1. Define potential difference and state its units

2. Measure potential difference and current in a circuit

3. Verify Ohm’s law

4. Define resistance and state its unit

5. Determine experimentally the voltage – current relationship for various conductors

6. Define emf and explain internal resistance of a cell

7. Derive the formula for effective resistance of resistors in series and in parallel

8. Solve numerical problems involving Ohm’s law, resistors and series and in parallel