## Electric Energy Used for Lighting in the United States Every Year

Do You know How much electricity is used for lighting in the United States? The United States Energy Information Administration (EIA) approximates about 279 billion kilowatt hours of electric energy were utilized to lighten up the residential sector and the commercial sector in 2016 in the United States which was …

## Voltage Regulation of Transformer at Unity, Lagging, and Leading Power Factor

Voltage Regulation of Transformer The voltage regulation of a transformer can be described as the change in the secondary voltage as the current varies from full load to no load while keeping the primary voltage constant. Generally, a transformer is utilized to supply loads that operate at basically constant voltage. …

## Equivalent Circuit of Transformer Referred to Primary and Secondary Side

Non-Ideal Transformer Characteristics A non-ideal transformer is illustrated in Fig.1. It can be described by the following characteristics: 1.     There is a flux leakage which means that not all of the flux produced by one winding will link the other winding. 2.     Primary and Secondary windings have resistances which means …

## Voltaic Cell Equivalent Circuit | Voltaic Cell Example

Primary and Secondary Cells The simple voltaic cell is classiﬁed as a primary cell. Primary cells can supply current until the negative electrode is completely dissolved, the electrolyte is exhausted, or perhaps until polarization renders the cell useless. A secondary cell, on the other hand, can be recharged. That is, …

## Voltaic Cell | Working and Construction of Voltaic Cell

Voltaic Cell Definition A voltaic cell consists basically of two different metal plates immersed in an acid solution. The action of the acid removes electrons from one plate and accumulates them on the other plate. In this way, a potential difference is produced between the two plates, and a current …

## Transformer Working Principle | How Transformer Works

The transformer is an essential element of an electrical power system. It is among the primary reasons for the far-flung utilization of AC power systems. It makes power generation possible at the most efficient voltage, transmission system and distribution at the most economic voltage levels, and electric power usage at …

Transformers Questions and Answers for Interview 1. What are the following relationships in an ideal transformer? a. Turns ratio and voltage ratio? The turn’s ratio is the same as the voltage ratio. $\frac{{{N}_{1}}}{{{N}_{2}}}=\frac{{{V}_{1}}}{{{V}_{2}}}$ b. Voltage ratio and the current ratio? The current ratio is the inverse of the voltage ratio. …

## RLC Parallel Circuit Problems with Solutions

Parallel RLC Circuit Example Problems with Solutions These questions are related to Parallel RLC Circuit which is covered in detail here: Parallel RLC Circuit 1. What are the three characteristics of the voltage across each branch of a parallel RL circuit? The voltage across each of the branches is the same …

Electrical Relay Questions These questions are related to Solid State Relay Timers, ON and OFF Delay Timers, Magnetic Motor Contactors and Starters which are covered in detail here: ON Delay Timer and OFF Delay Timer Solid State Timers Motor Contactors and Starters Electromagnetic relays operate in which way? An electromechanical …

Inductor Questions These questions are related to Capacitor Circuit, Capacitor Connections, Capacitive Reactance, and RC Circuit Time Constant which are covered in detail here: Inductors in Series | Inductors in Parallel Inductive Reactance RL Circuit Time Constant   1. Inductance is defined as what? Inductance is the ability of a …

## Basic Electronics Questions and Answers

Electronics Questions and Answers 1. A diode has a certain characteristic when operating. Explain this characteristic. The main operating characteristic of a diode is that it allows current in one direction and blocks current in the opposite direction. 2. What must the conditions be for a LED to emit light? …

Capacitor Questions These questions are related to Capacitor Circuit, Capacitor Connections, Capacitive Reactance, and RC Circuit Time Constant which are are covered in detail here: Capacitor in Series | Capacitors in Parallel Capacitive Reactance RC Circuit Time Constant   1. Define capacitance. The ability of an electric circuit or component …

## AC Fundamentals Solved Problems

AC Fundamentals Questions What is the definition of a generator? A generator is a machine which converts mechanical energy to electrical energy. What is the definition of an alternator? An AC generator is also called an alternator. With a six pole alternator spinning at 1200 rpm, what would the frequency …