The unit of power in SI unit is :

The unit of electric Energy :

The formula of power is :

The inscriptions of a lamp are written as (120V; 60W) means :

1 Kwatt:

The inscriptions of a lamp are written as (120V; 60W) then the rated current :

The Reading of electric meter in our homes is in :

The formula of energy is :

Joule’s effect describes the energy lost in the circuit by

The incandescent lamp produces Same light as Lead lamp then they have :

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