Important Formulas and Laws for the Physics Section of the JEE Main Exam:

The JEE Main exam is a highly competitive engineering entrance exam in India. The Physics section of the exam requires a strong understanding of fundamental concepts, as well as the ability to apply various formulas and laws. Here are some of the important formulas and laws that you should focus on while preparing for the Physics section of the JEE Main exam:

1. Newton's Laws of Motion:
- Newton's First Law: An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force.
- Newton's Second Law: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It can be represented mathematically as F = ma, where F is the net force, m is the mass of the object, and a is the acceleration.
- Newton's Third Law: For every action, there is an equal and opposite reaction.

2. Kinematics:
- Equations of Motion: There are four equations of motion that relate displacement, initial velocity, final velocity, acceleration, and time. These equations are frequently used to solve problems related to motion.
- Projectile Motion: The motion of an object projected into the air at an angle is known as projectile motion. The equations for projectile motion can help determine the range, maximum height, and time of flight of the projectile.

3. Work, Power, and Energy:
- Work-Energy Theorem: The work done on an object is equal to the change in its kinetic energy. Mathematically, it can be represented as W = ΔKE.
- Law of Conservation of Energy: Energy cannot be created or destroyed; it can only be transferred or transformed from one form to another. This law is useful in analyzing various energy transformations in different scenarios.
- Power: Power is the rate at which work is done or energy is transferred. It can be calculated using the formula P = W/t, where P is power, W is work done, and t is time.

4. Electromagnetism:
- Coulomb's Law: Coulomb's law states that the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, it can be represented as F = k(q1q2/r^2), where F is the force, q1 and q2 are the charges, r is the distance between them, and k is the electrostatic constant.
- Ohm's Law: Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance. It can be expressed as V = IR, where V is the voltage, I is the current, and R is the resistance.

5. Optics:
- Snell's Law: Snell's law describes the relationship between the angles of incidence and refraction when light passes through different mediums. It can be represented as n1sinθ1 = n2sinθ2, where n1 and n2 are the refractive indices of the respective mediums, and θ1 and θ2 are the angles of incidence and refraction.
- Lens Formula