Measuring a Resistor with a Digital Multimeter: Reading Technique & SPM Physics Tips

1K resistor

200 ohms resistor

Perintang (resistor) ialah komponen elektronik yang digunakan untuk menghadkan aliran arus elektrik dalam litar. Nilai rintangannya diukur dalam unit ohm (Ω).

A resistor is an electronic component used to limit the flow of electric current in a circuit. Its resistance is measured in ohms (Ω).

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👀 Cara Membaca | Reading Technique

✅ Pilih mod Resistance (Ω) pada multimeter.

✅ Select the Resistance (Ω) mode on the multimeter.

✅ Sentuhkan probe hitam dan probe merah pada kedua-dua kaki resistor.

✅ Touch the black and red probes to the two resistor leads.

✅ Tunggu sehingga bacaan menjadi stabil sebelum direkodkan.

✅ Wait until the reading becomes stable before recording it.

✅ Pastikan resistor tidak disambungkan kepada bekalan kuasa semasa pengukuran.

✅ Ensure the resistor is not connected to a power supply while measuring.

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❌ Common Mistakes

❌ Mengukur resistor semasa litar masih hidup.

❌ Measuring a resistor while the circuit is still powered.

❌ Memilih julat Ω yang tidak sesuai.

❌ Selecting an unsuitable resistance range.

❌ Menyentuh kedua-dua kaki resistor dengan jari semasa pengukuran.

❌ Touching both resistor leads with your fingers during measurement.

❌ Menganggap nilai resistor mesti tepat sama seperti nilai yang tertera.

❌ Assuming the measured value must be exactly the same as the labelled value.

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⚠️ Safety / Handling

⚠️ Matikan bekalan kuasa sebelum mengukur nilai resistor.

⚠️ Switch off the power supply before measuring resistance.

⚠️ Elakkan membengkokkan kaki resistor secara berlebihan.

⚠️ Avoid bending the resistor leads excessively.

⚠️ Simpan resistor dalam bekas yang sesuai selepas digunakan.

⚠️ Store resistors properly after use.

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🎯 SPM Exam Tip

📌 Resistansi diukur dalam unit ohm (Ω).

📌 Resistance is measured in ohms (Ω).

📌 Nilai sebenar resistor mungkin sedikit berbeza daripada nilai nominal.

📌 The actual resistance may differ slightly from the nominal value.

Example from the Photo

✅ Resistor 1 kΩ

Multimeter Reading: 1007 Ω

✅ Resistor 220 Ω

Multimeter Reading: 219.6 Ω

📌 Perbezaan kecil ini adalah normal kerana toleransi pembuatan.

📌 Small differences are normal due to manufacturing tolerance.

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🧠 SPM Concept Check

📌 Semakin besar nilai resistor:

📌 The higher the resistance:

✅ Semakin sukar arus mengalir.

✅ The more difficult it is for current to flow.

✅ Semakin kecil arus dalam litar.

✅ The smaller the current in the circuit.

Ohm's Law

V = IR

Where:

• V = Voltage / Voltan
• I = Current / Arus
• R = Resistance / Rintangan