SPM Physics Amali: How to Use a Plotting Compass

 

🧭 Plotting Compass

Kompas lukisan (plotting compass) digunakan untuk menentukan arah garisan medan magnet di sekeliling magnet atau konduktor yang membawa arus.

A plotting compass is used to determine the direction of magnetic field lines around a magnet or a current-carrying conductor.

👀 Cara Membaca | Reading Technique

✅ Letakkan kompas di atas kertas dan tunggu sehingga jarum berhenti berayun.

✅ Place the compass on the paper and wait until the needle stops moving.

✅ Perhatikan arah hujung utara (N) jarum kompas.

✅ Observe the direction of the north-seeking (N) end of the compass needle.

✅ Tandakan arah jarum sebelum mengalihkan kompas ke kedudukan seterusnya.

✅ Mark the needle direction before moving the compass to the next position.

---

❌ Common Mistakes

❌ Menggerakkan kompas sebelum jarum menjadi stabil.

❌ Moving the compass before the needle has stabilised.

❌ Meletakkan kompas terlalu dekat antara satu sama lain sehingga bacaan terganggu.

❌ Placing compasses too close together, causing interference.

❌ Tersalah mengenal pasti hujung utara (N) dan selatan (S) jarum kompas.

❌ Misidentifying the north (N) and south (S) ends of the compass needle.

❌ Meletakkan objek logam berhampiran kawasan eksperimen.

❌ Placing metallic objects near the experiment area.

---

⚠️ Safety / Handling

⚠️ Jauhkan kompas daripada magnet kuat apabila tidak digunakan.

⚠️ Keep the compass away from strong magnets when not in use.

⚠️ Elakkan menjatuhkan kompas kerana jarumnya sangat sensitif.

⚠️ Avoid dropping the compass as the needle is very delicate.

⚠️ Pastikan kompas diletakkan di atas permukaan rata.

⚠️ Ensure the compass is placed on a flat surface.

---

🎯 SPM Exam Tip

📌 Hujung utara (N) jarum kompas sentiasa menunjukkan arah medan magnet.

📌 The north (N) end of the compass needle always points in the direction of the magnetic field.

📌 Garisan medan magnet di luar magnet bar menghala dari kutub Utara ke kutub Selatan.

📌 Magnetic field lines outside a bar magnet flow from the North pole to the South pole.

📌 Plotting compass digunakan untuk memetakan bentuk garisan medan magnet.

📌 A plotting compass is used to map the shape of magnetic field lines.

📌 Dalam eksperimen SPM, beberapa kompas sering digunakan serentak untuk menunjukkan corak medan magnet dengan lebih jelas.

📌 In SPM experiments, several compasses are often used simultaneously to show the magnetic field pattern more clearly.