)
1
- Correct answer with unit

k = 0.208 cm g-1

(ii) - Correct substitution

- Correct answer with S.I. unit

= 0.4808 kg m–1

4

(b)(i)

10 cm (a)(ii)

(c) - Correct substitution

= +
"
1
" = . + .
3
= . 1
"
- Correct answer with units 1

k’ = 0.2404 kg m–1

(d) The position of eye must be perpendicular to the scale of the metre rule to avoid parallax error. 1
Kedudukan mata mestilah serenjang kepada skala pembaris meter untuk mengelakkan ralat
paralaks.

4(a)(i) W is directly proportional to V. 1
W adalah berkadar terus dengan V.
12
(ii) - Show the vertical line corresponding to the V = 45 cm3. 1
- Identify the value of W = 0.45 N 1
1
(b) - Draw a sufficiently large triangle (minimum 4 x 4)
- Correct substitution (follow candidate’s triangle) 5
Example:

%.#$% (0) 3
1
#%$% (.+#)

- Correct answer with unit

k = 0.01 N cm-3

0.65 N

0.45 N

(d)

(a)(ii (b)
)

(c) - Correct substitution 1
2
=


= ( . # )
#

- Correct answer with units 1
ρ = 1 g cm–3
13
(d) - Show the extrapolation on the graph 1
- Show the vertical line corresponding to the V = 65 cm3. 1
- State the value with the correct unit
W0 = 0.65 N

(e) The position of eye must be perpendicular to the scale of the spring balance to avoid parallax 1
error.
Kedudukan mata mestilah serenjang kepada skala neraca spring untuk mengelakkan ralat
paralaks.

6

5(a)(i) P decreases as θ decreases 1
(ii) P berkurang apabila θ berkurang
(b) 1
- Show the extrapolation of the graph 12
- State the value within acceptable range
1
θ = - 273 °C 1

- Draw a sufficiently large triangle (minimum 4 x 4) 3
- Correct substitution (follow candidate’s triangle) 1

Example: 1
1%$-% (234)
1
#%$($-%%) (°6) 12

- Correct answer with unit 1
2
m = 0.28 kPa °C-1
1
(c)(i) – Correct answer with units
(ii) T = 303 K
(iii)
– Show the vertical line corresponding to the θ = 30 °C
– State the value within acceptable range

P = 84 kPa

– Correct substitution
= 29.85 ('%(&')
– Correct answer with units

R = 8.28 x 103 Pa K –1

-
7

(d) The position of eye must be perpendicular to the scale of the Bourdon gauge / Pressure gauge 1
/ thermometer to avoid parallax error.
Kedudukan mata mestilah serenjang kepada skala Tolok Bourdon / Tolok Tekanan /
Termometer untuk mengelakkan ralat paralaks.

6(a)(i) sin i is directly proportional to sin r. 1
(ii) sin i is adalah berkadar terus dengan sin r.
1
(b) - Show the extrapolation of the graph 14
- Show the vertical line corresponding to the sin r = 0.65 1
- Identify the value of sin i = 0.76 1
- Correct answer
1
i = 49.5 1
- Draw a sufficiently large triangle (minimum 4 x 4)
- Correct substitution (follow candidate’s triangle) 3

Example: 1
%.7$%
%.*$%
- Correct answer with unit, n = 1.17

(c) – Correct substitution #

= , . ×
,
. × #
. = 13

,

– Correct answer with units 2
v2 = 2.56 x 108 m s –1

- 1
(d) The position of eye must be perpendicular to the scale of the protractor to avoid parallax error.

Kedudukan mata mestilah serenjang kepada skala protaktor untuk mengelakkan ralat
paralaks.

8

7 (a) (i) IC is directly proportional with IB 1
IC berkadar terus dengan IB 1
(b) 1
(c) (ii) IC = 500 mA 1
Extrapolation line / Garisan ekstrapolasi 1
Interpolation line / Garisan intrapolasi 1

(iii) Show triangle minimum 4 x 4 1
Tunjukkan segitiga minimum 4 x 4
Correct substitution: Penggantian yang betul: 1
1
500 ´10-3 1
10.0 ´10-3 1
Correct answer: Jawapan betul: 1
5 12
(i) Correct calculation: Pengiraan yang betul:
= (5 + 1) (25 x10-3) 1
Correct answer: Jawapan betul: 1
1.50 x 10-1 A 1
(ii) Correct calculation: Pengiraan yang betul: 1
= 5(25.0 x 10-3 / 1.50 x 10-1) 1
Correct answer: Jawapan betul: 1
0.83A
The eyes should perpendicular to the scale reading of miliammeter. 1
Mata mesti berserenjang dengan skala miliammeter. 1

