what does it mean to say that electricity is a secondary energy source

Electricity is the flow of electric ability or charge. It is a secondary free energy source which means that we get it from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power and other natural sources, which are called master sources. The energy sources we use to make electricity can be renewable or non-renewable, but electricity itself is neither renewable or non-renewable.

Electricity is a basic office of nature and it is 1 of our most widely used forms of free energy. Many cities and towns were built alongside waterfalls (a primary source of mechanical energy) that turned water wheels to perform work. Before electricity generation began slightly over 100 years ago, houses were lit with kerosene lamps, nutrient was cooled in iceboxes, and rooms were warmed past wood-burning or coal-called-for stoves. Outset with Benjamin Franklin's experiment with a kite one stormy nighttime in Philadelphia, the principles of electricity gradually became understood. Thomas Edison helped change everyone's life — he perfected his invention — the electric light bulb. Prior to 1879, straight current (DC) electricity had been used in arc lights for outdoor lighting. In the late-1800s, Nikola Tesla pioneered the generation, manual, and use of alternate current (AC) electricity, which can be transmitted over much greater distances than direct electric current. Tesla's inventions used electricity to bring indoor lighting to our homes and to power industrial machines.

Despite its great importance in our daily lives, nigh of us rarely stop to think what life would be similar without electricity. Yet like air and water, nosotros tend to take electricity for granted. Everyday, we utilize electricity to do many jobs for usa — from lighting and heating/cooling our homes, to powering our televisions and computers. Electricity is a controllable and convenient form of energy used in the applications of heat, calorie-free and power.

THE SCIENCE OF ELECTRICITY

In order to understand how electrical charge moves from one atom to another, we need to know something almost atoms. Everything in the universe is made of atoms—every star, every tree, every creature. The human body is made of atoms. Air and water are, too. Atoms are the edifice blocks of the universe. Atoms are so small that millions of them would fit on the caput of a pin.

Atoms are made of fifty-fifty smaller particles. The centre of an atom is called the nucleus. It is made of particles called protons and neutrons. The protons and neutrons are very small, but electrons are much, much smaller. Electrons spin around the nucleus in shells a corking altitude from the nucleus. If the nucleus were the size of a tennis brawl, the atom would be the size of the Empire State Building. Atoms are more often than not empty space.

If yous could see an atom, it would wait a little similar a tiny center of balls surrounded by giant invisible bubbles (or shells). The electrons would be on the surface of the bubbles, constantly moving to stay as far away spinning and from each other every bit possible. Electrons are held in their shells by an electric forcefulness.

The protons and electrons of an atom are attracted to each other. They both carry an electrical accuse. An electric charge is a force within the particle. Protons have a positive charge (+) and electrons have a negative charge (-). The positive charge of the protons is equal to the negative charge of the electrons. Reverse charges attract each other. When an atom is in rest, it has an equal number of protons and electrons. The neutrons carry no charge and their number tin vary.

The number of protons in an atom determines the kind of atom, or element, it is. An element is a substance in which all of the atoms are identical (the Periodic Table shows all the known elements). Every cantlet of hydrogen, for example, has 1 proton and 1 electron, with no neutrons. Every atom of carbon has half dozen protons, six electrons, and 6 neutrons. The number of protons determines which chemical element information technology is.

Electrons commonly remain a abiding distance from the nucleus in precise shells. The shell closest to the nucleus can concord two electrons. The next beat out can hold up to eight. The outer shells cans hold even more than. Some atoms with many protons can accept as many as seven shells with electrons in them.

The electrons in the shells closest to the nucleus have a stiff force of attraction to the protons. Sometimes, the electrons in the outermost shells do not. These electrons tin can be pushed out of their orbits. Applying a force tin make them move from one atom to another. These moving electrons are electricity.

STATIC ELECTRICITY

Electricity has been moving in the earth forever. Lightning is a form of electricity. Information technology is electrons moving from 1 cloud to another or jumping from a cloud to the ground. Have you ever felt a shock when you lot touched an object after walking across a rug? A stream of electrons jumped to you from that object. This is called static electricity.

Have yous ever made your pilus stand straight up by rubbing a balloon on it? If and so, you rubbed some electrons off the airship. The electrons moved into your pilus from the balloon. They tried to get far away from each other past moving to the ends of your hair.

They pushed against each other and made your hair move—they repelled each other. Just as reverse charges attract each other, like charges repel each other.

MAGNETS AND ELECTRICITY

In most objects, all of the forces are in residuum. Half of the electrons are spinning in one direction; one-half are spinning in the other. These spinning electrons are scattered evenly throughout the object.

Magnets are different. In magnets, well-nigh of the electrons at one terminate are spinning in 1 management. Most of the electrons at the other end are spinning in the opposite direction.

Bar Magnet

This creates an imbalance in the forces between the ends of a magnet. This creates a magnetic field around a magnet. A magnet is labeled with North (N) and South (S) poles. The magnetic force in a magnet flows from the North pole to the South pole.

Similar poles of magnets (N-N or 5.5) repel each other.

Have you ever held two magnets close to each other? They don't human activity like most objects. If you lot try to push button the S poles together, they repel each other. Ii North poles also repel each other.

Plough one magnet around and the Northward (N) and the South (S) poles are attracted to each other. The magnets come together with a strong strength. Just similar protons and electrons, opposites attract.

Opposite! pales of magnets (MS) concenter each other

These special properties of magnets can be used to brand electricity. Moving magnetic fields can pull and push electrons. Some metals, similar copper have electrons that are loosely held. They tin be pushed from their shells by moving magnets. Magnets and wire are used together in electric generators.

BATTERIES PRODUCE ELECTRICITY

A battery produces electricity using two dissimilar metals in a chemic solution. A chemical reaction between the metals and the chemicals frees more than electrons in one metal than in the other. Ane end of the battery is attached to i of the metals; the other end is attached to the other metallic. The end that frees more electrons develops a positive charge and the other terminate develops a negative charge. If a wire is attached from one end of the battery to the other, electrons flow through the wire to balance the electric accuse. A load is a device that does work or performs a job. If a load—such as a lightbulb—is placed forth the wire, the electricity can do work as it flows through the wire. In the picture above, electrons catamenia from the negative stop of the battery through the wire to the lightbulb. The electricity flows through the wire in the lightbulb and dorsum to the battery.

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