This is about some basic principles of physics.

1. Basic Principles of
Physics
B L KOLI
ASSISTANT PROFESSOR IN PHYSICS
MAHARANA PRATAP GOVT. P. G. COLLEGE
CHITTORGARH

2. Newton’s First law--Newton’s 1st law states that a body at rest or in
uniform motion will continue to be at rest or in uniform motion until and unless
a net external force acts on it.
Newton’s Laws of motion

3. Newton’s second law----The time rate of change of momentum of a body is
directly proportional to force applied on the body.
Newton’s Third law---- The Newton’s 3rd law states that for every action
there is an equal and opposite reaction.

4. Coulomb’s law
According to Coulomb’s law, the force of attraction or
repulsion between two point charges is directly proportional
to the product of their charges and inversely proportional to
the square of the distance between them. It acts along the
line joining the two charges considered to be point charges.

5. Universal law of Gravitation
Newton’s law of gravitation state that any particle of
matter in the universe attracts any other with a force
varying directly as the product of the masses and inversely
as the square of the distance between them.

6. Ohm’s law
Ohm's law states that the current through a conductor
between two points is directly proportional to the voltage
across the two points.

7. Hook’s law
It states the extension of a spring is directly proportional
to the load applied on it.

8. Faraday’s laws
First law—whenever magnetic flux linked with a circuit changes an emf is induced in
it which lasts so long as change in magnetic flux continues.
Second law---The magnitude of the induced emf in a circuit is equal to the time rate of
change of magnetic flux through the circuit. Mathematically, the induced emf is given
by ε = ‒ (dϕ/dt).
Negative sign shows that the current induced in a circuit always flows in such a
direction that it opposes the change or the cause that it opposes the change or the
cause produces it.
In the case of a closely wound coil of N turns, change of flux associated with each
turn, is the same. Therefore, the expression for the total induced emf is given by
ε = ‒ N (dϕ/dt)

9. Black body radiations
A body which completely absorbs the radiations incident on it is called
a black body. The energy radiated by the blackbody is called
blackbody radiations.
Wien's displacement law
The product of the wavelength corresponding to the maximum
intensity of the thermal radiation and absolute temperature is
constant.
mT=b

10. Projectile motion
A projectile is the body or object thrown or projected into
the air, in such a way that after projection it moves under
the effect of gravity. The motion is called projectile
motion, and its path is called its trajectory.

11. Interference and Diffraction
Interference is a phenomenon in which two waves superpose to form a resultant
wave of greater, lower, or the same amplitude. Constructive and destructive
interference result from the interaction of waves that are correlated or coherent
with each other, either because they come from the same source or because they
have the same or nearly the same frequency.
Diffraction is defined as the bending of waves around the corners of an obstacle or
through an aperture into the region of geometrical shadow of the obstacle/aperture.

12. Simple pendulum
A simple pendulum is just a heavy point mass suspended
from one end of an inextensible, weightless string whose
other end is fixed in a rigid support—this point being
referred to as the point of suspension of the pendulum.