- Half Life and its Measurements
- Problem 1-Half Life and its Measurements
- Problem 2-Half Life and its Measurements
- Problem 3-Half Life and its Measurements

- Series combination of Resistors
- Problem 1-Series Combination of Resistors
- Problem-Current in Series Circuit
- Problem 2-Series Combination of Resistors
- Parallel Combination to Resistors
- More on Parallel Combination to Resistors
- Problem 1-Parallel combination to Resistors
- Problem 2-Parallel combination to Resistors
- Problem 3-Parallel combination to Resistors
- Problem 4-Parallel combination to Resistors

- Hazards of Radiations and Safety Measures
- Ohms Law
- Characteristics of Ohmic and Non Ohmic Conductors
- Problem-Characteristics of Ohmic and Non Ohmic Conductors

- Electrical Energy and Joules law
- Problem 1-Electrical Energy and Joules law
- Problem 2-Electrical Energy and Joules law