Скачать или смотреть Factors Affecting Resistance | Electric Current | Class 10 SSC Physics 2026 | Part 6 | Numericals

In this video, we continue Class 10 SSC Physics – Electric Current (Part 6) and understand:

👉 Factors Affecting Resistance

This topic is very important for SSC Board Exams 2026 and is frequently asked in theory as well as numerical problems.


📌 Topics Covered:

✔️ What is Resistance?
✔️ SI Unit of Resistance (Ohm – Ω)
✔️ Factors Affecting Resistance
✔️ Length of Conductor
✔️ Area of Cross-Section
✔️ Nature of Material (Resistivity)
✔️ Effect of Temperature
✔️ Formula: R = ρL/A
✔️ Simple Numericals


🎯 Key Concepts:

🔹 Resistance (R): Opposition offered by a conductor to the flow of electric current.

🔹 Resistance depends on:

1️⃣ Length (L) → More length → More resistance
2️⃣ Area (A) → More area → Less resistance
3️⃣ Material (ρ – Resistivity) → Different materials have different resistivity
4️⃣ Temperature → For metals, resistance increases with temperature

👉 Formula:
R = ρL / A

Where,
R = Resistance
ρ = Resistivity
L = Length
A = Area of cross-section


📚 Important Exam Questions:
1. Define resistance.
2. Write the factors affecting resistance.
3. Write the formula for resistance.
4. How does temperature affect resistance?
5. Solve numericals based on R = ρL/A.


📌 This topic is very important for understanding Ohm’s Law and solving circuit problems.

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