Top Posters
Since Sunday
c
5
j
5
a
5
L
5
f
5
j
5
D
4
k
4
y
4
t
4
h
4
l
4
Home Q & A Board Science-Related Homework Help Physics
New Topic  
_biology _biology
wrote...
Go to Answer
11 years ago
A capacitor is connected across an ac source that has voltage amplitude 58.0 V and frequency 75.5 Hz.
Part A: What is the phase angle  for the source voltage relative to the current?
Part B: Does the source voltage lag or lead the current?
Part C: What is the capacitance C of the capacitor if the current amplitude is 5.55 A?
Read 519 times
2 Replies
Replies
Answer accepted by topic starter
finallyfinally
wrote...
#1
Posts: 12
Rep: 0 0
11 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

wrote...
#2
11 years ago
a,b)  If the series resistance in the circuit is negligeable, the voltage lags the current by 90deg.

c) I = V*B = V*C*2*pi*f where B is the susceptance of the cap (reciprocal of reactance; B = 1/X)

C = I/(V*2*pi*f) = 302.7uF
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  843 People Browsing
 131 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 723
  
 397
  
 301
Your Opinion
Where do you get your textbooks?
Votes: 422
Previous poll results: Do you believe in global warming?