Question

write two points of difference between electric energy and electric power

Answer 1

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Answer 2

"Electrical energy:

• The energy supplied by the source in maintaining the flow of electric current is called electrical energy. It appears in the form heat.
•   The equation is given by $H\quad =\quad VIt\quad =\quad \frac { V^{ 2 }t }{ R } \quad =\quad I^{ 2 }RT$
•   Electrical energy is equal to the product of power and time
•  $E\quad =\quad P\quad \times \quad t$
•   The SI unit of “electrical energy” is Joule
•  $1J\quad =\quad 1W\quad \times \quad 1s$

Electrical power:

•   The time rate at which the “electric energy” is “consumed” by an “electrical device” is called “electrical power”.
•   It is notated as $P\quad =\quad VI\quad =\quad \frac { V^{ 2 } }{ R } \quad =\quad \frac { I^{ 2 } }{ R }$
•   Electrical power is equal to the rate of doing work divided by energy source
•   $P\quad =\quad \frac { W }{ I }$  
•   Electrical power's SI unit is watt.
• $1W\quad =\quad 1J/s$"