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# Basic of Electrical Circuits

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Basic of circuit

Charge
Charge is an electrical property of the atomic particles which matter consists.
The unit of charge is the coulomb (C).
The symbol for the charge is Q (or) q.

ퟏ풄풐풖풍풐풎풃=ퟏ/(ퟏ.ퟔퟎퟐ×〖ퟏퟎ〗^(−ퟏퟗ) )=ퟔ.ퟐퟒ× 〖ퟏퟎ〗^ퟏퟖ 풆풍풆풄풕풓풐풏풔

Types of charge

Positive charge
Negative charge

A single electron has a charge of -1.602x10-19 c.
A single proton has a charge of +1.602x10-19 c.

Current
The flow of free electrons in a conductor is called electric current.
The electric current is defined as the time rate of charge.
The unit of current is the ampere (A).
The symbol for the current is I (or) i.
1ampere=1coulomb/second

Voltage
The potential difference between two points in an electric circuit called voltage.
The unit of voltage is volt.
Voltage is represented by V (or) v.

Power
The rate at which work done by electrical energy (or) energy supplied per unit time is called the power.
Power is the rate at which energy is expanded or the absorbing.
The power denoted by either P or p.
It is measured in watts (W). P = V x I

Network
Interconnection of two or more simple circuit elements is called an electric network.

Circuit
A network contains at least one closed path, it is called electrical circuit.

Active Elements
The sources of energy are called active element. They may be voltage source or current source.
Example:
Generators, Transistors, etc.

Passive Elements
These elements stores (in the form of electrostatic, electromagnetic energy) or dissipates energy (in the form of heat).
Example:
Resistance (R), Inductor (L), Capacitor (C).

Resistance
It is the property of a substance which opposes the flow of current through it.
The resistance of element is denoted by the symbol “R”.
It is measured in Ohms (Ω).

Inductor
It is the property of a substance which stores energy in the form of electromagnetic field.
The inductance of element is denoted by the symbol “L”.
It is measured in Henry (Η).

Capacitor
It is the property of a substance which stores energy in the form of electrostatic field.
The capacitance of element is denoted by the symbol “C”
It is measured in Farads (Ϝ).

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### Basic of Electrical Circuits

1. 1. BASIC OF CIRCUIT
2. 2. Charge ■ Charge is an electrical property of the atomic particles which matter consists. ■ The unit of charge is the coulomb (C). ■ The symbol for the charge is Q (or) q. 𝟏𝒄𝒐𝒖𝒍𝒐𝒎𝒃 = 𝟏 𝟏. 𝟔𝟎𝟐 × 𝟏𝟎−𝟏𝟗 = 𝟔. 𝟐𝟒 × 𝟏𝟎 𝟏𝟖 𝒆𝒍𝒆𝒄𝒕𝒓𝒐𝒏𝒔 KGB 2
3. 3. Types of charge 1. Positive charge 2. Negative charge ■ A single electron has a charge of -1.602x10-19 c. ■ A single proton has a charge of +1.602x10-19 c. KGB 3
4. 4. Current ■ The flow of free electrons in a conductor is called electric current. ■ The electric current is defined as the time rate of charge. ■ The unit of current is the ampere (A). ■ The symbol for the current is I (or) i. 1ampere=1coulomb/second KGB 4
5. 5. Voltage ■ The potential difference between two points in an electric circuit called voltage. ■ The unit of voltage is volt. ■ Voltage is represented by V (or) v. KGB 5
6. 6. Power ■ The rate at which work done by electrical energy (or) energy supplied per unit time is called the power. ■ Power is the rate at which energy is expanded or the absorbing. ■ The power denoted by either P or p. ■ It is measured in watts (W). P = V x I KGB 6
7. 7. Network Interconnection of two or more simple circuit elements is called an electric network. Circuit A network contains at least one closed path, it is called electrical circuit. KGB 7
8. 8. Active Elements The sources of energy are called active element. They may be voltage source or current source. Example: Generators, Transistors, etc. KGB 8
9. 9. Passive Elements These elements stores (in the form of electrostatic, electromagnetic energy) or dissipates energy (in the form of heat). Example: Resistance (R), Inductor (L), Capacitor (C). KGB 9
10. 10. Resistance ■ It is the property of a substance which opposes the flow of current through it. ■ The resistance of element is denoted by the symbol “R”. ■ It is measured in Ohms Ω . KGB 10
11. 11. Inductor ■ It is the property of a substance which stores energy in the form of electromagnetic field. ■ The inductance of element is denoted by the symbol “L”. ■ It is measured in Henry Η . KGB 11
12. 12. Capacitor ■ It is the property of a substance which stores energy in the form of electrostatic field. ■ The capacitance of element is denoted by the symbol “C” ■ It is measured in Farads Ϝ . KGB 12
13. 13. THANK YOU KGB 13