Understanding Electricity

Understanding Electricity

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Electricity is related to magnetism, Understanding Electricity both being part of the phenomenon of electromagnetism, as described by Maxwell&39;s equations. Resellers include electricity utility companies, competitive power providers and electricity marketers. The characteristics of current electricity are opposite to those of static electricity. Fear not, however, this tutorial will give you the basic understanding of voltage, current, and resistance and how the three relate to each other. The process of forcing electrons to move through a material creates electricity. This is a measurement of the amount of energy you use during the billing period. · In its simplest terms, electricity is the movement of charge, which is considered by convention to be, from positive to negative. Click the link for your electric company below to view the appropriate Understanding Electricity Usage and Costs brochure:.

In the documentation for an LED, there will always be a &92;&92;"current rating&92;&92;". The wholesale market refers to the buying and selling of power between the generators and resellers. We Understanding Electricity can think of the amount of water flowing through the hose from the tank as current.

Here&39;s what our device looks like all put together. Fully understanding the energy charges and fees on your electric or natural gas bills each month is an important part of keeping your energy budget under control. For basic science on &39;what is electricity? For this example, we have a 9 volt battery and a red LED with a current rating of 20 milliamps, or 0. Understanding the Differences Between PJM&39;s Markets (PDF) Wholesale Market. Electric charge refers to a fundamental property of matter that even physicists don’t totally understand. Even the lightning in the sky, while visible, is not truly the energy exchange happening from the clouds to the earth, but a reaction in the air to the energy passing through it.

If the goal is to reduce or lower your electricity bill, the first step is understanding how to read your bill. The fundamental laws of electricity are mathematically complex. See full list on gridpoint.

LEDs are fragile and can only have a certain amount of current flowing through them before they burn out. 241*10^18 electrons (1 Coulomb) per second passing through a point in a circuit. We can use Ohm&39;s Law in the exact same way to determine the reistor value that will give us the desired current value:. The pressure at the end of the hose can represent voltage. The first step in understanding your home&39;s circuits is to know how basic electricity works. The LED introduces something called a &92;&92;"voltage drop&92;&92;" into the circuit, thus changing the amount of current running through it.

30 per kWh or more. Consumption is measured in kWh (kilowatt hours). electric industry. A standard generator performs this process. Electricity, simply put, is the flow of electric current along a conductor. This is resistance.

If we drain our Understanding Electricity tank a certain amount, the pressure created at the end of the hose goes down. Long before anyone heard the word electricity, people had seen lightning and experienced shocks from electric fish. We can think of this as decreasing voltage, like when a flashlight gets dimmer as the batteries run down. Atoms of metal are made up of free electrons, which freely move from one atom to the next.

When electricity gathers in one place it is known as static electricity (the word static means something that does not move); electricity that moves from one place to another is called current electricity. And because of this we are able to use the most mobile of charges, the. Electricity is the movement of electrons. Electricity moves through any metal conductor, such as a wire or the metal contacts and other components inside a switch or receptacle. In this analogy, charge is represented by the water amount, voltage is represented by the water pressure, and current is represented by the water flow. Why should you understand electricity Current and amperes Potential difference and volts Relationship between potential difference and current Sources of potential difference Concept of resistance Ohms Law DC and AC current. · Humans and electricity. At first, these concepts can be difficult to understand because we cannot &92;&92;"see&92;&92;" them.

· Today, our electricity needs are more sophisticated and the strain on the grid is higher than ever. Voltage is represented in equations and schematics by the letter &92;&92;"V&92;&92;". Current is measured in Amperes (usually just referred to as &92;&92;"Amps&92;&92;").

This is the maximum amount of current that can flow through the particular LED before it burns out. An electrical phenomenon is caused by flow of free electrons from one atom to another. · Understanding Electricity Usage and Costs When you know how much electricity your household appliances use, you can better manage your overall energy use and control your monthly electric bill.

