Category: 09. Electricity

Introduction Permittivity and permeability are two of the properties of every material that is placed within an electric field or a magnetic field. Although both the properties are related to each other to some extent, the differences between them are too vibrant. Permittivity mostly operates in the formation of an electric field whereas permeability operates…

Introduction We do many works in our daily life. We do many of them through our physical activities. Some work is done with tools and other devices. But they also require energy. There are many types of energy like electrical energy, mechanical energy, thermal energy, light energy, and wind energy. In our daily life, we…

Introduction Electric current and conductors are essential for each other because the flow of current is only possible in conductors without any loss. The current is a flow of charges in a particular direction. The flow of current through a conductor is possible due to the difference in potential at both ends. A conductor also…

Introduction The electric car is the best achievement by the automobile sector to make the earth pollution-free. Also, it reduces transportation costs due to no fuel charges or lowmaintains costs. If we have a look at the history of the electric car, the first electric car was invented by Gustave Trouve in 1881. The car…

Introduction Initially, electricity and magnetism were treated as separate subjects. In a later period due to the contribution of Oersted, Faraday, Maxwell, etc., it evolved as a unified subject. The current-carrying wire creates a magnetic field around it. Faraday through his experiments showed that current can be produced even if there are no batteries in the…

Resistance and resistivity are the major terms associated with the opposition in the flow of electric current in a circuit. The most significant difference between resistance and resistivity is that resistance is the measure of opposition offered by the material in the path of electric current, whereas resistivity is the property of material by virtue…

The conversion of mechanical energy into electrical energy and electrical energy into mechanical energy is a necessary process in the industries as well as in our daily life. Electrical machines are used for the conversion of electrical energy into mechanical energy and mechanical energy into electrical energy. Depending upon the type of electromechanical energy conversion, the electrical…

Introduction Electricity is one of the most used things by humans. It is transported from the powerhouse through the wires to the various houses and industrial locations. Electric current has two main types – Direct current and Alternating current. Alternating current mainly flows in the wires which see around us. Electricity has given new dimensions…

Introduction A current coil is basically a type of coil, like a wire, covered around an electrical conductor. The conductor is a soft iron core and the coil is made of insulated copper wire. If the coil covered around the conductor carries current, it is noted that the coil starts acting similar to a magnet.…

Introduction We know that liquids like water carry electric currents due to the presence of salt in them. We get water from natural sources like rivers, lakes, and streams. Minerals are present in this water. They are nothing but salts that carry electric current. Let’s understand the concept of conductivity before studying the conductivity of…