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Basic Electrical

RC Circuit: Transient Response & Time Constant

RC Circuit: Transient Response

Definition: The response of current and voltage in a circuit immediately after a change in applied voltage is called the transient response. Refer to Figure 1. A capacitor and a resistor are connected in series across a voltage source. A circuit that contains resistance and capacitance is called an RC …

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AC Inductor Circuits

inductance in ac circuit

In an ac circuit, the applied voltage constantly varies and reverses polarity. Any inductance in the circuit will generate a counter emf, which will oppose the source voltage. This event can be observed by setting up the experiment. Connect a light to a six- volt dc source. Note its brilliance. …

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American Wire Gauge (AWG) System

American Wire Gauge | Chart | Sizes | Circular Mil Definition

Many conductors are much less than an inch in diameter. To simplify area calculations for such conductors, the foot-pound system uses an area unit, called a circular mil, based on a mil, or one-thousandth of an inch (see Figure 1). Definition: One circular mil (CM) is the area of a …

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Electrical Formulas Excel Sheet

electrical formulas

This particular Electrical Formulas Excel Sheet will assist you to get a quick answer to the quantities related to the following topics: 1 – Basic Concepts of Electricity 2 – Electrical Quantities and Components 3 – OHM’s Law 4 – Series Circuits 5 – Parallel Circuits 6 – Series-Parallel Circuits …

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Inductors in AC and DC Circuits

basic inductor

The main action of an inductor is to resist a change in current.  However, since the current in a DC circuit is constant, there is no induced voltage developed instantaneously across the inductor.  The inductor does resist the initial inrush of current based on the time constant of the circuit. …

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Capacitors in AC and DC Circuits

Difference between Capacitor and Battery

Capacitors in DC Circuits             When a capacitor is placed in a DC circuit that is closed (current is flowing) it begins to charge. Charging is when the voltage across the plates builds up quickly to equal the voltage source. Once a capacitor reaches its fully charged state, the current …

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Power in an AC Circuit

Instantaneous Power

In an alternating-current circuit, power is dissipated in a resistor, but not in a pure inductor or a capacitor. Because the current in an RL circuit lags the supply voltage by an angle ϕ, the amount of useful power supplied to the circuit is proportional to Cosϕ. Similarly, in an …

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Conductors and Insulators Definition and Examples

cable cross section

Conductors carry electric current. Insulators protect conductors and protect people from conductors. Whether a material is a conductor or an insulator depends on its atoms and on the relationship of each atom to its surrounding atoms. Insulators may break down if subjected to excessive voltages. Similarly, conductors may be destroyed …

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Passive Components in AC Circuits with Equations

figure 11 parallel rlc circuit

There are three key passive elements used in many electrical and electronic circuits such as: Resistor, Inductor, and Capacitor. All these three elements limit the current flow but in a dissimilar manner. Since passive elements exhaust energy, they cannot amplify the electrical signals power employed to them and will always …

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