how the capacitor store energy
capacitor
- Thread starter TAKYMOUNIR
- Start date
....Is that the whole question? Having over 200 posts, I expected you'd have learned by now that we need fully-worded, clear questions in order to give good answers.
Anyway, capacitors do not store energy. Simple as that. Instead, they store charge.
There's a nice little write-up here: http://www.physics.sjsu.edu/becker/physics51/capacitors.htm
Anyway, capacitors do not store energy. Simple as that. Instead, they store charge.
There's a nice little write-up here: http://www.physics.sjsu.edu/becker/physics51/capacitors.htm
I think my question is clear ,any way thanks,but the capacitor store energy=1/2 cv^2
That would seem to an overly restrictive definition.
Capacitors actually store both, of course. They store energy by storing charge as determined by the voltage applied to transfer the charge.
I stand corrected.That would seem to an overly restrictive definition.
Capacitors actually store both, of course. They store energy by storing charge as determined by the voltage applied to transfer the charge.
Not quite. Charge, voltage and capacitance are all inter-related, much like Ohm's Law.
\(V = \frac{Q}{C}\)
Hence the energy stored in a capacitor of a given capacitance C can can be determined entirely from charge Q,
\(E = \frac{1}{2}\frac{Q^2}{C} \)
or from voltage V,
\(E = \frac{1}{2}CV^2 \)
\(V = \frac{Q}{C}\)
Hence the energy stored in a capacitor of a given capacitance C can can be determined entirely from charge Q,
\(E = \frac{1}{2}\frac{Q^2}{C} \)
or from voltage V,
\(E = \frac{1}{2}CV^2 \)
Yup, I remember seeing that before, specifically the last one. Not really sure what I was thinking.
Guess it's been too long since I did any math relating to electronics!
