The standard time to steam rice in an electric pressure cooker is approximately 3 to 5 minutes per cup of rice. This duration can vary slightly depending on the specific model and the rice's texture preference. For instance, if you prefer a softer texture, you may opt for the longer end of the range, while a firmer texture can be achieved with the shorter end. The key to achieving perfect rice in an electric pressure cooker lies in the precise balance of pressure, temperature, and cooking time.

The reason for this relatively short cooking time is due to the intense pressure and heat generated by the electric pressure cooker. These conditions allow for a rapid transfer of heat to the rice, which cooks it much faster than traditional methods. The pressure inside the cooker can reach up to 11.6 psi (pounds per square inch), which is significantly higher than the atmospheric pressure at sea level. This increased pressure raises the boiling point of water, allowing it to reach temperatures well above the normal boiling point of 212°F (100°C). As a result, the rice cooks at a higher temperature and pressure, which shortens the cooking time.

According to a study published in the Journal of Food Science, the cooking time for rice in an electric pressure cooker can be reduced by up to 70% compared to traditional cooking methods. This efficiency is attributed to the combination of high pressure and temperature, which not only speeds up the cooking process but also helps to preserve the nutritional value of the rice. Additionally, the pressure cooker's sealed environment prevents the loss of steam, ensuring that the rice is fully cooked and fluffy.

In conclusion, steaming rice in an electric pressure cooker typically takes between 3 to 5 minutes per cup of rice, thanks to the high pressure and temperature conditions that facilitate rapid cooking. This method not only saves time but also preserves the nutritional quality of the rice, making it a highly efficient and convenient option for busy individuals or those looking to enhance their cooking experience.