34. Diagram 32 shows a coil which carries a current. Iron filings are sprinkled onto the cardboard to trace the pattern of the magnetic field.

Rajah 32 menunjukkan sebuah gegelung yang membawa arus. Serbuk besi ditaburkan keatas kadbod untuk memetakan corak medan magnet.

Diagram 32 Rajah 32

Which of the following is the correct pattern of the magnetic field?Antara yang berikut yang manakah merupakan corak medan magnet yang betul?

A.

B.

C.

D.

CurrentArus

Coil carries a currentGegelung berarus

35. A student is trying to determine the direction of the magnetic field produced by a current in a straight wire. Which of the following method is correct?

Seorang pelajar sedang mencuba untuk mencari medan megnet yang terhasil oleh arus dalam satu dawai lurus. Antara kaedah berikut, yang manakah benar?

36. Diagram 29 shows a current flowing in a conductor which is placed in a magnetic field.Which direction does a force act on the conductor?

Rajah 29 menunjukkan konduktor berarus yang diletakkan dalam satu medan magnet. Manakah arah daya yang terhasil pada konduktor itu?

Diagram 29Rajah 29

37 The diagram 24 shows a bar magnet moving towards a solenoid.

Rajah 24 menunjukkan magnet bar digerakkan ke arah solenoid.

Diagram24Rajah 24

Which of these actions will not increase the deflection of the galvanometer pointer?Tindakan manakah yang tidak akan menambah pesongan jarum galvanometer?

A Reversing the polarity of the magnet Menukar kutub magnetB Increasing the number of coils in the solenoid Menambah lilitan solenoidC increasing the speed of the bar magnet Menambah halaju magnet barD increasing the number of magnets used Menambah bilangan magnet

38 Diagram 27 shows a multi-tap transformer.

Rajah 27 menunjukkan sebuah transformer multi-salur.

DIAGRAM 27 / RAJAH 27

At which terminals should a 12 V bulb be connected such that it lights up with normal brightness?

galvanometer

U S

Bar magnet

Direction of movement

50 turns / lilitan

50 turns / lilitan

50 turns / lilitan

50 turns / lilitan

240 V3000 turnslilitan

T

S

R

Q

P

Pada terminal-terminal manakah sebuah mentol 12 V patut disambung supaya mentol itu menyala dengan kecerahan normal?

A P and QB P and RC P and SD P and T

39 Which of the following is preferred in the transmission of electricity over long distances?

Antara berikut yang manakah lebih sesuai dalam penghantaran bekalan elektrik melalui jarak jauh?

Type of current used Voltage of the transmission cables

Jenis arus yang digunakan Voltan dalam kabel penghantaran

A Direct current / Arus terus Low voltage / Voltan rendahB Direct current / Arus terus High voltage / Voltan tinggiC Alternating current / Arus ulangalik Low voltage / Voltan rendahD Alternating current / Arus ulangalik High voltage / Voltan tinggi

skema 34. A35. A36. A37. A38. C39. D