× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
e
4
h
4
h
4
m
3
d
3
B
3
o
3
w
3
H
3
a
3
c
3
k
3
Home Q & A Board Science-Related Homework Help Physics
New Topic  
lferus lferus
wrote...
Posts: 29
Rep: 0 0
12 years ago
whether watt can be calculated from ampere?
Read 490 times
4 Replies

Related Topics

Replies
wrote...
#1
12 years ago
yes, if you know the voltage watt = volts times amp
if you know the resistance watt = volts^2 / ohms
wrote...
#2
12 years ago
Yes. We can.But it is necessary to know about either the current or the value of the load.Here are some equations :
                      Power=voltage*current
                      Power=current^2*resistance
                      Power=voltage^2/resistance
this all equations are true in the case of D.C. current.For more information go on this website:
RJW
wrote...
#3
12 years ago
Yes if you also know the circuit`s resistance value.
Watts = (Amps^2)*(resistance)

Yes, if you also know the Voltage and power factor.
Watts = (Amps)*(Volts)*(power factor)

No,if Amperes is all that is given
wrote...
#4
12 years ago
No, if it's a sinusoidal AC circuit you need to know the voltage and power factor.  If it is an AC circuit that is not sinusoidal, it is even more difficult.  If it's a DC circuit you only need to know the voltage.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1093 People Browsing
 153 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 197
  
 24
  
 139
Your Opinion
What's your favorite funny biology word?
Votes: 336
Previous poll results: Which industry do you think artificial intelligence (AI) will impact the most?