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PHYSICAL SCIENCES P1 (PHYSICS)
COMMON TEST
MARKING GUIDELINE
JUNE 2019
NATIONAL SENIOR CERTIFICATE
GRADE 10
MARKS: 100
This marking guideline consists of 7 pages.
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Physical Sciences P1 2 June 2019 Common Test Grade 10 – Marking Guideline
QUESTION 1
1.1 D üü (2)
1.2 C üü (2)
1.3 C üü (2)
1.4 Aüü (2)
1.5 Düü (2)
1.6 Büü (2)
1.7 Cüü (2) [14]
QUESTION 2
2.1.1 No of complete waves passing a fixed point in one sec.üü (2)
2.1.2 f = 1
P T
= 1 0,06 P
= 16,67Hz OR
P
3 waves in 0,18 s P
x waves in 1 s P f = 16,67 s-1 P
(3)
2.1.3 Positive marking from 2.1.2
V = f x l P
= 16,67 x 0,21 P = 3,50 m.s-1 P
(3)
2.1.4 Halved P (1)
2.1.5 Negative Marking from 2.1.4
• Using v = f x l P • If frequency is doubled then wavelength must be halved • In order to keep speed constant P
P
(3)
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Grade 10 – Marking Guideline Physical Sciences P1 3 June 2019 Common Test
2.2.1 Sound with a frequency range of between 20 kHz to 100 kHz PP (2)
2.2.2 Part of the sound energy is absorbed by the sea bed. PP (2)
2.2.3
v
= Δx
P
Δt
1510 = Δx 1,5
Δx = 2265m = 2,27 km P
OR
(3)
v
1510
= Δx P
Δt
= Δx P
3 Dx = 4530
Depth = 4530 2
= 2265m = 2,27km P
2.2.4 Bat P OR Dolphin P (1) [20]
QUESTION 3
3.1 (ANY ONE) • Originate from accelerating electric charges P • Propagate as electric and magnetic fields that are perpendicular to each
other P • Can travel through a vacuum P • Have a speed of 3 x 108 m.s-1- P
(1)
3.2 • some of its behaviour is explained using a wave modelü
• while other aspects of its behaviour are explained using the particle model.P (2)
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P
Physical Sciences P1 4 June 2019 Common Test Grade 10 – Marking Guideline
3.3.1 E = hf P = (6,63 x 10-34)x(97,60x106) P = 6,47x10-26J P (3)
3.3.2 OPTION 1 c = f x l P
P 8 3 3x 10 = f x (1,50 x 10 ) P f = 200 000Hz
f = 0,20 MHz P ≠ 2 MHz (4)
OPTION 2
Speed = f x l P = 2 x 106 P x 1,5 x 103 P = 3 x 109m.s-1
≠ 3 x 108 m.s-1 P
3.3.3 Increases P (1)
3.3.4 Negative marking from 3.3.3
• E a 1 since (c) remains constant P l
• When l decreases then (E) must increase.P (2) [13]
QUESTION 4
4.1 A region in space where a magnet/ferromagnetic material will experience a force PP (2)
4.2.1 It is ferromagnetic P (1)
4.2.2 P (1)
4.2.3 • Repulsion P • The north pole of A faces the north pole of B P (2)
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Grade 10 – Marking Guideline
Physical Sciences P1 5 June 2019 Common Test
4.2.4 Positive marking from 4.2.1
• Shape P • Direction P (2)
4.3 Region surrounding the earth in which charged particles are trapped.
PP
(2)
4.4 Streams of charged particles are given off by solar flares. PP (2)
[12]
QUESTION 5
5.1.1 Certain materials become electrically charged after they come into contact with different materials. PP (2)
5.1.2 ● electrons move P
● from the glass ball onto the cloth P (2)
5.1.3 Positively charged P (1)
5.1.4 To the left P (1)
5.2.1 n = Q
P Qe
- 3 x 10-6 -1,6 x 10-19
P
= 1,88 x 10 13 P
(3)
5.2.2 The net charge on an isolated system remains constant PP (2)
5.2.3 OR
Q = Q1 + Q2 P Total charge = -1 µC P P
2 -3 µC P+Qy = -1 µC P
- 0,5 = - 3 + Qy
P 2
Qy = 2 µC P
Qy = + 2µC P (4)
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Physical Sciences P1 6 June 2019 Common Test Grade 10 – Marking Guideline
5.2.4 Gain P (1) [16]
QUESTION 6
6.1 As the number of resistors in series increases so will the current strength decrease PP (2)
6.2 Current strength P (1)
6.3 Electrical energy converted to light/heat energy PP (2)
[5]
QUESTION 7
7.1 emf P Since no current is flowing through the batteryP
(2)
7.2 8 P (1)
7.3.1 4V P (1)
7.3.2 4V P (1)
7.4 0,67 A P (1)
7.5 2C P (1)
7.6 1 = 1 + 1
Rp R1 R2 P
1 = 1 + 1 Rp 3 6 P
Rp = 2Ω P RT = 12Ω P
(4)
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Grade 10 – Marking Guideline Physical Sciences P1 7 June 2019 Common Test
7.7
V = W P
Q
20 = 4800 C P
Q = 240 C Q = IDt P 240 = 2 x Δt P Δt = 120 s
= 2 minutes P (5)
7.8 Apply Negative Marking
• Decreases P • total resistance will increase P • causing total current to decrease P • which causes V3 to decrease since V3 a IP (4)
[20]
TOTAL MARKS: 100
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