The Nathpa-Jhakri project is located in the state of Himachal Pradesh.

The Nathpa-Jhakri project is a hydroelectric power project that is considered one of the largest and most successful projects of its kind in India. It is located on the river Satluj in the Kinnaur district of Himachal Pradesh.

Here is a detailed explanation of the answer:

Location and significance of the Nathpa-Jhakri project:
- The Nathpa-Jhakri project is located in the state of Himachal Pradesh, which is situated in the northern part of India.
- The project is specifically located in the Kinnaur district of the state.
- It is situated on the river Satluj, which is one of the major rivers in the region.
- The project holds great significance for the state and the country as it is a major source of hydroelectric power generation.

Hydroelectric power generation:
- The Nathpa-Jhakri project is a hydroelectric power project, which means it generates electricity by utilizing the force of flowing water.
- The project consists of a dam, a reservoir, and underground powerhouses.
- The dam is built on the river Satluj, creating a reservoir that stores water.
- The water from the reservoir is then released through penstocks (large pipes) to the underground powerhouses.
- The flowing water drives turbines, which in turn generate electricity.
- The generated electricity is then transmitted to various parts of the country through a network of transmission lines.

Importance of the project:
- The Nathpa-Jhakri project has a total installed capacity of 1,500 megawatts (MW).
- It is one of the largest hydroelectric power projects in India.
- The project plays a crucial role in meeting the electricity demands of the region and the country.
- It helps in reducing the dependence on fossil fuels for electricity generation, thus contributing to a cleaner and more sustainable energy mix.
- The project also provides employment opportunities to the local population and contributes to the overall development of the region.

In conclusion, the Nathpa-Jhakri project is located in the state of Himachal Pradesh. It is a hydroelectric power project that generates electricity by utilizing the force of flowing water from the river Satluj. The project is significant for the state and the country as it helps in meeting the electricity demands and contributes to sustainable development.