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Everyone use electricity to power our homes, business, televisions , lights, etc. With AC or “Alternating Current” , the current alternates in direction on a regular basis.  This has shown to be a better way for providing electricity than “Direct Current” Electricity or DC Electricity.  This is because the voltages can be changed if needed. Using AC electricity in homes also allows for other devices to be used

While direct current (DC) electricity flows in one direction through a wire, AC electricity alternates its direction in a back-and-forth motion. The direction alternates between 50 and 60 times per second, depending on the electrical system of the country.  This change happens in a cycle.  Each cycle is also called a Hertz (Hz).

AC electricity is created by an AC electric generator, which determines the frequency. What is special about AC electricity is that the voltage can be readily changed, thus making it more suitable for long-distance transmission than DC electricity. But also, AC can employ capacitors and inductors in electronic circuitry, allowing for a wide range of applications.

We say AC electricity instead of simply saying AC, since that is also the abbreviation for air conditioning. You need to be specific to avoid confusioning issues and to avoid any misunderstandings while discussing a topic like this.

With an AC generator, a slightly different configuration alternates the push and pull of each generator terminal. Thus the electricity in the wire moves in one direction for a short while and then reverses its direction when the generator armature is in a different position.

The charge at the ends of the wire alternates between negative (−) and positive (+). If the charge is negative (−), that pushes the negatively charged electrons away from that terminal. If the charge is positive (+), the electrons are attracted in that direction.

AC electricity alternates back-and-forth in direction 50 or 60 times per second, according to the electrical system in the country. This is called the frequency and is designated as either 50 Hertz (50Hz) or 60 Hertz (60Hz).

The regular back-and-forth motion of the electrons in a wire when powered by AC electricity is periodic motion, similar to that of a pendulum. Because of this periodic motion of the electrons, the voltage and current follow a sine waveform, alternating between positive (+) and negative (−), as measured with a voltmeter or multimeter.

There are distinct advantages of AC over DC electricity. The ability to readily transform voltages is the main reason we use AC instead of DC in our homes.  The major advantage that AC electricity has over DC electricity is that AC voltages can be readily transformed to higher or lower voltage levels, while it is difficult to do that with DC voltages.  Since high voltages are more effecient for sending electricity great distances, AC electricity has an advantage over DC. This is because the high voltages from the power station can be easily reduced to a safer voltage for use in the house. Changing voltages is done by the use of a transformer. This device uses properties of AC electromagnets to change the voltages.

AC electricity also allows for the use of a capacitor and inductor within an electrical or electronic circuit. These devices can affect the way the alternating current passes through a circuit. They are only effective with AC electricity. A combination of a capacitor, inductor and resistor is used as a tuner in radios and televisions.

It’s important to save electricity because electric companies often produce electricity by burning fossil fuels such as coal, oil, and natural gas. The burning of fossil fuels contributes to global warming and pollutes the air.

 
Energy Saving Tips to Use Throughout the Year to help Reduce Electricity costs :

