what is coulomb's law well you will learn something very special in this
lecture about coulomb's law i will teach you the basic concept of coulomb's law
derivation of coulomb's law bonus questions best and easy explanation of writing
coulomb's law and vector form applications and numericals so watch this lecture
till the end and you will learn something very awesome firstly let me quickly
revise the concept of forces between two charges we all know that like charts repel
for example consider two positive charge
we all know that they both repel each other now in physics we do not say
that they repel each other rather we say that they experience repulsive force here
if i ask you that how can you draw the direction of repulsive forces can you draw
it well many students do not know it let me draw it this charge experiences
repulsive force in this direction and this charge experiences repulsive force in
this direction so remember that there are two repulsive forces similarly consider
two negative charge we know that they also repel each other
because they are like charge so here again two forces act on two charge
separately secondly we know that unlike charge attract for example consider a
positive charge and a negative charge now in physics we do not say that they
attract each other rather we say that they experience attractive force in case of
attractive forces we draw them like this so remember that attractive force are also
two forces between two charge now here comes the most important question if i ask
you how much repulsive force
exists between these two charts or how much attractive force exists
between these two charts how can you calculate it well it was first french
scientist coulomb who successfully calculated this repulsive force between unlike
charge and attractive force between like charge he put forward his famous law which
we call coulomb's law thus in simple words coulomb's law calculate the force of
attraction a repulsion between two charge let me repeat it in simple words
coulomb's law calculate the force of
attraction a repulsion between two chars here let me teach you one
important term which is difficult for some students we all know that we measure
mass and kg for example we say that 10 kg fruits similarly we measure charge in
coulombs for example let the magnitude or size of this charge is 0.5 coulomb and
the magnitude or size of this charge is 0.3 coulomb now if i say product of
magnitude of charge can you understand it well it means that we multiply the
magnitude of these two charts and we write
0.5 and 0.3 so noted down this basic concept which some students are not
understanding now let me teach you what is coulomb's law well we have already
learned that coulomb's law calculate the attractive or repulsive force between two
charge now consider two static charge a two point charge at rest let i keep them
and vacuum our air that the distance between these two charts is r the size our
magnitude of this charge is q1 and the size or magnitude of this charge is q2 we
already know that there exist repulsive force between them
now the question is how much repulsive force well according to coulomba
the force between these two charges is directly proportional to the product of
magnitude of charge let me repeat it the force between these two charges is
directly proportional to the product of magnitude of charge let this is equation
number one secondly coulomb states that the force between these two charge is
inversely proportional to the square of distance between them let me repeat it the
force between these two charge is inversely proportional to
the square of distance between them that this is equation number two now
listen carefully i combine equation number one and equation number 2 i write f is
lecture about coulomb's law i will teach you the basic concept of coulomb's law
derivation of coulomb's law bonus questions best and easy explanation of writing
coulomb's law and vector form applications and numericals so watch this lecture
till the end and you will learn something very awesome firstly let me quickly
revise the concept of forces between two charges we all know that like charts repel
for example consider two positive charge
we all know that they both repel each other now in physics we do not say
that they repel each other rather we say that they experience repulsive force here
if i ask you that how can you draw the direction of repulsive forces can you draw
it well many students do not know it let me draw it this charge experiences
repulsive force in this direction and this charge experiences repulsive force in
this direction so remember that there are two repulsive forces similarly consider
two negative charge we know that they also repel each other
because they are like charge so here again two forces act on two charge
separately secondly we know that unlike charge attract for example consider a
positive charge and a negative charge now in physics we do not say that they
attract each other rather we say that they experience attractive force in case of
attractive forces we draw them like this so remember that attractive force are also
two forces between two charge now here comes the most important question if i ask
you how much repulsive force
exists between these two charts or how much attractive force exists
between these two charts how can you calculate it well it was first french
scientist coulomb who successfully calculated this repulsive force between unlike
charge and attractive force between like charge he put forward his famous law which
we call coulomb's law thus in simple words coulomb's law calculate the force of
attraction a repulsion between two charge let me repeat it in simple words
coulomb's law calculate the force of
attraction a repulsion between two chars here let me teach you one
important term which is difficult for some students we all know that we measure
mass and kg for example we say that 10 kg fruits similarly we measure charge in
coulombs for example let the magnitude or size of this charge is 0.5 coulomb and
the magnitude or size of this charge is 0.3 coulomb now if i say product of
magnitude of charge can you understand it well it means that we multiply the
magnitude of these two charts and we write
0.5 and 0.3 so noted down this basic concept which some students are not
understanding now let me teach you what is coulomb's law well we have already
learned that coulomb's law calculate the attractive or repulsive force between two
charge now consider two static charge a two point charge at rest let i keep them
and vacuum our air that the distance between these two charts is r the size our
magnitude of this charge is q1 and the size or magnitude of this charge is q2 we
already know that there exist repulsive force between them
now the question is how much repulsive force well according to coulomba
the force between these two charges is directly proportional to the product of
magnitude of charge let me repeat it the force between these two charges is
directly proportional to the product of magnitude of charge let this is equation
number one secondly coulomb states that the force between these two charge is
inversely proportional to the square of distance between them let me repeat it the
force between these two charge is inversely proportional to
the square of distance between them that this is equation number two now
listen carefully i combine equation number one and equation number 2 i write f is
