Electric charge Electrostatics is a branch of physics that deals with the phenomena and properties of stationary or slow-moving electric charges with no acceleration. Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges: positive and negative. … Read more

Electric Lines of Force Electric lines of force in an electric field is defined as the paths along which a unit positive charge tends to move if it is free to do so. The tangent drawn at any point on electric line of force gives the direction of electric field intensity at that point. Note:It … Read more

Electric Field and its physical significance The space surrounding an electric charge Q in which another charge q experiences an electrostatic force of attraction or repulsion,is called the electric field of charge Q. ** Here charge Q is called the source charge and charge q  is  the called test charge. As we know that electrostatic … Read more

Potential Energy of Dipole in a Uniform Electric Field The work done in rotating  the dipole  from one orientation to another is stored in the form of energy called potential energy of dipole. It is a scalar quantity.S.I. unit of potential energy is joule (J). Work done to rotate the dipole electric field through an … Read more

  Electric Field Intensity at a point on the axial line of an electric dipole   This position is also known as ‘End-on position’.   What is an axial line? Axial line is the line joining the centres of positive and negative charges forming an electric dipole.   Consider an electric dipole consisting of +q … Read more

Electric Dipole in a uniform electric field Consider an electric dipole in a uniform electric field which is due to some other source.The dipole moment ( ) makes an angle θ with the electric field () as shown in Figure. The forces on charges +q and -q are qE and -qE respectively. The magnitude of … Read more

Electric dipole and its physical significance A pair of two equal and opposite charges separated by some distance is called an electric dipole. Example:Two charges + q and -q separated by a small distance 2l constitute an electric dipole as shown in figure. The distance (2l) between two charges is known as dipole length. Total … Read more

Electric field intensity due to a point charge Consider a fixed point charge Q at the origin O.Let q be the test charge placed in a medium at a distance r from origin in the electric field of the charge Q. Then force on charge q due to point charge Q is given by Therefore,electric … Read more