Top Questions on ELECTRICITY


Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. In early days, electricity was considered as being not related to magnetism. Later on, many experimental results and the development of Maxwell’s equations indicated that both electricity and magnetism are from a single phenomenon: electromagnetism. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others.

The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field.

When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb’s law. Thus, if that charge were to move, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a unit of positive charge from an arbitrarily chosen reference point to that point without any acceleration and is typically measured in volts.


Electricity is at the heart of many modern technologies, being used for:

electric power where electric current is used to energise equipment;

electronics which deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies.

Electrical phenomena have been studied since antiquity, though progress in theoretical understanding remained slow until the seventeenth and eighteenth centuries. Even then, practical applications for electricity were few, and it would not be until the late nineteenth century that electrical engineers were able to put it to industrial and residential use. The rapid expansion in electrical technology at this time transformed industry and society, becoming a driving force for the Second Industrial Revolution. Electricity’s extraordinary versatility means it can be put to an almost limitless set of applications which include transport, heating, lighting, communications, and computation. Electrical power is now the backbone of modern industrial society.


Is all electricity the same?


Flowing Charges. As we mentioned at the beginning of this tutorial, electricity is defined as the flow of electric charge. Charge is a property of matter–just like mass, volume, or density. … Both electrons and protons carry the same amount of charge, just a different type.

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Can electricity be destroyed?

Yes, electrical energy does exist. … No charges of electricity are gained or lost as the charges circulate within the wires, yet batteries create electrical energy from chemical energy, and light bulbs destroy[1] the electrical energy as they convert it into light.


Is electricity cheaper at night?


Electricity used during the peak hours of the late afternoon will be more expensive than electricity used in the early morning. … Some suppliers now offer plans with free electricity on nights or weekends. You could save significantly by doing household chores at times when electricity is cheaper according to your plan.


Is light a electricity?

Light is an oscillating electric and magnetic field, so it is electrical and magnetic. … Firstly the interaction with electric charge and secondly the interaction with magnets. Light does not carry any charge itself, so it does not attract or repel charged particles like electron


Is it cheaper to use gas at night?

Generally, using oil for hot water is cheaper, owing to the higher average cost of electricity. However, if you’re able to use a lower rate electricity tariff (such as Economy 7, where power is cheaper at night) at the right time, it can work out more cost-effective


What is the difference between electricity and lightning?

Lightning is a massive discharge of static electricity, very powerful, very short duration, but still a big flood of electrons moving from the ground to the sky. … So Lightning is just one particular form and observation of Electricity in action


How quickly does electricity travel?

Light travels through empty space at 186,000 miles per second. The electricity which flows through the wires in your homes and appliances travels much slower: only about 1/100 th the speed of light.


Can electricity travel through vacuum?

Electricity is a flow of electrons and can flow across a vacuum. However, a force is needed for electron to move across the vacuum because vacuum has huge resistance. … Even with no heat, electrons can travel through a vacuum, if the difference in potential across the gap is high enough.


Is lightning a plasma or electricity?

Plasma is when the electrons are “freed” from their host atoms for a short time, due to high temperatures. Fire is plasma, it responds to electric fields. Lightning is also plasma. When a column of electrons flows from sky to ground, the air that it passes through lights up with energy.

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How powerful is a lightning bolt?

Originally Answered: How powerful is a lightning bolt? … Support Wikipedia : “An average bolt of negative lightning carries an electric current of 30,000 amperes (30 kA), and transfers 15 coulombs of electric charge and 500 megajoules of energy. Large bolts of lightning can carry up to 120 kA and 350 coulombs


Does lighting go up or down?

The answer is both. Cloud-to-ground lightning comes from the sky down, but the part you see comes from the ground up. A typical cloud-to-ground flash lowers a path of negative electricity (that we cannot see) towards the ground in a series of spurts. Objects on the ground generally have a positive charge.


Does plasma exist naturally on Earth?

Plasma Basics. Plasmas are a lot like gases, but the atoms are different, because they are made up of free electrons and ions of an element such as neon (Ne). You don’t find naturally occurring plasmas too often when you walk around. They aren’t things that happen regularly on Earth.


Which is an example of a plasma that occurs in nature?

Neon signs and lightning are examples of partially ionized plasma. The Earth’s ionosphere is a plasma and the magnetosphere contains plasma in the Earth’s surrounding space environment. The interior of the Sun is an example of fully ionized plasma, along with the solar corona and stars


What color Lightning is the strongest?

Lightning comes in every color of the rainbow (Red, Yellow, Green, Cyan, Blue, and Violet, to name a few). It’s almost always white, but often it’s tinged with another color around the edges. The three most common colors, aside from white, are blue, yellow, and violet


What is the rarest color of lightning?

Red lightning within a cloud indicates the presence of rain. Yellow or orange lightning occurs when there is a large concentration of dust in the air. White lightning is a sign of low humidity or a little amount of moisture in the air. White is the color of lightning that most often ignites forest fires.


Is there blue lightning?

The distinctive blue-white color of lightning is caused by light emitted as the electrons drop back to their original energy states. Seen from above, lightning storms also produce less well-known emissions of blue or red light above the clouds, known as jets and sprites.


Is purple lightning bad?

Lilac or purple-tinted lightning is usually the most commonly observed colour. It is often caused by precipitation, so the observation of it most likely means that the thunderstorm generating it will be a high-precipitation storm. Lilac lightning is also rumoured to produce louder thunder, though this is disputed

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What is the speed of electricity in miles per hour?

Answer 3: Light travels through empty space at 186,000 miles per second. The electricity which flows through the wires in your homes and appliances travels much slower: only about 1/100 th the speed of light


Can lightning strike the same place twice?

TRUTH: The old saying that ‘lightning never strikes the same place twice’ is another myth that any veteran storm observer or researcher has seen nature defy. Lightning can strike any location more than once. In fact, given enough time, it is actually inevitable.


Can lightning pink?

In snowstorms, where it is somewhat rare, pink and green are often described as colors of lightning. Haze, dust, moisture, raindrops and any other particles in the atmosphere will affect the color by absorbing or diffracting a portion of the white light of lightning.


Can you survive a wormhole?

It is highly unlikely that you could enter a wormhole and survive. A wormhole is created by gravity so great that it bends space until you pinch the universe and come out on the other side. … Some theories suggest wormholes may not even exist in the present but in the past or future


Is it safe to use WiFi during a thunderstorm?

Generally No. Using a hand held device is harmless during a Thunderstorm. There is always a “However”. If you are in your Bedroom say and the Modem supplying your WiFi is in your room with you and Lightning strikes your Power line then you could absolutely be injured


What is the hottest fire Ever?

Hottest temperature. Dicyanoacetylene, a compound of carbon and nitrogen with chemical formula C4N2 burns in oxygen with a bright blue-white flame at a temperature of 5,260 K (4,990 °C; 9,010 °F), and at up to 6,000 K (5,730 °C; 10,340 °F) in ozone.


Does lightning make a sound?

Thunder is the sound caused by lightning. Depending on the distance from and nature of the lightning, it can range from a sharp, loud crack to a long, low rumble (brontide). The sudden increase in pressure and temperature from lightning produces rapid expansion of the air surrounding and within a bolt of lightning.