Ohm’s Law states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit. In other words, by doubling the voltage across a circuit the current will also double. However, if the resistance is doubled the current will fall by half.

Most Important Laws of Physics
Rimsha Zia
Rimsha Zia

Most Important Laws of Physics

Keywords: Newton Laws, Law of Conservation of Angular Momentum, Law of Conservation of Energy, Ohm Law, Newton Law of Universal Gravitation, Wien Displacement Law, Rayleigh Jeans Law, Tyndall Effect, Moore  Law, Stefan-Boltzmann Law, Graham Law, Heisen Berg Uncertanity Principle, Lenz Law of Electromagnetic Induction, Faraday Law of Electromagnetism, 

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Physics, the branch of science concerned with the nature and properties of matter and energy. Under many condition and situations we have laws (with derivation or without derivation)

These laws are built after various theoretical research, experiments or by using existing information, scientist concluded their various forms with proper justifications after completion of various scientific observations

This article will give you the information of most important laws you must know being a physics student.

Newton Laws:

He developed theories of gravitation, later he gave 3 laws of motion known as 1st 2nd and 3rd law of motion stated as follows:

He stated as “ Newton’s first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. This postulate is known as the law of inertia.

He stated as “ Newton’s first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight

The law defines a force to be equal to change in momentum (mass times velocity) per change in time. For an object with a constant mass m, the second law states that the force F is the product of an object’s mass and its acceleration a:

                                                           F = m * a

The law defines a force to be equal to change in momentum (mass times velocity) per change in time. For an object with a constant mass m

The third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal force on object A.

The third law states that for every action (force) in nature there is an equal and opposite reaction

Law of conservation of angular momentum:

The law of conservation of angular momentum states that when no external torque acts on an object, no change of angular momentum will occur.

The law of conservation of angular momentum states that when no external torque acts on an object, no change of angular momentum will occur

Faraday’s law of electromagnetism:

Faraday states that a current will be induced in a conductor which is exposed to a changing magnetic field.

Faraday states that a current will be induced in a conductor which is exposed to a changing magnetic field

Lenz’s law of electromagnetic induction:

It states that the direction of this induced current will be such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it. The direction of this current flow can be determined using Fleming’s right-hand rule.

Lenz Law states that the direction of this induced current will be such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it

Heisenberg’s Uncertainty principle:

The uncertainty principle is one of the most famous (and probably misunderstood) ideas in physics. It tells us that there is a fuzziness in nature, a fundamental limit to what we can know about the behavior of quantum particles and, therefore, the smallest scales of nature.

The uncertainty principle is one of the most famous (and probably misunderstood) ideas in physics. It tells us that there is a fuzziness in nature

The position and momentum of a particle cannot be simultaneously measured with arbitrarily high precision. there is a minimum for the product of the uncertainties of these two measurements. There is likewise a minimum for the product of uncertainties of the energy and time.

The position and momentum of a particle cannot be simultaneously measured with arbitrarily high precision. there is a minimum for the product of the uncertainties of these two measurements. There is likewise a minimum for the product of uncertainties of the energy and time

Law of conservation of energy:
It states that energy can neither be created nor destroyed but it can be transformed from one form to another. Since energy cannot be created or destroyed, the amount of energy present in the universe is always remain constant.

It states that energy can neither be created nor destroyed but it can be transformed from one form to another

Graham’s Law:
It states that the rates of diffusion of gases are inversely proportional to the square roots of their densities under similar conditions of temperature and pressure.

Graham’s Law:
It states that the rates of diffusion of gases are inversely proportional to the square roots of their densities under similar conditions of temperature and pressure.

StefanBoltzmann law:

Statement says that the total radiant heat power emitted from a surface is proportional to the fourth power of its absolute temperature. The law applies only to blackbodies, theoretical surfaces that absorb all incident heat radiation.

Stefan-Boltzmann law:
Statement says that the total radiant heat power emitted from a surface is proportional to the fourth power of its absolute temperature. The law applies only to blackbodies, theoretical surfaces that absorb all incident heat radiation.

Moore’s law:

Prediction made by American engineer Gordon Moore in 1965 that the number of transistors per silicon chip doubles every year.

Prediction made by American engineer Gordon Moore in 1965 that the number of transistors per silicon chip doubles every year

Tyndall effect
The scattering of light by very small particles suspended in a gas or liquid.

Tyndall effect
The scattering of light by very small particles suspended in a gas or liquid.

Ohm’s Law:

Ohm’s Law states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit. In other words, by doubling the voltage across a circuit the current will also double. However, if the resistance is doubled the current will fall by half.

Ohm's Law states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance in the circuit

Rayleigh jeans Law:

An approximation in respect to thermal radiation: the emissive power of a blackbody at absolute temperature T and at a given wavelength λ is directly proportional to T and inversely proportional to λ4. This law is only valid for long wavelength.

An approximation in respect to thermal radiation

Wien’s displacement law:

It states that the black-body radiation curve for different temperatures will peak at different wavelengths that are inversely proportional to the temperature. 

It states that the black-body radiation curve for different temperatures will peak at different wavelengths that are inversely proportional to the temperature.

Universal laws of gravity:

Newton’s law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers

The equation for universal gravitation thus takes the form:

F=G m1m2/r2

where F is the gravitational force acting between two objects, m1 and m2 are the masses of the objects, r is the distance between the centers of their masses, and G is the gravitational constant.

Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers
The equation for universal gravitation thus takes the form:
F=G 〖 m_1 m〗_( 2)/r^2 



 
where F is the gravitational force acting between two objects, m1 and m2 are the masses of the objects, r is the distance between the centers of their masses, and G is the gravitational constant.
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