Fizik Elektrik

Potential difference between two points is defined as

Beza keupayaan di antara dua titik ditakrifkan sebagai

• Current flows is 1 ampere when 1 volt is applied across the two points

  Arus 1 ampere yang mengalir apabila 1 volt dikenakan merantasi dua titik itu

• Energy released between two points when 1 coulomb of charge flow

  Tenaga yang dibebaskan di antara dua titik itu apabila 1 coulomb cas mengalir

• Power released between two points when 1 coulomb of charge flow

  Kuasa yang dibebaskan di antara dua titik itu apabila 1 coulomb cas mengalir

• Energy released between two points when 1 ampere of current flow through the two points

  Tenaga yang dibebaskan di antara dua titik itu apabila 1 ampere arus mengalir melalui dua titik itu

Which diagram shows the correct electric field pattern?

Rajah manakah yang menunjukkan corak medan elektrik yang betul?

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Two uncharged conducting spheres are placed apart. Which of the following diagrams best represents the change distribution when a negatively charged rod is placed near one of them?

Dua sfera konductor yang tidak bercas diletakkan berjauhan. Manakah antara rajah-rajah berikut paling sesuai menerangkan taburan cas apabila satu rod bercas negatif diletakkan berdekatan dengan salah satu daripadanya?

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Which graph shows the relationship between potential difference, V, and current, I,for an ohmic conductor?

Graf yang manakah menunjukkan hubungan antara beza keupayaan, V, dan arus, I, bagi suatu konductor ohm?

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Which graph shows the highest resistance?

Graf manakah menunjukkan rintangan paling tinggi?

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The resistance of a metal wire can be reduce by

Rintangan seutas dawai logam boleh dikurangkan dengan

• Increasing its length

  Tambahkan panjang dawai

• Increasing its diameter

  Tambahkan diameter dawai

• Increasing its resistivity

  Tambahkan kerintangan dawai

• Increasing its temperature

  Tambahkan suhu dawai

Which two electrical quantities are measured in volts?

Manakah di antara kuantiti-kuantiti elektrik berikut diukur dalam unit volt?

• current and e.m.f.

  arus dan d.g.e.

• current and resistance

  arus dan rintangan

• e.m.f. and potantial difference

  d.g.e. dan beza keupayaan

• potential difference and resistance

  beza keupayaan dan rintangan

An electric heater operates at 230 V carries a current of 2 A.

Sebuah pemanas elektrik beroperasi pada 230 V membawa arus elektrik sebanyak 2A.

How much charge will flow through the electric heater in 2 minutes?

Berapakah cas yang mengalir melalui pemanas elektrik itu selama 2 minit?

• 230 C

• 240 C

• 180 C

• 4 C

When a torch light is switched on for 5 minutes, 720 C of charge flows through the bulb. Calculate the current in the bulb.

Apabila sebuah lampu suluh dihidupkan selama 5 minit, 720 C cas mengalir melalui mentol. Hitungkan arus yang mangalir melalui mentol.

• 0.42 A

• 2.40 A

• 14.40 A

• 28.80 A

When an electric kettle with a voltage rating of 220 V is connected to a 220 V power supply, the water in the kettle boils in 10 minutes. What is the time taken for the water to boil if the electric kettle is connected to a 200 V power supply?

Apabila cerek elektrik dengan kadaran voltan 220 V disambung kepada bekalan kuasa 220 V, air di dalam cerek itu mendidih dalam masa 10 minit. Berapakah masa yang diambil untuk air itu mendidih jika cerek elektrik itu disambung kepada bekalan kuasa 200 V?

• 10 minutes

  10 minit

• Less than 10 minutes

  Kurang daripada 10 minit

• More than 10 minutes

  Lebih daripada 10 minit