Introduction
Electricity powers our world—from bulbs to smartphones. In Class 10 Physics (Chapter 12 – Electricity), CBSE students explore electric current, circuits, resistance, and Ohm’s Law. This blog breaks down these concepts with simple explanations and diagrams.
Key Topics Covered:
- Electric Current & Circuit Basics
- Definition: Flow of electrons (I = Q/t)
- Conventional vs. Electron Flow
- Ohm’s Law
- Formula: V = IR
- Experiment & Graph (V vs. I)
- Resistance & Resistivity
- Factors affecting resistance (Length, Area, Material)
- Resistivity (ρ = RA/L)
- Series & Parallel Circuits
- Series: Same current, voltage divides
- Parallel: Same voltage, current divides
- Heating Effect of Current (Joule’s Law)
- H = I²Rt
- Applications: Electric heater, fuse
- Practical Tips for Circuit Diagrams
- Symbols for components (Battery, Resistor, Switch)
- Common mistakes to avoid
Exam Tips:
- Practice numericals on Ohm’s Law and resistance.
- Draw neat and labeled circuit diagrams.
Conclusion
Electricity is a high-weightage chapter in CBSE Class 10. Understanding Ohm’s Law and circuit connections ensures better exam performance and real-life problem-solving skills.
