Yes, there are several specific experiments and practical applications that you should study for the physics section of the JEE Main exam. These experiments and applications are important as they help in understanding and applying the fundamental concepts of physics. Here are some key experiments and their practical applications:

1. Young's Double Slit Experiment:
- This experiment demonstrates the wave nature of light and interference phenomenon.
- It is used to measure the wavelength of light, which is important in various applications such as optics, spectroscopy, and diffraction grating.

2. Millikan's Oil Drop Experiment:
- This experiment determines the charge of an electron by observing the motion of oil droplets in an electric field.
- It is used to study the behavior of charged particles in electric fields and is important in fields like particle physics and electronics.

3. Rutherford's Gold Foil Experiment:
- This experiment established the existence of a dense, positively charged nucleus in an atom.
- It is used to study the structure of an atom and provides insights into nuclear physics and atomic models.

4. Photoelectric Effect Experiment:
- This experiment demonstrates the particle nature of light and the emission of electrons from a metal surface when exposed to light.
- It is used in various applications like photovoltaic cells, photoelectric sensors, and digital imaging.

5. Michelson-Morley Experiment:
- This experiment aimed to detect the motion of the Earth through the hypothetical luminiferous aether.
- It provided evidence against the existence of aether and supported Einstein's theory of special relativity.

6. Ohm's Law Experiment:
- This experiment establishes the relationship between current, voltage, and resistance in an electrical circuit.
- It is used in various applications of electrical engineering, such as designing circuits, calculating power consumption, and troubleshooting electrical systems.

7. Thomson's Cathode Ray Experiment:
- This experiment discovered the existence of negatively charged particles, later named electrons.
- It led to the development of cathode ray tubes and laid the foundation for modern electronics.

8. Hertz's Experiment on Electromagnetic Waves:
- This experiment demonstrated the existence and properties of electromagnetic waves.
- It paved the way for the development of wireless communication, radio, and other electromagnetic technologies.

9. Cavendish Experiment:
- This experiment determined the gravitational constant and measured the mass of the Earth.
- It provided insights into the fundamental force of gravity and is important in fields like astrophysics and geophysics.

10. Hall Effect Experiment:
- This experiment demonstrates the presence of an electric field perpendicular to the current flow in a conductor when subjected to a magnetic field.
- It is used to measure the magnitude and direction of magnetic fields and has applications in magnetic sensors and current measurements.

These experiments and practical applications are crucial for a comprehensive understanding of physics concepts and their real-world implications. Studying and understanding these experiments will not only help you in the JEE Main exam but also provide a strong foundation for further studies in physics and related fields.