Berita Harian : 2019-09-11

Fizik (kertas 2) : 32 : 6

Fizik (kertas 2)

BIL 834 Rabu, 11 September 2019 Fizik (Kertas 2) SKOR 6 Dari muka 5 → 6 7 Diagram 5.1(a) and Diagram 5.1(b) shows a metal coated polystyren­e ball was hanging between two metal plates that are connected to the Extra High Tension (EHT) power supply. 5.1(a) 5.1(b) Diagram 6.1 shows a simple electromag­net. 6.1 Rajah menunjukka­n satu elektromag­net ringkas. Rajah dan Rajah menunjukka­n sebiji bola polistiren­a yang bersalut logam digantung di antara dua plat logam yang disambungk­an pada bekalan Voltan Lampau Tinggi (VLT). P Iron nail Copper wire + Paku besi Wayar kuprum Nylon thread Battery v=2ms-1 v=1ms-1 Benang nilon Bateri Paper clips Klip kertas – Diagram 6.1 / 6.1 Rajah Metal coated polystyren­e ball ( a) What is the meaning of electromag­net? Bola polistiren­a bersalut logam Apakah maksud elektromag­net? Metal plate ___________________________________________________ [1 mark / 1 VLT VLT Plat logam markah] ( b) When the copper wire in Diagram 6.1 touches the positive terminal of the battery, 6.1 3 kv 1kv Apabila wayar kuprum dalam Rajah menyentuh terminal positif bateri, Diagram 5.1 (a )/ 5.1( a) Diagram 5.1(b )/ 5.1(b) Rajah Rajah (i) state what happens to the paper clips. nyatakan apa yang berlaku kepada klip kertas. A strong electric field between the two metal plates is produced when the switch is on. Satu medan elektrik yang kuat di antara dua plat logam dihasilkan apabila suis dihidupkan. ________________________________________________ [1 mark / 1 markah] ( a) What is meant by electric field? (ii) state the magnetic pole at P. Apakah maksud medan elektrik? nyatakan kutub magnet di P. ___________________________________________________ [1 mark / 1 ________________________________________________ [1 mark / 1 markah] markah] ( b) Based on Diagram 5.1(a) and 5.1(b), compare: 5.1(a) 5.1(b), ( c) The terminal of the battery is changed. What will happen to the magnetic pole at P? Berdasarka­n Rajah dan bandingkan: Terminal bateri diubah. Apakah yang berlaku kepada kekutuban magnet di P? (i) EHT voltage. ___________________________________________________ [1 mark / 1 voltan VLT. markah] ( d) Diagram 6.2 shows an electric bell. When the switch is on, the bell rings continuous­ly and produces a weak sound. 6.2 ________________________________________________ [1 mark / 1 markah] Rajah menunjukka­n sebuah loceng elektrik. Apabila suis dihidupkan, loceng berdering dan menghasilk­an bunyi yang lemah. (ii) the velocity of metal coated polystyren­e ball. Core halaju bola polistiren­a bersalut logam. Solenoid Teras ________________________________________________ [1 mark / 1 markah] Gong (iii) strength of electrical field. kekuatan medan elektrik. Switch Hammer Suis ________________________________________________ [1 mark / 1 Contact Pemukul markah] Sesentuh Soft iron armature Angker besi lembut ( c) (i) Relate the EHT voltage with the speed of oscillatio­n of pingpong ball. Hubung kaitkan voltan VLT dengan laju ayunan bola pingpong. Diagram 6.2 / 6.2 Rajah Based on Diagram 6.2, suggest the modificati­ons so that the bell produces louder sound. The modificati­ons are based on the following aspects: ________________________________________________ [1 mark / 1 markah] Berdasarka­n Rajah 6.2, cadangkan pengubahsu­aian supaya loceng itu menghasilk­an bunyi yang lebih kuat. Pengubahsu­aian adalah berdasarka­n aspek berikut: (ii) Relate the EHT voltage with the strength of electric field. Hubung kaitkan voltan VLT dengan kekuatan medan elektrik. (i) Diameter of wire of the solenoid Diameter dawai solenoid ________________________________________________ [1 mark / 1 markah] ________________________________________________ (iii) Deduce the relationsh­ip between the strength of electric field and the speed of oscillatio­n of pingpong ball. Reason / Sebab: ________________________________________________ [2 marks / 2 Deduksikan hubungan antara kekuatan medan elektrik dengan laju ayunan bola pingpong. markah] ________________________________________________ [1 mark / 1 (ii) Type of core markah] Jenis teras ( d) What will happen to the speed of oscillatio­n of pingpong ball if the metal plates are placed farther from each other? ________________________________________________ Apakah akan terjadi pada laju ayunan bola pingpong jika kedua-dua plat diletakkan lebih jauh antara satu sama lain? Reason / Sebab: ________________________________________________ [2 marks / 2 markah] ___________________________________________________ [1 mark / 1 markah] Lihat muka 7 →

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