Introduction of Electric Circuit

This includes the definition of various electrical quantities and their relationships.  

• CHARGE(q)
• CURRENT(i)
• POWER(p) 

CHARGE(q)
                 - is the physical property of matter that causes it to experience a force when placed in an   electromagnetic field.

                 - The symbol Q is often used to denote a charge.
                 - The unit of electric charge is the coulomb(c).

 Two types of electric charges

1. positive(+) charge
2.  negative(-) charge 

POSITIVE CHARGE(+)
    - having a deficiency of electrons.
    - having higher electric potential.
NEGATIVE CHARGE(-)
    - a charge that has more electrons than protons and has a lower electrical potential.

Formula for getting a charge

q = ʃ idt

 

CURRENT(i)
    - is a flow of electric charge.
    - In electric circuits this charge is often carried by moving electrons in a wire.
    - unit for measuring an electric current is the ampere.

Formula for getting current

i = dq/dt

  POWER(p)
                 -the rate at which electrical energy is transferred by a circuit.