Electrical Engineering is one of the fastest growing fields that involves study and application of electricity and electronics. It is the most interesting branch of engineering because it involves study of computer, electrical and electronics and communication. Electrical engineering deals with generation, transmission and distribution of electricity.
Electrical Engineers are much in demand in India. In the recent years, from house to companies every where there is a necessity of electricity to function, offering numerous opportunities to electrical engineers.

These engineers can work in atomic power plants, hydel or thermal power plants. Job opportunities are ample in both private and public sector like railways, civil aviation, electricity board and utility companies, electrical design and consultancy firms and all types of manufacturing industries.
Scope and other details: ECE scope

Mechanical Engineering is one of the oldest and broadest engineering branches and hence, one of the most preferred one by the engineering aspirants. The branch applies the principles of engineering, physics and material science for the design, analysis, manufacturing and maintenance of mechanical systems. This branch of engineering involves design, production, and operation of machinery.

Graduates can work in the automotive, aerospace, chemical, computer, communication, paper, power generation and almost all manufacturing industries. Mechanical engineers also work in maintenance and service profiles in all industries. Also they can choose teaching profession in universities and colleges.

Rest details of college, job profiles and other scope details you can check here: Mechanical scope

Based on both profiles you can decide which one you are interested in.
Good luck!