Question

what is electcity , diffine fully ...​

Answer 1

Answer:

Electricity is the flow of electrical power or charge. It is a secondary energy source which means that we get it from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power and other natural sources, which are called primary sources.

Explanation:

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Answer 2

Answer

Electric Current is the rate of flow of electrons in a conductor. The SI Unit of electric current is the Ampere.

Conductors: These materials allow the free flow of electrons from one particle to another. Conductors allow for charge transfer through the free movement of electrons. The flow of electrons inside the conducting material or conductor generates an electric current. The force that is required to drive the current flow through the conductor is known as voltage.

Examples of conductors: Human body, aqueous solutions of salts and metals like iron, silver and gold.

Did you know?

Silver is the best conductor of electricity.

Insulators: Insulators are materials that restrict the free flow of electrons from one particle to another. The particles of the insulator do not allow the free flow of electrons; subsequently, charge is seldom distributed evenly across the surface of an insulator.

Examples of Insulator: Plastic, Wood and Glass

What is an Electromotive Force?

The motion of free electrons is normally haphazard. If a force acts on electrons to make them move in a particular direction, then up to some extent random motion of the electrons will be eliminated.

Unit of Electric Current

The magnitude of electric current is measured in coulombs per second. The SI unit of electric current is Ampere and is denoted by the letter A. Ampere is defined as one coulomb of charge moving past a point in one second. If there are 6.241 x 1018 electrons flowing through our frame in one second then the electrical current flowing through it is ‘One Ampere.’

Current

It is flow of charge per unit time .

$\tt{current = \frac{charge}{time}}$

Properties of Electric Current

Electric current is an important quantity in electronic circuits.

• There must be source of potential difference. Without the applied voltage, current cannot flow through the circuit.
• There must be a complete path for the current flow. ...
• The external circuit is generally resistive.

Effects of Electric Current

When a current flows through a conductor, there are a number of signs which tell if a current is flowing or not.

Heating Effect of Electric Current

When our clothes are crumpled, we use the iron box to make our clothes crisp and neat. Iron box works on the principle of heating effect of current.

When an electric current flows through a conductor, heat is generated in the conductor.

The heating effect is given by the following equation :

H=I²RT