equation for power

captaincaveman

New Member

• Sep 6, 2006

• #1

hi, Quick question. whats the other equations for power in electronics except:

P=VI

isnt there one with Isquared?


thanks

 

OutToLunch

New Member

• Sep 6, 2006

• #2

V=I*R

Substitute I*R for the V in P=V*I and you Get P=I*I*R or (I^2)*R

I=V/R, do the same kind of thing and P=(V^2)/R

 

Hero999

Banned

• Sep 6, 2006

• #3

**broken link removed**

 

captaincaveman

New Member

• Sep 6, 2006

• #4

thanks guys, hero999 that things excellent thankyou loads. that answers so many questions in one go

thanks again

 

Papabravo

Well-Known Member

Most Helpful Member

• Sep 6, 2006

• #5

Easier to remeber is:

Twinkle-twinkle little star
Power's equal I squared R

 

dknguyen

Well-Known Member

Most Helpful Member

• Sep 6, 2006

• #6

You could also remember the word PIV and VIR. Much shorter.

 

RODALCO

Well-Known Member

• Sep 7, 2006

• #7

Interesting always the differences in the quotation for volts.

In the Netherlands U stands for volts
In English countries V or E stands for volts.

While I is standard for Amps worldwide
and P for Power in Watts

 

captaincaveman

New Member

• Sep 7, 2006

• #8

yeah but that gif helps with all sorts if you know the power and voltage you can find current etc theres so many in there. wish i'd had that before