What Type Of Electricity Do We Use In Our Homes?

AC and DC electricity have long fought for supremacy due to their ability to offer power in a variety of ways. However, it appears that the two are only now come together to live in peace.

The Differences in AC Current vs DC Current

Direct current, invented by Thomas Edison and the gold standard of America’s early excursion into the realm of electricity, is a single-direction current. Unfortunately, due to its difficulty to be easily converted into higher/lower voltages, others turned to Nikola Tesla’s AC current as an alternative. AC current, which alternates and reverses direction 60 times per second (50 in Europe), might be more easily converted to different voltages with a transformer. As the innovators competed for relevance (and royalties) in the future of America’s electrical infrastructure, the “War of the Currents” erupted. In the end, George Westinghouse teamed up with Tesla to bring air conditioning to every home in the United States. However, DC has had a revival in recent years. Why?

Application Powers the Need for AC vs DC Current

While both AC and DC currents deliver electricity, how that electricity gets to its final destination differs. What do your electronics and appliances eat?

Your home or workplace receives electricity in the form of wave-like AC current that, with the help of transformers, can change direction and voltage from higher to lower current. Corded appliances of all sizes, from your HVAC to your TV and dishwasher, eat it up in your home.

DC power provides gadgets that use a battery, such as your mobile device or smartphone, with a consistent and continuous voltage. The smooth, steady electrical current of DC power always runs in the same direction, between positive and negative terminals, just like the battery powering your child’s remote control car.

Your laptop uses a combination of both forms of electric current, starting with AC from the outlet and converting to DC via the bulky small box (a power adapter) between the outlet and the end that connects into your computer to recharge the battery. A combination of AC and DC electricity is also used in some automobiles.

The Future of AC/DC

While we can’t predict the legendary rock band’s future, we can anticipate AC and DC to continue their rivalry, albeit in a considerably more cordial manner. AC power will continue to be used to power most homes and businesses across the country. However, as LEDs, solar cells, electric vehicles, and mobile electronics become more common, breakthroughs in DC are becoming more common, with new ways for delivering and converting DC to higher and lower voltages with less electrical loss constantly being developed. Is there a way to end the “War of the Currents”? The duo collaborates in homes and businesses across the United States.

Would you like to learn more about electrical current? Mr. Handyman, a Neighborly company, has a blog on electrical troubleshooting.

In our homes, do we have a DC or an AC system?

You don’t get DC when you plug stuff into your home’s socket. AC – Alternating Current – is used in household outlets. The frequency of this current is 60 Hz, and it looks like this (if you plotted current as a function of time).

In your home, what kind of electricity do you have?

The power plant is where power companies create electricity. This electric power must be delivered to houses over long distances. Today’s electrical currents are divided into two categories: DC (Direct Current) and AC (Alternating Current). Historically, DC was the first to be utilized, and Thomas Edison popularized it. AC, on the other hand, proved to be more efficient in terms of supplying electricity to households with less power loss.

Because AC is superior at traversing greater distances, it is now employed to transmit electric power to homes. Typically, the power wires that cross your property are up to 600 volts ac. A transformer then converts the voltage to 120 volts ac or 220 volts ac (depending on which nation you live in). Electronic devices and equipment in the home can now use power.

AC current works by pushing and pulling electrons 60 times per second, therefore the current doesn’t traverse the entire length of the wire; instead, it pulses. Because electrons must travel the length of the cable in DC, it is less efficient.

Today, what kind of electricity do we use?

Thomas Edison and Nikola Tesla were involved in a war known as the War of the Currents that began in the late 1880s.

Edison invented direct current, which is current that flows in a single direction continuously, as in a battery or a fuel cell. Direct current (abbreviated as DC) was the standard in the United States throughout the early days of electricity.

However, there was a snag. It is difficult to convert direct current to higher or lower voltages.

Tesla believed that the solution to this problem was alternating current (or AC). A transformer can readily convert alternating electricity to different voltages because it reverses direction a specific number of times per second (60 in the United States).

Edison initiated a campaign to denigrate alternating current in order to protect the royalties he was getting from his direct current patents. He circulated false information about alternating current being more deadly, even going so far as to publicly electrocute stray animals to establish his point.

The World’s Fair in Chicago, commonly known as the World’s Columbian Exposition, was held in 1893, during the height of the Civil War.

General Electric bid $554,000 to electrify the fair using Edison’s direct current, but was defeated by George Westinghouse, who claimed he could power the fair using Tesla’s alternating current for only $399,000.

