Electricity is the physical flow of electrons, referred to as an electrical current. Electricity is an energy carrier that efficiently delivers the energy found in primary sources to end users, who in turn convert it into energy Services.
Electricity can be created in three ways:
The most common is through electro-magnetic conversion, where electricity is generated by moving an electric conductor, such as a wire, inside a Magnetic Field. The most practical example of this method is a Generator connected to a turbine. The turbine provides the motion required to move the conductor in the generator. This energy for motion can come from various technologies, for example wind turbines, hydropower, or the steam created from heat produced in nuclear fission or coal combustion.
Electricity can also be created through a Chemical Reaction, for example in a battery or fuel cell.
Finally, electricity can be created through solid-state conversion, wherein electricity is generated using the structure and properties of a solid. The specially constructed solid consists of different Molecules packed closely together that create an electric current when stimulated. An example of a technology that utilizes solid state conversion is a solar PV cell.
It is important to note that electricity is the same, regardless of how it is produced. Thus the electricity generated from an electromagnetic generator is the same as that from a battery. Once electricity is created it is the most versatile form of energy.
The rate at which electricity is produced is referred to as a Watt. The quantity of energy used over a certain period of time is refered to as kWh and is the measure you would see on your power bill.
Electricity is often misunderstood and unappreciated, but modern societies are vitally dependent upon it. Electricity is essential to every day lives – from lighting, heating and cooling to powering televisions, computers and cellphones.
When electricity is produced, it must be used immediately. With current technologies, It is not yet economically viable to store large quantities of electricity. For this reason, the grid must be managed, every minute of every day, to balance electricity supply with demand.
Depending on the generation source of electricity, electricity production can have significant environmental and Health impacts. Thermal generation sources produce air pollutants that can cause significant harm to human health. The production of electricity can also contribute significantly to global greenhouse gas emissions. Globally, 40% of energy-related carbon dioxide emissions are from electrical generation. Renewable sources of electricity like solar and wind produce zero direct carbon emissions but only generate electricity on an intermittent or variable basis. Hydrocarbon Resources like coal and natural gas, although carbon intensive, are the most convenient sources used to generate baseload power to meet consumer demand at any given time.
Electric intensity
Electric intensity is the strength of electric field at a point. Electric intensity at a point is defined as the force experienced per unit positive charge at a point placed in the electric field.
Potential
The potential energy for a positive charge increases when it moves against an electric field and decreases when it moves with the electric field; the opposite is true for a negative charge. Unless the unit charge crosses a changing magnetic field, its potential at any given point does not depend on the path taken.
Although the concept of electric potential is useful in understanding electrical phenomena, only differences in potential energy are measurable. If an electric field is defined as the force per unit charge, then by analogy an electric potential can be thought of as the potential energy per unit charge. Therefore, the work done in moving a unit charge from one point to another (e.g., within an electric circuit) is equal to the difference in potential energies at each point. In the International System of Units (SI), electric potential is expressed in units of joules per coulomb (i.e., volts), and differences in potential energy are measured with a voltmeter.
potential difference
The electrical potential difference is defined as the amount of work done to carrying a unit charge from one point to another in an electric field. In other words, the potential difference is defined as the difference in the electric potential of the two charged bodies.
When a body is charged to a different electric potential as compared to the other charged body, the two bodies are said to a potential difference. Both the bodies are under Stress and strain and try to attain minimum potential. The unit of potential difference is volt.
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Electricity is a form of energy that is produced by the movement of electrons. It is used to power our homes, businesses, and devices. Electricity is also used to generate Light, heat, and Sound.
Electricity is created when electrons move from one atom to another. This movement of electrons is called an electric current. The amount of current that flows through a circuit is measured in amperes (amps).
The voltage of an electric circuit is the difference in electrical potential between two points in the circuit. The voltage is measured in volts.
The resistance of an electric circuit is the opposition to the flow of current. The resistance is measured in ohms.
An electric circuit is a path that allows electricity to flow. A simple circuit consists of a power source, a conductor, and a load. The power source provides the energy that drives the current through the circuit. The conductor is the material that carries the current. The load is the device that uses the current to do work.
Electric power is the rate at which electrical energy is used. It is measured in watts.
Electric energy is the energy that is used to do work. It is measured in joules.
Electromagnetism is the interaction between Magnetism/”>Electricity and Magnetism. Electromagnetism is responsible for the attraction and repulsion of magnets. It is also responsible for the production of electricity by moving a magnet through a coil of wire.
Electromagnetic induction is the process of generating an electric current in a conductor by moving a magnet through the conductor.
waves/”>Electromagnetic Waves are waves of energy that are produced by the movement of electric and magnetic fields. Electromagnetic waves include light, radio waves, and microwaves.
Electroluminescence is the production of light by the movement of electrons. Electroluminescence is used in devices such as light-emitting diodes (LEDs) and electroluminescent displays.
An electron Microscope is a microscope that uses electrons to produce an image of a very small object. Electron microscopes can magnify objects up to 100 million times.
An X-ray is a type of Electromagnetic Wave that can pass through solid objects. X-rays are used to create images of the inside of the body.
