logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
0 votes

If capacitor is changed from 0 to 20 v using constant current. Variation in energy U of capacitor with time t will be

Can you answer this question?
 
 

1 Answer

0 votes
At any instant,
$q= q_0 (1-e^{-t/RC})$
and $V= V_0 (1-e^{t/RC})$
$U= \large\frac{1}{2} $$CV^2$
$\quad=> \large\frac{1}{2} q_0$$ V_0^2 (1-e^{-t/RC})^2$
Hence U varies exponentially with time.
Hence A is the correct answer.
answered Jan 3, 2014 by meena.p
edited Apr 19 by meena.p
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...