The Niagara Falls Power Company decided to award the contract to generate power from Niagara Falls to Westinghouse, who had licensed Tesla’s polyphase AC induction motor patent. Although others questioned whether the falls could power the entire city of Buffalo, New York, Tesla was confident that they could power not only Buffalo, but the entire Eastern United States.

The alternating current from Niagara Falls lit up Buffalo on Nov. 16, 1896. General Electric had also decided to join the alternating current bandwagon by this time.

Although it appears that alternating current has nearly decimated direct current, direct current has seen a resurgence in recent years.

Our electricity is still mostly alternating current today, although computers, LEDs, solar cells, and electric cars all use direct current. And technologies for converting direct current to greater and lower voltages are now accessible. Companies are developing ways to use high voltage direct current (HVDC) to carry electricity over great distances with less electrical loss since direct current is more stable.

As a result, it looks that the War of the Currents is far from ended. Rather than continuing the intense AC vs. DC struggle, it appears that the two currents will end up functioning in parallel in a hybrid armistice.

This article first appeared in November 2013 as part of our Edison vs. Tesla series.

How can I tell if it’s AC or DC?

If you’ve ever wondered how to identify if a power source is AC or DC, you’ll need to understand the differences between the two and pay attention to the device itself.

Examining the gadget itself can help you figure out whether you have an AC-DC or a DC-DC power supply. In most cases, the input and output data will be visible on the surface. You have an AC-DC power supply if the input is AC, and a DC-DC model if the input and output are both DC.

Why isn’t DC utilized at home?

Direct current is not utilized at home since it is more harmful than AC for the same voltage because direct current does not pass through zero. With direct current, electrolytic corrosion is more of a problem. DC inductors are more difficult to understand. Commutators, electrical switches, and brushes are required.

Why do homes utilize AC rather than DC?

As previously stated, AC stands for Alternating Current, which implies that electricity flows back and forth rather than in one direction as it does with Direct Current. The fundamental reason for choosing AC over DC was because AC is more energy efficient. Because of its ability to travel back and forth, it was able to travel longer distances. As a result, it will be able to power more households. It was also lot easier and less risky to work with, which was a major selling factor when it came to being utilized in people’s homes.

What are the four different kinds of electricity?

One of the most important inventions in our life is electricity. Everything and everything we see is powered by electricity in some way. Many people are unfamiliar with the concept of electricity. For such people, electricity is as simple as turning on the switch, waiting for the appliance to start working, then turning off the switch. When the power goes off, you realize how important it is.

There are two types of electricity: static electricity and current electricity. Static electricity is formed by rubbing two or more things together, generating friction, while current electricity is generated by the flow of electrical charge through a conductor across an electrical field.

There are two sorts of sources that are used to create electricity: renewable and non-renewable sources.

Static electricity is defined as the interaction of an equal number of protons and electrons (positively and negatively charged subatomic particles). The particles must be of opposite nature (+,-) in order for this friction to work. A ‘Non-friction’ occurs when two particles of the same sort, such as positive-positive or negative-negative, collide.

Where does alternating current (AC) come into play?

In contrast to direct current (DC), which travels solely in one direction, alternating current (AC) is an electric current that periodically reverses direction and alters its magnitude constantly over time. Alternating current is the type of electricity that is delivered to companies and homes, and it is the type of electricity that is used by consumers when they plug in kitchen appliances, televisions, fans, and electric lamps to a wall outlet. A flashlight’s battery cell is a frequent source of DC power. When modifying current or voltage, the abbreviations AC and DC are frequently used to signify simply alternating and direct.

In most electric power circuits, the most common waveform of alternating current is a sine wave, whose positive half-period correlates to positive current direction and vice versa.

The current may not truly reverse direction (as for the labeled pulsating waveform).

Different waveforms, such as triangle waves or square waves, are employed in various applications, such as guitar amplifiers. Alternating current also includes audio and radio signals transmitted by electrical lines. Information like as sound (audio) or images (video) is occasionally transmitted via modulation of an AC carrier signal in these forms of alternating current. The frequency of these currents is usually higher than that of power transmission currents.

What devices are powered by DC current?

What exactly does this imply? It implies that most DC sources will maintain a constant voltage over time. In actuality, a battery will gradually lose its charge, resulting in a decline in voltage as the battery is utilized. We can presume that the voltage is constant for most applications.


Almost all of the electronics projects and parts on SparkFun are powered by DC. DC is used in everything that is powered by a battery, connects into the wall with an AC adaptor, or is powered by a USB cable. The following are some examples of DC electronics: