Electric current: Ohm’s law, resistivity

According to Thévenin’s theorem, a useful potential difference between the terminals in a linear electric circuit may be described as an ideal voltage source in series with an impedance. This impedance is known as the source’s internal resistance. When the power source supplies current, the measured voltage output is lower than the no-load voltage; the […]

Typically, while examining the theory underlying electrical circuits, it is believed that all of the circuit components are perfect in their performance. A zero resistance battery is believed to exist in an ideal condition for the system’s battery in this case. However, this is not so in practice. When dealing with batteries in the real

A circuit consists of several electronic components: resistors, capacitors, transistors, inductors and diodes. Conductive wires connect all these parts so that the current can flow. If there is any breakage of wire or the circuit is open, the current will not flow. There are two frequently used methods of combining these circuits: parallel combination and series combination. As the

The materials or substances that resist or don’t allow current to pass through them are insulators. In other words, they hinder the flow of electrical current. Conductors are the opposite of insulators. Meaning to say, they allow free movement of electric particles. Insulators are usually found in our household items and electrical circuits. They act

Resistivity is based on the type of materials used to conduct electricity. From plastics and metals to fluids, every material has some resistance to the current flow. It is an informative quantity that can be used to determine moisture content, dissipation factors and dielectric breakdown of a material. Higher the resistivity, lower the conductance. It

There are two major types of resistors, linear and nonlinear. The current production is linearly proportional to the applied voltage in linear resistance. As voltage changes, the current also changes. Nonlinear resistors are those where there is no effect of any change in applied voltage on the producing current. In variable resistors, the resistance value

Insulators are materials that can resist energy transfer. On the other hand, conductors can transmit energy. As there are various types of energy, there are different types of insulators. Glass is the strongest insulator as it has the chemical bonding needed to give it a great insulating ability. Many materials can be labelled as electrical

Electrons, protons, ions, or holes are all-electric current carriers examples. In a wire, when the charge carriers are electrons, the electric current measures the amount of charge traversing any given point in the wire at any given time. There is a difference between the alternating and direct current in the movement of the electric charges.