## Moore’s Law – What is it?

Moore’s Law refers to the observation that the number of transistors in an integrated circuit (IC) doubles approximately every 2 years. It is often cited as an explanation for the exponential growth of technology, sometimes even being coined as the ‘law of exponential growth’. Gordon Moore co-founder of Intel discovered that since the invention of … Read more

## Types of Resistors

A resistor is a passive component in a circuit which provides resistance to the flow of current. There are many different types of resistors. These resistors vary in their construction, power dissipation capacities, and tolerance to various parameters (such as temperature and light). The types of resistors include: Carbon Composition Resistor Thermistor Wire Wound Resistor … Read more

## Electric Power Single and Three Phase Power Active Reactive Apparent

Complex Power It is very conceptual and essential to understand. For establishing the expression of complex power, we have to first consider a single phase network that’s voltage and current can be represented in complex form as V.ejα and I.ejβ. Where α and β are angles that voltage vector and current vector subtend with respect … Read more

## Voltaic Cell Basic Construction and Working of Voltaic Cell

A simple voltaic cell is made by immersing one zinc plate and one copper plate inside a water diluted sulfuric acid solution. As shown in the figure, if the copper plate and zinc plate are connected externally with an electrical load, an electric current starts flowing from copper plate to zinc plate through the load. … Read more

## What is Resistor?

Definition of Resistor A resistor is a passive element in a circuit which provides resistance to the flow of current. Resistance is a measure of the opposition to the flow of current in a resistor. The larger a resistor’s resistance, the greater the barrier against the flow of current. There are many different types of … Read more

## Alternating Current Definition Measurements and Advantages of AC

Definition of Alternating Current Alternating current changes its direction at a periodic interval. The magnitude of the current may or may not change at every instant but the current must alter its direction periodically. Alternating current is represented by a periodic function. The waveform of the current may sinusoidal, square, triangular or sawtooth type etc. … Read more

## What is Electricity and How Electricity is Generated and Used

There are some inventions which charged the human civilization. The first invention was the wheel, the second invention was electricity, the third invention was telecommunication, and the fourth invention was the computer. We will discuss here the basic introduction of electricity. Each substance in this universe is made of plenty of atoms and each atom … Read more

## Magnet and Magnetism

Magnet and Magnetism are utilized for operating all kinds of electrical machines. Hence we should have a deep concept of magnets and magnetism. The property of a magnet is called magnetism. The magnet is an element which can attract magnetic materials. Normally a magnet can attract iron, cobalt, steel, nickel. If a magnetic piece is … Read more

## Electrical Impedance

The current lags 90° (electrical) in respect of the applied voltage in a purely inductive circuit. The current leads 90° (electrical) in respect of the applied voltage in a purely capacitive circuit. The current does not lag as well as not lead in respect to the applied voltage in a purely resistive circuit. In a … Read more

## Permittivity and Relative Permittivity or Dielectric Constant

When we place two electrically charged bodies nearby they will experience a force among them. This force may either be attractive or be repulsive depending on the nature of the charge of two bodies. Two like charged bodies repel each other and two unlike charged bodies attract each other. The value of force acting on … Read more