Solving Unit Problems Made Easy: Understanding Electrical Power and Joules

[jfio93]

Homework Statement

which is unit is a unit of electrical power
v/a a/ohms a^2/ohm v^2/ohm
which unit is= to one joule
v/m a(x)v v/c c(x)v
thanks- the x is a multiplication sign

Homework Equations

The Attempt at a Solution

 

[tiny-tim]

hi jfio93!

tell us what you think, and then we'll comment

 

[jfio93]

for the first one i put v^2/ohms cause power v^2/R
the second one i put a times v

 

[tiny-tim]

hi jfio93!

for the first one i put v^2/ohms cause power v^2/R

yes, 1 V²Ω^-1 = 1 W, which is power

the second one i put a times v

1 A times 1 V is 1 W … that's not 1 J

hint: what is the definition of voltage? ​

 

[jfio93]

well can't it be used interchangeably as potential difference so i no v is there i would say v/c

 

[tiny-tim]

(just got up :zzz: …)

well can't it be used interchangeably as potential difference

yes, voltage difference and electric potential difference are the same

and electric potential is defined as … ? ​