electric charge

Quantization of charge

Quantization means that total charge on a charge body is an integral multiple of minimum charge e

Conservation of charge

The principle of conservation of charge states that the total charge of an isolated system remains constant charge can neither be created nor be destroyed

Coulomb's law

The force of attraction or repulsion between two point charges at rest is directly proportional to the product of the charges and inversely proportional to the square of the distance between them

Relative permeability

Relative permittivity is the ratio of absolute permeability of a medium to the perimeter of free space

It is the ratio of the force between two point charges place at a substan distance apart in space or vacuum to the force between the same 2 point charges when place at the same distance apart in a given medium it is a dimensionless quantity and it is sometimes call specific inductive capacity

Define 1 coulom

1 Kulam is that charge which when place in a free space at a distance 1 m from an equal and similar charge repale with a force of 9 into 10 to the power 9 Newton

Define 1 coulomb in electric current electricity

One coulom is defined as the charge transfer through any cross section of a conductor in any 1 second by and wearing current of 1 ampere

Similarities between electrostatic and gravitational force

Both obey inverse law

Both force can operate even in vacuum

The two forces act along the line joining two charges or masses

Both forces are Central forces and hence conservative

Difference between electrostatic and gravitational force

Electrostatic force are much stronger than gravitational force

Gravitational force are always attractive but electrostatic may be attractive or a person depending on the charge

Gravitational force does not depend on medium but electrostatic force depend on median

Define the principle of superposition

The principle of superposition stage start when a number of charges are interacting the resultant force on a particular charges given by the vector sum of the force produced by the individual charges

Define electric field

Electric field is a reason where an electric charger experience is a force

Define source charge

The charge which create the field

Test charge

The charge which experiences the force is called the test charge

Electric intensity

The electric intensity at any point in a electric field is the force experienced by unit positive test charge kept at that point

Define electric intensity at a point

Directorate intensity at a point is defined as the force acting on the test charge place at that point when Q not approaches zero

Define electric dipole

Appear of equal and opposite charges separated by a small vector distance is called an electric dipole the line joining the two charges is called the dipole access

Define axial line

A line passing through dipole axis

Define equatorial line

A line passing through the centre of the dipole and perpendicular to the axial line is called equatorial line

Define dipole moment

Dipole moment is a vector directed from the negative to positive charge along the dipole Axis the electric field produced by a dipole is called a dipole field

Which is bigger the charge or electron or 1 coulom

1 coulom is bigger than the charge on the electron the charge on the electron is 1.6 into 10 to the power minus 19 coulomb

Is it possible that a charge particle free to move in an electric field always move along the electric line of force

Not necessary if an electric field is applied at an angle to the direction of motion of the charge particles than the particle need not to move along the line of force

What type of symmetry is associated with the field due to appoint charge and dipole

Spherical symmetry and cylindrical symmetry

No two line of four centre set with each other why

The tangent to the line of force give the direction of electric field if two lines of force intersect at a point of intersection the resultant electric intensity will have two different directions which is not possible

What is an ideal dipole

Adipool with a very large charges separated by a very small distance is called an ideal dipole its dipole moment is a constant

2. Charges + q and - Q are placed at a distance d apart what are the point at which the resultant field is parallel to the line joining the two charged

Two equal and opposite charges separated by a distance constituent and electric dipole the resultant electric field will be parallel to the line joining the two charges at any point on the line joining the charges and any point on the perpendicular bisector of the line joining the charges

Why absolute permittivity is called so

Because it is related to only that particular medium

Can we apply coulomb's law to any type of charge distribution

No charge must be stationary and point size

What is the importance of woolence law in vector form

The vector equation tell us that electrostatic force are Central forces and the force exerted by two charges on each other are equal in magnitude and opposite and direction

What orientation of an electric dipole in a uniform electric field correspond to its stable equilibrium

The torque on the dipole will become zero when a dipole moment is parallel to electric intensity

What is a conservative field given example

If the line integral of a field around a close path is zero then such a field is called conservative field for example electrostatic field

What is the direction of the electric intensity at a point on the end on position of a dipole write its expression

Electric intensity due to an electric dipole at axial point at a point on its end on position is it directly along the direction of a dipole moment

What is the direction of electric intensity at a point on a board side on position of a dipole moment

The electric intensity is directed opposite to the direction of the dipole moment

What will be the net electric force acting on an electric dipole placed in an uniform electric field

Zero the forces acting on the dipole charges are equal in magnitude and opposite in directions to the net force is zero