Subject: General Science
Book: NCERT Physics Class 12
Current electricity deals with the flow of electric charges.
- **Ohm’s Law**:
- V = IR, relationship between voltage, current, and resistance.
- **Kirchhoff’s Laws**:
- Used to analyze electrical circuits.
- **Wheatstone Bridge & Potentiometer**:
- Measuring resistance and potential differences.
**Possible Exam Questions:**
1. Derive an expression for drift velocity and mobility.
2. Explain Kirchhoff’s Laws with an example.
3. What is the principle of a potentiometer?
4. How does a Wheatstone bridge work?
5. Define internal resistance of a cell and its effect on current.
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