7.1 Electric Field

1 Diagram 1 shows the electric field lines for a pair of charged particles, Q1 and Q2.

Rajah 1 menunjukkan garis medan elektrik bagi sepasang zarah bercas, Q1 dan Q2.

DIAGRAM 1 / RAJAH 1

What are the charges of Q1 and Q2?

Apakah cas bagi Q1 dan Q2?

Q1 Q2

A Positive / Positif Negative / NegatifB Positive / Positif Positive / PositifC Negative / Negatif Positive / PositifD Negative / Negatif Negative / Negatif

Answer A

1. Which diagram shows the correct electric field pattern? Rajah manakah menunjukkan corak medan elektrik yang betul?

Q2Q1

DC

BA

Answer B

7.2 Ohms Law

1 Which graph shows the relationship between potential difference, V, and current, I for an Ohmic conductor?Graf manakah menunjukkan hubungan di antara beza keupayaan, V dan arus, I bagi sebuah konduktor Ohm?

Answer A

1 Table 1 gives the values of current, I and potential difference, V for a conductor that obeys Ohm's law.

Jadual 1 memberi nilai-nilai bagi arus, I, dan beza keupayaan, V, bagi suatu konduktor yang mematuhi hukum Ohm.

I / A V / V0.40 1.000.70 y

x 2.251.20 3.00

TABLE 1 / JADUAL 1

What are the values of x and y?

Berapakah nilai x dan nilai y?

x y

A 0.80 2.00B 0.85 2.50C 0.90 1.75D 1.00 1.63

Answer C

7.3 Series & Parallel

1 Diagram 1 shows an electric circuit.

Rajah 1 menunjukkan satu litar elektrik.

DIAGRAM 1 / RAJAH 1

What are the readings of ammeters A1 and A2?

Apakah bacaan ammeter A1 dan A2?

Ammeter A1 Ammeter A2

A 0.60 A 0.60 AB 1.50 A 1.50 AC 0.75 A 0.75 AD 0.60 A 0.30 A

Answer A

1 The circuit shown contains four lamps and three switches.Litar dibawah mengandungi empat lampu dan tiga suis.

Which switches must be closed to light up only lamps 1 and 3?

6 V

3 Ω

4 Ω

4 Ω

A2

A1

Diagram 1Rajah 1

Suis yang manakah harus dihidupkan untuk menyalakan lampu 1 dan 3 sahaja?

A switch 1 onlysuis 1 sahaja

B switch 1 and switch 2 onlysuis 1 dan suis 2 sahaja

C switch 1 and switch 3 onlysuis 1 dan suis 3 sahaja

D switch 2 and switch 3 onlysuis 2 dan suis 3 sahaja

Answer A

7.4 EMF

1 Diagram 1 is a graph which shows how the potential difference, V, across the terminals of a cell changes with the current, I, through the cell.

Rajah 1 ialah graf yang menunjukkan bagaimana beza keupayaan,V, merentasi terminal sebuah sel berubah dengan arus, I, melalui sel itu

DIAGRAM 1 / RAJAH 1

What is the internal resistance of the cell?

Berapakah rintangan dalam sel itu?

A 0.80 Ω B 1.16 Ω C 1.25 Ω D 1.43 Ω

Answer C

7.5 Energy Power

I / A

V / V

0.840.20

0.4

1.2

0

1 Which of the following light bulbs has the highest efficiency?

Mentol yang manakah mempunyai kecekapan paling tinggi?

A B

C D

Answer A

8.1 Magnetic Effect

1 Diagram 1 shows the set up of the apparatus to study the pattern of the magnetic field produced by the current in a straight wire

Rajah 1 menunjukkan susunan radas bagi mengkaji pola medan magnet yang dihasilkan oleh arus yang mengalir dalam satu dawai lurus.

80 J heat / haba

40 J light / cahaya

120 J electrical energy / tenaga elektrik

110 J heat / haba

50 J light / cahaya

160 J electrical energy / tenaga elektrik

50 J heat / haba

30 J light / cahaya

80 J electrical energy / tenaga elektrik

130 J heat / haba

70 J light / cahaya

200 J electrical energy / tenaga elektrik

WireDawai

CardboardKadbod Iron filings

Serbuk besi

ObserverPemerhati

DIAGRAM 1 / RAJAH 1

Which diagram shows the correct pattern and direction of the magnetic field that will be seen by the observer?

Rajah manakah menunjukkan pola serta arah yang betul bagi medan magnet yang akan dilihat oleh pemerhati itu?

A B C D

Answer B