FIZIK F5 ELEKTRIK

Diagram shows a charged conducting sphere is oscillates between two plates which are connected to an Extra High Tension (EHT) power supply.

Rajah menunjukkan satu sfera konduktor bercas berayun di antara dua plat yang telah disambung ke satu bekalan voltan lampau tinggi (VLT).

The frequency of the oscillation of the sphere will increase if

Frekuensi ayunan bebola akan bertambah jika

• The distance between the plates is increased.

  Jarak antara dua plat ditambah.

• The size of the sphere is increased.

  Saiz sfera ditambah.

• The length of the thread is increased.

  Panjang benang ditambah.

• The voltage of the EHT is increased.

  Voltan VLT ditambah.

Diagram shows a candle flame placed between two metal plates, P and Q.

Rajah menunjukkan nyalaan lilin diletakkan antara dua plat logam, P dan Q.

What happens to the candle flame when E.H.T is switch on?

Apakah berlaku kepada nyalaan lilin apabila V.L.T dihidupkan?

• Moved to the Q plate only

  Bergerak ke plate Q sahaja

• Moved to the P plate only

  Bergerak sebelah plat P sahaja

• Split and more spread to Q plate

  Berpecah dan tersebar lebih ke plat Q

• Split and more spread to P plate

  Berpecah dan tersebar lebih ke plat P

Diagram 22.1 shows the electric field pattern between two parallel charged metal plates.

Diagram 22.2 shows the pattern when the two plates are moved from each other.

Rajah 22.1 menunjukkan corak medan elektrik di antara dua plat logam selari yang bercas.

Rajah 22.2 menunjukkan corak medan bila kedua plat logam digerakkan menjauhi antara satu sama lain.

What conclusion can be made from the above observation?

Apakah kesimpulan yang boleh dibuat dari pemerhatian di atas?

• The pattern of the electric field is uniform

  Corak medan elektrik adalah seragam

• The direction of the electric field is always from left to right

  Arah medan elektrik adalah sentiasa dari kiri ke kanan

• The electric field is stronger when the plates are oppositely charged

  Medan elektrik bertambah kuat bila plat adalah bercas berlawanan

• When the distance between the plates increases, the strength of the electric field decreases

  Apabila jarak di antara plat bertambah, kekuatan medan elektrik berkurangan

Potential difference between two points is defined as

Beza keupayaan di antara dua titik ditakrifkan sebagai

• Current flows is 1 A when 1 V is applied across two points

  Arus 1 A mengalir apabila 1 V dikenakan merentasi dua titik

• Energy released between two points when 1 C charge is flow

  Tenaga dibebaskan di antara dua titik apabila cas 1 C mengalir

• Power released between two points when 1 C charge is flow

  Kuasa dibebaskan di antara dua titik apabila cas 1 C mengalir

• Energy released between two points when 1 A current flow through two points

  Tenaga dibebaskan di antara dua titik apabila arus 1 A mengalir di antara dua titik

A light bulb is labelled 240 V, 0.25 A. What is the quantity of charge that flows through the bulb when it lights up at normal brightness for 600 s?

Sebuah mentol lampu dilabel 240 V, 0.25 A. Berapakah kuantiti cas yang mengalir melalui mentol itu apabila mentol itu menyala pada kecerahan normal selama 600 s?

• 150 C

• 360 C

• 840 C

• 2400 C

Diagram shows a graph of potential difference against current flow through a conductor.

Rajah menunjukkan graf beza keupayaan melawan arus yang mengalir melalui suatu konduktor.

Gradient of graph to represent a

Kecerunan graf mewakili

• Electromotive force

  Daya gerak elektrik

• Energy

  Tenaga

• Resistance

  Rintangan

• Power

  Kuasa

Diagram shows a squirrel perched on a high voltage cable.

Gambarajah menunjukkan seekor tupai bertenggek pada kabel bervoltan tinggi.

The squirrel does not experience an electric shock because

Tupai itu tidak mengalami renjatan elektrik kerana

• the potential difference between the legs is high

  beza keupayaan di antara kaki adalah tinggi

• the resistance of the cable between the legs is very high

  rintangan kabel di antara kakinya sangat tinggi

• the body of the squirrel has a low resistance

  badan tupai mempunyai rintangan yang kecil

• the current flowing through its body is very small.

  arus yang mengalir melalui badan tupai sangat kecil

Diagram shows three resistors which are connected in series.

Rajah menunjukkan tiga perintang yang disambung secara bersiri.

Which of the following is correct?

Antara berikut, yang manakah betul?

• V₃ > V₂ > V₁

• V₁ = V₃ > V₂

• V₁ = V₂ = V₃

• V₁ = V₃ < V₂

In the following circuits, all the resistors and light bulbs are similar. In which circuit is the light bulb the brightest?

Tiap perintang dan lampu dalam litar-litar berikut adalah serupa. Lampu dalam litar yang manakah menyala dengan paling cerah?

• 
• 
• 
• 

The diagram below shows a circuit where a wire PQ is connected parallel to a voltmeter.

Litar dalam rajah di bawah menunjukkan dawai PQ telah disambung secara selari dengan voltmeter.

Which of the following statement is true?

Antara yang berikut pernyataan manakah adalah benar?

• The reading of the ammeter will increase if a longer wire PQ is used.

  Bacaan ammeter akan bertambah jika dawai PQ yang lebih panjang digunakan.

• The reading of the voltmeter will increase if a shorter wire PQ is used.

  Bacaan voltmeter akan bertambah jika dawai PQ yang lebih pendek digunakan.

• The reading of the voltmeter will decrease if the rheostat is adjusted to a higher resistance value.

  Bacaan voltmeter akan berkurang jika rintangan reostat dilaraskan menjadi lebih tinggi.

• The reading of the voltmeter will decrease if the temperature of wire PQ is increased.

  Bacaan voltmeter akan berkurang jika suhu dawai PQ bertambah.