Energy Density in Electric Field Energy density is described as the amount of energy stored in a region or system per unit volume. Electric and magnetic fields can store energy. Energy density is denoted by using the letter u. Consider a parallel plate capacitor of plate area A and plate separation d. Let the charge Read more about Energy Density in Electric Field[…]

Potential Energy of an Electric Dipole in a Uniform Electric Field Work done in bringing an electric dipole from infinity to some point inside the field is equal to the potential energy of an electric dipole in an electric field. Letus bring an electric dipole from infinity into a uniform electric filed E insuch a Read more about Potential Energy of an Electric Dipole in a Uniform Electric Field[…]

Zener Breakdown If the reverse – bias applied to a p – n junction is increased, a point will reach when the junction breaks down and reverse current rises sharply to a value limited only by the external resistance connected in series. This specific value of the reverse bias voltage is called breakdown voltage (V). Read more about Zener Breakdown[…]

Wiedemann – Franz Law Wiedemann – Franz Law is the law which relates the thermal conductivity (k) and the electrical conductivity (σ) of a material which consists of somewhat freely moving electrons in it. Thermal Conductivity (k): It is the degree of capacity of a material to conduct heat. Electrical Conductivity (σ): It is the Read more about Wiedemann – Franz Law[…]

Curie – Weiss Law Curie Weiss law is a law which states that the magnetic susceptibility is directly proportional to the ratio of the Curie constant to the change in the temperature. It is one of the important law in electromagnetism that says that the magnetic susceptibility is above the Curie temperature point of a Read more about Curie – Weiss Law[…]

Electric Field outside the Spherical Shell The force felt by a unit positive charge or test charge when its kept near a charge is called Electric Field. It is also defined as the region which attracts or repels a charge. The electric field is a vector quantity and it is denoted by E. the standard Read more about Electric Field outside the Spherical Shell[…]

Electric field Inside the Spherical Shell The force felt by a unit positive charge or test charge when its kept near a charge is called Electric Field. It is also defined as the region which attracts or repels a charge. The electric field is a vector quantity and it is denoted by E. the standard Read more about Electric field Inside the Spherical Shell[…]

Electric Field due to Infinite Wire The force felt by a unit positive charge or test charge when its kept near a charge is called Electric Field. It is also defined as the region which attracts or repels a charge. The electric field is a vector quantity and it is denoted by E. the standard Read more about Electric Field due to Infinite Wire[…]

Applications of Gauss’s Law According to Gauss’s law, the total of the electric flux out of a closed surface is equal to the charge enclosed divided by the permittivity. The electric flux through a closed surface is zero. If no charge is enclosed by the surface. . Or . So, . Here, is the total Read more about Applications of Gauss’s Law[…]

Magnification Magnifications of a lens is defined as the ratio of the height of image to the height of object. It is also given in terms of image distance and object distance. It is equal to the ratio of image distance to that of object distance. . Where, m = Magnification, hi = Height of Read more about Magnification[…]