# AQA A-level Physics (Capacitance) - Concept of Capacitance

Watch
Announcements
#1
When I was reading about capacitance in the AQA textbook in which there was a circuit given with the components of a switch , a capacitor , a variable resistor , ammeter in series and voltmeter in parallel across the capacitor.

When observing the relationship between Charge and Potential difference when current was constant ,[ I couldn't understand why the Potential difference was increasing while the charge was increasing for the capacitor.]

Is it alright if someone could explain why the potential difference increases while charge increases at a constant current?
0
3 years ago
#2
It's mainly to do with the capacitance equation Q=CV (or C=Q/V if you prefer it that way). The capacitance of any component is fixed therefore as if Charge (Q) increases then voltage must also increase by the same amount in order to maintain the same capacitance.
1
#3
(Original post by wannabe_lawyer)
It's mainly to do with the capacitance equation Q=CV (or C=Q/V if you prefer it that way). The capacitance of any component is fixed therefore as if Charge (Q) increases then voltage must also increase by the same amount in order to maintain the same capacitance.
omg.. something so simple to understand. XD

thanks mate
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### Current uni students - are you thinking of dropping out of university?

Yes, I'm seriously considering dropping out (147)
14.54%
I'm not sure (43)
4.25%
No, I'm going to stick it out for now (303)
29.97%
I have already dropped out (26)
2.57%
I'm not a current university student (492)
48.66%