Electrical Engineering

Electrical engineering became known during the early 16th century. In the early 17th century, it became more popular with the notable contributions of George Ohm, Michael Faraday, and James Clark Maxwell.
It is concerned with the use of electricity to transmit energy. It can include the field of electronic engineering since it also uses power and motor control. It has many sub disciplines such as:
Power engineering which is concerned with the generation, transmission, and distribution of electricity.
Control engineering which is concerned with the modeling of dynamic systems and controllers.
Electronics engineering which is the design and testing of electronic circuits.
Microelectronics which is the fabrication of micro circuit components.
Signal processing which is the analysis and manipulation of signals.
Telecommunications engineering which is concerned with the transmission of information through certain channels.
Instrumentation engineering which is the design of devices that measure pressure, flow, and temperature.
Computer engineering which is the design of computers and computer systems.
Mechanical engineering, on the other hand, has these subdisciplines:
Mechanics, the study of forces and their effect on matter.
Kinematics, the study of the motion of objects and systems.
Mechatronics and Robotics, the design and creation of hybrid systems and robots.
Structural and Failure Analysis, the study of how and why objects fail.
Thermodynamics, the study of energy.
Technical drawing (Drafting) and CNC, the design and creation of products.
Nanotechnology, the creation of microscopic devices.
Mechanical engineering uses physics and science in analyzing, designing, manufacturing, and maintenance of mechanical devices and systems. Mechanical engineers use heat and mechanical power to produce machines and tools.
It developed during the Industrial Revolution of the 18th century and has then evolved into a much broader field as technology advances. It also works together with other engineering fields, particularly with electrical engineering.

It is good that you have taken the initiative early. That shows your enthusiasm. Now that you have decided to take the test you must reflect the thought "Why exactly do I want to write GATE?"
There are two perspectives to that question-
1. Decent score to get a good job
2. For further studies and if you are interested in research, it will be a good start.
Since you are in your second year, try joining an institute for guidance and attend the classes. Prefer going to the crowded ones for a better GATE score and low understanding if you want an immediate job.
(Or)
Go to a private tutorial who have less number of students and give more specific interest in feeding in the basics or the base of fundamental engineering. Here you will learn how things work instead of mugging up formulae.
Try searching for applications on your smart phone or laptop that keeps you updated about the exam. Believe me there are lot of such applications.
Although still in second year I wont recommend you to waste time in interesting yet not so important topics in your curriculum
Now these points that I mention will be of utmost importance.
1. Take down the syllabus of your specified course and stick to the syllabus.
2. Make sure you make one and only one notebook per subject, lets say its the fair notebook and you must keep it as a relic. Whatever you enter into this notebook should be very important points and no rough work or rubbish. Keep a rough note too to do those things.
3. Start watching videos from NPTEL. Its free and the best as far as I can go.
4. Once you start doing it enrol in a class and always attend it. Never miss a class.
5. Go slow take your time you have plenty of it.