8. (a) (i) R is directly proportional to L 9
R berkadar langsung dengan L

(ii) Extrapolate the graph / Ekstrapolasi graf

Show on the graph when / Tunjukkan pada graf apabila R= 2.75 Ω,

L = 75 cm
(iii) Show triangle minimum 4 x 4 / Tunjukkan segitiga minimum 4 x 4

Correct substitution: Penggantian yang betul:
2.5 – 0.0 Ω
70.0 – 0.0 cm

Correct answer: Jawapan betul:
0.0357 Ω cm-1
(b) (i) Use R/L = 0.0357 Ω cm-1

= 0.79 (0.046)2 (0.0357) 1
1
= 0.0000597 Ω cm 1
(ii) Decreases 1
12
Berkurang 1
(c) The position of the eye is perpendicular to the scale of metre rule 1
1
Kedudukan mata mesti berserenjang dengan skala pembaris meter 1
1
9. (a) (i) R increases.
R bertambah 1
1
(ii) R = 5 Ω, 1 = 6.6 A-1
I 1
1
I = 1 = 0.15 A
6.6 A-1 1
1
(show in the graph) 1
12
(tunjukkan di graf) 10

(b) (i) Show triangle minimum 4 x 4

Tunjukkan segitiga minimum 4 x 4

Correct substitution: Penggantian yang betul:

m = 13 - (- 5)W

12 A-1

= 1.5AW /1.5V

(ii)

R = E - r
I

R = E( 1 ) - r
I

Y = mX + c

\ E = m = 1.5V

(iii)

R = E( 1 ) - r
I

Y = mX + c

c = -5, c = -r

\r = 5W

(c) The eyes should perpendicular to the scale reading of miliammeter.
Mata mesti berserenjang dengan skala miliammeter.

10 (a) (i) directly proportional 1
berkadar terus
1
(ii) Extrapolation line / Garisan ekstrapolasi 1
Interpolation line / Garisan intrapolasi 1
Ib = 0.20 x 10-6 A 1

(b) (i) Show triangle minimum 4 x 4 1
Tunjukkan segitiga minimum 4 x 4
Correct substitution: Penggantian yang betul: 1
(37.5 - 10.0) x 10-3 A
(0.30 - 0.03) x 10-6 A 1
Correct answer: Jawapan betul: 1
1.02 x 105
1
(ii) Ic/Ib = Gradient of graph / kecerunan graf
= 1.02 x 105 1
1
(c) Correct calculation: Pengiraan yang betul: 12
Ie = Ib + Ic 1
= (0.30 x 10-6) + (37.5 x 10-3)
Correct answer: Jawapan betul: 1
0.0375A 1
1
(d) The eyes should perpendicular to the scale reading of ammeter. 1
Mata mesti berserenjang dengan skala ammeter.
1
11. (a) (i) V decrease
(b) V berkurang 1
(c) 1
(ii) Extrapolation line / Garisan ekstrapolasi
V = 1.0V 1

(iii) E.m.f / D.g.e 1
(i) Show triangle minimum 4 x 4 11

Tunjukkan segitiga minimum 4 x 4
Correct substitution: Penggantian yang betul:

m = 0.48-1.0
0.77-0

= - 0.675 Ω
(ii) r = 0.675 Ω
(i) Correct calculation: Pengiraan yang betul:

E = V + Ir
1.0= v+0.8(0.675)

v= 0.46 V

(ii) Correct calculation: Pengiraan yang betul: 1
R= V
I 1
R= 0.48 12
0.8
= 0.575Ω 1

12. (a) (i) directly proportional 1
1
(b) berkadar terus 1
(c) 1
(c) Extrapolation line / Garisan ekstrapolasi 1

(ii) 1/x = 1/1.25 = 0.8 1
1
Interpolation line / Garisan intrapolasi 1
1
f = 500 Hz 1
1
(iii) Show triangle minimum 4 x 4 12

Tunjukkan segitiga minimum 4 x 4

Correct substitution: Penggantian yang betul:

1000 - 0 * Correct substitution (follow candidate’s triangle)

1.6 – 0

= 625 Hz m// ms-1

Correct calculation: Pengiraan yang betul:

v = fx = k
D D

= 625
1.8

= 347.22 m s-1

v increases
v meningkat
The position of the eye is perpendicular to the scale of metre rule
Kedudukan mata mesti berserenjang dengan skala pembaris meter

12

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