The cooking time for pork leg in an electric pressure cooker typically ranges from 35 to 45 minutes, depending on the size and cut of the pork leg. This method is efficient and yields tender, juicy results due to the pressure cooking process, which accelerates the cooking time compared to traditional methods.

The reason for this cooking time is rooted in the principles of pressure cooking. Electric pressure cookers use high pressure and temperature to cook food faster. The pressure increases the boiling point of water, allowing the food to cook at a higher temperature than it would in an open pot. This rapid cooking process ensures that the pork leg becomes tender without overcooking or drying out. According to the USDA Food Safety and Inspection Service, cooking pork to an internal temperature of 145°F (63°C) is sufficient to kill harmful bacteria. In an electric pressure cooker, this temperature is reached more quickly, thus reducing the overall cooking time.

For a 3 to 4-pound pork leg, the recommended cooking time is around 35 to 40 minutes. For larger cuts, such as a 5 to 6-pound pork leg, the cooking time may extend to 45 minutes. It's important to note that the cooking time can vary based on the specific model of the electric pressure cooker and the pork leg's starting temperature. Pork that has been thawed or brought to room temperature before cooking will generally cook faster than frozen pork.

Additionally, the cooking time can be influenced by the pressure setting on the electric pressure cooker. Most models have a high-pressure setting, which is ideal for cooking meat like pork leg. The high pressure ensures that the meat is cooked evenly and quickly. It's also crucial to follow the manufacturer's instructions for adding liquid and setting the pressure level, as these factors can affect the cooking time and the final outcome.

In summary, cooking pork leg in an electric pressure cooker takes approximately 35 to 45 minutes, depending on the size of the pork leg and the specific model of the pressure cooker. This method is efficient and ensures that the pork leg is cooked to perfection, with a tender texture and juicy flavor.