1.   Be sure to turn off lights when you leave a room.
2.   Turn off machines when you leave a room (examples include TV’s, computers, radios, stereos, video games, VCR’s, and DVD players).
3.   When you go away on a trip, be sure to unplug these same machines because they have stand-by functions that consume  electricity even when they are turned off.
4.   Fill your dishwasher efficiently and limit the number of times you run it.
5.   Don’t put furniture and other things in front of heating and air conditioning vents.
6.   Keep doors and windows closed when heat or air conditioning is on.
7.   Put in a programmable thermostat which will keep your house at the right temperature day and night.  Programmable thermostats can reduce cooling and heating bills up to 10% because they lower the heat or raise the air conditioning when you are not at home.
8.   Check how much electricity your water heater uses. If it uses more than other models of water heaters, replace it with a more efficient one.
9.   Put insulation around the pipes going in and out of your water heater.  If you have an older water heater, put an insulated blanket around it.
10.   If you will be out of town for more than a couple days, turn off your water heater.
11.   About once a year, drain one gallon of water from the faucet at the bottom of your water heater.  This gets rid of the sediment in the water which reduces the energy efficiency of your water heater.
12.   Change your furnace filter at least once a year or even more.  Filters get clogged up with dust and dirt that circulate in a house. This means that air has a more difficult time passing through the filter, and then your furnace has to work a lot harder in order to heat the house.
13.   Take a look at the insulation in your attic.  Heat rises, which means that warm air rises into your attic. If you don’t have good enough insulation, heat will be wasted.  Insulation should be 6 inches to 1 foot thick.
14.   Close doors and vents in rooms you are not using.
15.   Hold a ribbon or feather up to windows and doors to see if there are any drafts.  If there are, put in weather stripping or caulking to keep the outside air out and to keep the air conditioning or heating in.
16.   Turn off the water when you are brushing your teeth and take shorter showers.  This will not only save water, but it will also save the electricity that it takes to pump and heat the water. 
17.   Make use of daylight hours and do not turn on lights and lamps.
18.   Use one large light bulb instead of a few small ones.  One 100-watt light bulb uses less energy and gives off more light than two 60-watt bulbs.
19.   Use fluorescent light bulbs because they use 75% less energy and last longer than incandescent light bulbs.
20.   Use light bulbs that are low in wattage in areas of your house where you don’t need bright light.
21.   Make sure that outdoor lighting is turned off during the day.  Use motion-detectors lights or timer switches.
22.   Decide what you want from the refrigerator or freezer before you open them so you don’t waste electricity by standing there looking inside and keeping the door open.
23.   Vacuum the coils of your refrigerator every few months in order to lower your energy bill and to keep the condenser working better.
24.   Before putting hot foods into the refrigerator, cool them to room temperature (unless the recipe tells you not to do this).
25.   Cook several food dishes in the oven at the same time.
26.   Keep the oven door closed until the food is done cooking.
27.   Defrost food before you bake or microwave it.  This uses 1/3 less energy than if you baked food that was still frozen.
28.   Wash full loads of clothing instead of smaller ones.  Use the coolest water possible for washing and rinsing the clothes.
29.   Clean the lint filter of your dryer after every load.
30.   Dry full loads of clothes.
31.   Dry one load right after another because this uses less energy since the dryer is already hot.
32.   Be sure to stop the dryer as soon as the clothes are dry.

Summer Tips:

Keep your blinds, drapes or shades closed during the day.

Use ceiling fans or windows fans instead of air conditioning.  Ceiling and window fans use much less electricity.

Only use air conditioning when it is really hot outside.

Turn off your air conditioning if you will be gone from home for a long time.

Clean or replace your air conditioning filters every month (in both central and window air conditioners).

Turn the thermostat up a few degrees when you have the air conditioning on.  74 degrees is very comfortable and you are saving up to 5% on your electric bills for each degree of temperature change.

Plant trees in your yard because they help shade your house in the summer and keep your house cooler.

If you can, shade your air conditioning unit.  If your unit is in the bright sun, it will use up to 5% more energy than if it was in the shade

Winter Tips:

1.   Keep your thermostat at or below 68 degrees. If you are cold, put on a sweater or sweatshirt.  Remember, you are saving up to 5% on your electric bill for every degree of temperature change.
2.   On sunny winter days, open your curtains, drapes, and blinds  to let the sunshine in to warm up your house.
3.   Put clear plastic over some of your windows.  This will work like insulation and prevent cold air from getting in your house.
4.   Put caulking around window frames and doors from the inside.
5.   Make sure windows and doors close well so they do not let any cold air in.
6.   Repair any broken or cracked window glass.
7.   Plant trees in your yard because trees break the cold winter wind before it reaches your house.
8.   If you have a fireplace, make sure you have a tight-fitting damper and keep it closed when you are not using the fireplace.