) into electrical energy so that we can interpret what’s going on electronically. However, in this experiment we are simply trying to protect the LED from over-current, so we will neglect the current characteristics of the LED and choose the resistor value using Ohm&39;s Law in order to be sure that the current through the LED is safely under 20mA. When beginning to explore the world of electricity and electronics, it is vital to start by understanding the basics of voltage, current, and resistance. Harnessing its energy is both the domain of imagined sorcery and humdrum, everyday life -- from Emperor Palpatine Understanding Electricity toasting Luke Skywalker, to the simple act of ejecting the "Star Wars" disc from your PC. 5 amps: So, the current is lower in the tank with higher resistance. This difference in charge between the two points is called voltage. — Understanding Electricity — "Opposite charges attract; like charges repel" is the basic truth about electricity. This value is usually represented in schematics with the greek letter &92;&92;"Ω&92;&92;", which is called omega, and pronounced &92;&92;"ohm&92;&92;".

of the basics of electricity. Yet while the science behind the flow of electricity is very complex, the basics of electrical flow, or current, are easy to understand if you learn some key terms and functions. If we were to place a dam in it, the entire river would stop flowing, not just one side. 500 ohms is not a common value for off-the-shelf resistors, so this device uses a 560 ohm resistor in its place. Think you’re spending too much on energy? It will also show you other information like green percentage, base (monthly) charges and an early termination (cancellation) fee. Consider again our two water tanks, one with a narrow pipe and one with a wide pipe.

The more water in the tank, the higher the charge, the more pressure is measured at the end of the hose. Knowing where and when and how efficiently power is being used at every facility is the first and most essential requi. VOLTAGE is like the pressure that pushes water through the hose. Atoms are the building blocks of the universe. Electricity is a basic part of nature and it is one of our most widely used forms of energy. Let&39;s say, for example, that we have a circuit with the potential of 1 volt, a current of 1 amp, and resistance of 1 ohm. Electrical energy can change into light energy when it flows through a lamp. Your electric consumption charge is easy to understand and calculate.

. · Electricity is a type of energy that can build up in one place or flow from one place to another. An Electricity Facts Label (EFL) is a document describing the details of a plan. They all operate using the same basic power source: the movement of electrons. With this setup, instead of having to choose the resistor for the LED, the resistor is already on-board with the LED so the current-limiting is accomplished without having to add a resistor by hand. By knowing this simple law, you understand the concept that is the basis for the analysis of any electrical circuit!

This is called Ohm&39;s law. Why is electricity impossible to understand? The majority of equations and laws for analyzing circuits can be derived directly from Ohm&39;s Law. However, if you don’t know exactly where and when that power is being used or how efficiently it’s being used (maybe because you aren’t metering the main load and submetering significant power consuming equipment at your facility), then your EMS will not be able to help you manage your demand costs. To be safe, we&39;d rather not drive the LED at its maximum current but rather its suggested current, which is listed on its datasheet as 18mA, or 0. Let&39;s say now that we have two tanks, each with a hose coming from the bottom.

When describing voltage, current, and resistance, a common analogy is a water tank. Electrons create charge, which we can harness to do work. Imagine a river in a continuous loop, an infinite, circular, flowing river. What is the good electricity?

See full list on learn. Electricity is the flow of electrical energy through some conductive material. Demand is a more complex subject. If we simply connect the LED directly to the battery, the values for Ohm&39;s law look like this: So, we need a resistor value of around 500 ohms to keep the current through the LED under the maximum current rating. .

It can also change into other forms of energy. To understand what this means, we need to start simply. mistaking the high-speed chaotic vibration of electrons for the low-speed motion of electric current. kWh prices vary widely. This increases the pressure (voltage) at the end of the narrower hose, pushing more water through the tank. Electricity powers our world and our bodies.

The best material for carrying electricity is a “conductor. NOTE: LEDs are what&39;s known as a &92;&92;"non-ohmic&92;&92;" devices. , are all harnessing the movement of the electrons in order to do work. Most Energy Management Systems can help you reduce your electric consumption. .

A Documentary video describing the electricity in a different way for better understanding. We define voltage as the amount of potential energy between two points on a circuit. This means that the equation for the current flowing through the LED itself is not as simple as V=IR. Learn how to avoid the risk of electric shock. Thales of Miletus, a Greek philosopher known as one of the legendary Seven Wise Men, may have been the first human to study electricity, circa 600 B. Regards Saqer KhalilJeddah, Saudi Arabia al_sah.

It wouldn&39;t matter where in the circle the water wheel is placed, it will still slow the flow on the entire river. Electronics refers to using changing electrical properties to convey information. The higher the pressure, the higher the flow, and vice-versa. The nucleus contains positively charged particles called protons and uncharged particles called neutrons.

Understanding Electricity

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