Definition: Physical phenomenon associated with electric charge. Electricity finds applications in modern technologies like in electronics that deals with electric circuits and electric power to charge the equipment. Unit of electricity is kilowatt hour which is represented as kWH.
There are various concepts that work on the basis of electricity. They are:
- Electric charge: Matter that experiences a force when placed in an electromagnetic field is known as electric charge. These are of two types: positive (protons) and negative (electrons)
- Electric current: Movement of electric charge is known as electric current. Unit of electric current is amperes. Movement of electric current happens through electric conductors and not through electric insulators.
- Electric field: Electric field can be defined as the force exerted by electric charge making it attractive or repulsive in nature. SI unit of an electric field is Newton per Coulomb (N/C).
- Electric potential: Amount of work done to move a unit positive charge from one point to other is known as electric potential.Volt is the unit of electric potential.
- Electromagnets: When the electric field is used to produce a magnetic field, such magnets are known as electromagnets. The advantage of electromagnets is that magnetic field can be controlled by controlling the flow of electric current.
- Electric circuits: the closed loops that are responsible for the completion of the electric current flow. Electric components like inductors, batteries, switches, capacitors and resistors are used to build electric circuits.
- Electronics: Electronics involves a study of physics, technology, engineering and applications of these.
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