Volt - Standard Unit Of Electromotive Force (EMF) / Potential Difference

Volt – Standard Unit Of Electromotive Force (EMF) / Potential Difference

The standard unit of electromotive force (EMF) or potential difference. An accumulation of static electric charge such as an excess or shortage of electrons is always, associated with a voltage. There are other situations in which voltages exist. Voltage is generated at a power plant and produced in an electrochemical reaction, and caused by light […]

periodic waveform

What is AC Waveforms?

Alternating current, (AC) is current that changes direction cyclically, passing first in one direction then in the other through a circuit. Such alternating currents are produced by generators and other such voltage sources whose polarities alternate between a positive direction and a negative direction rather than being fixed in a constant direction as with DC […]

What is Conventional Current and Electron Current ?

In this circuit the arrow indicates the direction of current flow. If the arrow points in the same direction of the positive charge carriers (conventional current flow) the numeric vale of the current receives a positive sign, +2A. If current flow is opposite (electron flow), the numerical value receives a minus sign, -2A. The sign […]

voltage polarity

What is Voltage Polarity?

If point ‘a’ is positive with respect to point ‘b’ moving a positive charge around the closed circuit from ‘a’ to ‘b’ or negative charge from b to a requires work. The difference between the two points is the voltage polarity. This voltage polarity is indicated by a positive sign ( + ) at point […]

What is AC/DC Voltage?

A constant voltage is called DC voltage. Voltage that varies sinusoidally with time is called AC voltage. A voltage source such as a battery or solar cell provides a constant DC voltage for example 12 VDC. A voltage source such as an alternator or generator provides an alternating AC voltage, so for example 240 VAC.

What is Potential Difference?

When two positive charges or two negative charges are got near to each other they repel each other while the positive and negative charge are attracted to each other. Then the charged particle has the ability to do work. The ability of a charged particle to do work is called an Electric Potential. “The potential […]

What is Electric Current?

Electric current is the flow of the electric charge in the form of free electrons. The current is measured by the number of free electrons passing the particular point within the circuit per second. Therefore the flow of charge per unit second describe the amount of electric current. When the charge moves at the rate […]

What is Unit Of Charge

The unit of charge is the Coulomb, C. The symbol of electric charge is Q. The charge of one electron is given as: 1.6×10-19, so one Coulomb of charge is equal to 1/ 1.6×10-19 or 6.25×1018 electrons. thus:- Q = 1 Coulomb = charge of 6.25 x 1018 Electrons

Electrical Safety Precaution

Electrical safety Precaution is very important for electric equipment as well as for operator. If the information on electrical safety is not observed either at all to the extent necessary, electric shock, fire and serious personal injury or death may occur. Prior to switching on the product, always ensure that the nominal voltage setting on […]

Tips To Reducing Static Electricity | Electrostatic Charge

Tips To Reducing Static Electricity | Electrostatic Discharge

You can bet that most of the electronic projects you want to build contain at least some components that are susceptible to damage from electrostatic discharge. You can take a number of simple steps to prevent exposing your projects to the dangers of electrostatic discharge: Use An Anti-Static Mat An anti-static mat acts to reduce […]

How Electricity Becomes Electronics

How Electricity Becomes Electronics

When you need to use electricity to make something work such as a boom box, you’ve entered the world of electronic gadgets. No doubt you’re eager to start making your own electronic gadgets. We cover the basics of how electronics and gadgets interact in the following sections. Creating A Simple Circuit Take a battery a […]

What is Grounding? – Ground Your Tools

It is critical for facilities to have grounded electrical systems, so that in the event of a lightning strike or utility the over voltage, current will find a safe path to earth. To ensure a reliable connection to the earth, the International Electrical Testing Association specifies the ground electrode testing every three years. The tools […]

Which Came First Voltage Or Current?

Batteries produce a voltage that drives an electric current. Generators at dams drive a current that produces a voltage. Which comes first? This is like asking yourself the well known question about the chicken and egg. Voltage, currents and conductors all work together. If there is a voltage applied across a conductor, electric current flows. […]

Controlling Electrical Hazards of Alternating Current

The vast majority of hobby electronics projects run on batteries. Simple enough, but some projects need more current or higher voltages than batteries can easily provide. Instead of building a power supply that converts household AC current to a DC voltage for your project, you can make things much safer for yourself by using a […]

How To Deal With Static Discharge, Zaps And Shocks

One type of everyday electricity that is dangerous to both people and electronic gizmos is static electricity. They call it static because it’s a form of current that remains trapped in some insulating body, even after you remove the power source. With conventional AC and DC current, static electricity disappears when you turn off the […]

Page 1 of 212