Page 371 - MODUL SPEKTRUM FIZIK SPM

(ii) Efficiency
Kecekapan
V I
= s s  100 %  80 %
V p I p Mark 1 : Substitution 2

60I
s  100 %  80 %
240 ) 5 . 0 (
I s = 1.6 A Mark 2 : Answer with correct unit
(c)(i) Soft iron Mark 1
Concentrates / converges magnetic field Mark 2
// Easy to magnetise / demagnetise 2
Besi lembut
Menumpu medan magnet //
mudah dimagnetkan / dinyahmagnet
(ii) Copper Mark 1
Lower resistance // Reduce heat loss Kuprum Mark 2 2
Rintangan rendah // kurang kehilangan haba
10
8(a) When a potential difference / voltage of -
240V is supplied, the kettle consumes 1.2 kJ
of energy per second 1
Apabila beza keupayaan / voltan 240
dibekalkan, cerek menggunakan 1.2 kJ
tenaga setiap saat
(b)(i) 1200

240 Mark 1 : substitution 2
5 A Mark 2 : answer with correct unit
(ii) 240

5 Mark 1 : substitution 2
48  Mark 2 : answer with correct unit
(c)(i) W and Y. Mark 1
High melting point / Not melt easily. 2
W dan Y. Mark 2
Takat lebur tinggi / tidak mudah lebur
(ii) W and Y. Mark 1
High resistivity / Produce more heat.
W dan Y. Mark 2 2
Rintangan tinggi / menghasilkan lebih
banyak haba.
(iii) W and X. Mark 1
Current in kettle = 8.33 A // Fuse > 8.33 A 2
W dan X. Mark 2
Arus dalam cerek = 8.33 A // Fius > 8.33 A
(iv) W - 1
12

Sektor Pembelajaran, Jabatan Pendidikan Negeri Sabah | 2020 370