A loudspeaker is a device that converts electrical signals into sound waves. Loudspeakers are used in many devices, such as radios, televisions, and computers.
A microphone is a device that converts sound waves into electrical signals. Microphones are used in many devices, such as telephones, tape recorders, and computers.
An electric heater is a device that uses electricity to heat a room or object. Electric heaters are commonly used in homes and businesses.
An electric stove is a device that uses electricity to cook food. Electric stoves are commonly used in homes and businesses.
An Electric motor is a device that converts electrical energy into mechanical energy. Electric motors are used in many devices, such as fans, refrigerators, and washing machines.
An electric generator is a device that converts mechanical energy into electrical energy. Electric Generators are used to generate electricity from sources such as water, wind, and nuclear power.
Electric shock is an injury that occurs when an electric current passes through the body. Electric shock can cause burns, heart problems, and even death.
An electric fire is a fire that is caused by electricity. Electric fires can start when electrical wires or appliances overheat.
Electric power generation is the process of producing electricity from other forms of energy. Electric power generation is done by using sources such as water, wind, and nuclear power.
Electric power transmission is the process of transporting electricity from where it is generated to where it is used. Electric power transmission is done by using high-voltage power lines.
Electric power distribution is the process of delivering electricity from the power grid to homes and businesses. Electric power distribution is done by using lower-voltage power lines.
Electric waste is the waste that is produced by the use of electricity. Electric waste includes items such as old batteries, light bulbs, and appliances. Electric waste can be recycled or disposed of properly.
Electricity is a powerful force that can be used for good or evil. It is important to use electricity safely and responsibly.
What is electricity?
Electricity is a form of energy that is produced by the movement of electrons. It can be used to power devices, light homes, and transmit information.
What are the different types of electricity?
There are two main types of electricity: direct current (DC) and alternating current (AC). DC electricity flows in one direction, while AC electricity flows back and forth.
What are the benefits of electricity?
Electricity has many benefits. It can be used to power devices, light homes, and transmit information. It is also a clean and efficient form of energy.
What are the drawbacks of electricity?
Electricity can be dangerous if it is not used properly. It can also be expensive to produce and distribute.
How is electricity produced?
Electricity is produced by the movement of electrons. This movement can be caused by a variety of sources, including generators, batteries, and solar panels.
How is electricity distributed?
Electricity is distributed through a Network of power lines. These power lines carry electricity from power Plants to homes and businesses.
How is electricity used?
Electricity is used to power a variety of devices, including lights, appliances, and computers. It is also used to heat and cool homes and businesses.
What are the safety precautions for electricity?
There are a number of safety precautions that should be taken when using electricity. These include:
Never touch electrical wires that are exposed or damaged.
Always use a surge protector when plugging in electronics.
Be careful when using extension cords.
Unplug electronics when they are not in use.
What are the environmental effects of electricity?
The production of electricity can have a number of environmental effects. These include:
The future of electricity is likely to be one of increased RENEWABLE ENERGY sources. This is due to the increasing cost of fossil fuels and the growing awareness of the environmental impact of electricity production.
What is the SI unit of electric charge?
(A) Ampere
(B) Coulomb
(C) Volt
(D) Ohm
What is the force between two charged particles?
(A) Coulomb’s law
(B) Newton’s law of Gravitation
(C) Archimedes’ principle
(D) Pascal’s law
What is the electric field around a charged particle?
(A) A region of space where a charged particle experiences a force
(B) A region of space where a charged particle experiences a torque
(C) A region of space where a charged particle experiences a change in its speed
(D) A region of space where a charged particle experiences a change in its direction of motion
What is the electric potential at a point in space?
(A) The work done in moving a unit charge from infinity to that point
(B) The energy stored in a unit charge at that point
(C) The force experienced by a unit charge at that point
(D) The torque experienced by a unit charge at that point
What is the electric potential difference between two points in space?
(A) The work done in moving a unit charge from one point to the other
(B) The energy stored in a unit charge between the two points
(C) The force experienced by a unit charge between the two points
(D) The torque experienced by a unit charge between the two points
What is the current in a circuit?
(A) The rate of flow of charge
(B) The amount of charge that flows through a circuit in a given time
(C) The voltage across a circuit in a given time
(D) The resistance of a circuit in a given time
What is the voltage across a circuit?
(A) The force that drives current through a circuit
(B) The energy that is dissipated in a circuit
(C) The work that is done in moving charge through a circuit
(D) The power that is dissipated in a circuit
What is the resistance of a circuit?
(A) The opposition to the flow of current in a circuit
(B) The ratio of the voltage across a circuit to the current in the circuit
(C) The power that is dissipated in a circuit
(D) The energy that is stored in a circuit
What is the power dissipated in a circuit?
(A) The product of the voltage across a circuit and the current in the circuit
(B) The rate at which energy is dissipated in a circuit
(C) The work that is done in moving charge through a circuit
(D) The energy that is stored in a circuit
What is the energy stored in a capacitor?
(A) The product of the capacitance of the capacitor and the square of the voltage across the capacitor
(B) The work that is done in charging a capacitor
(C) The energy that is dissipated in a capacitor
(D) The power that is dissipated in a capacitor
