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
 positive(+) charge
 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 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.