class 12 cbse curriculum.
in the combination of parallel plate capacitors, series arrangement, my student does not understand that when the left most plate (1st plate of 1st capacitor) is attached to the postive terminal of the battery, it gets a charge of +Q, and the right most plate (2nd plate of last capacitor)attached to the negative terminal, gets a charge of -Q. He says that getting a potential is fine, but how does the plate acquire charge? He asked that whether the circuit is complete or not, whether current is flowing or not. if current is not flowing, plate cannot acquire charge.. how do i explain?
well, intially when uncharged the capacitor behaves as a short circuit and cureent flows through it but once fully charged it behaves as an open circuit and current stops flowing . Thus they get charged and while charging current flows in circuit......
sir u mean to say that
Initially when battery is connected there is no potential difference across capacitor and all potential difference is across the connecting wire ?? i guess the word "no" is missing in ur post?
I might also add that you could have your student look at it in such a way that as the current flows from the battery's positive terminal and across the capacitor, the left most plate acquires a positive charge. This positive charge causes negative charges to attract to it, thus causing a build up of negative charge on the opposite plate. This happens until the capacitor reaches maximum charge and (like the others said) current stops.
Preparing for JEE?
Kickstart your preparation with new improved study material - Books & Online Test Series for JEE 2014/ 2015
@ INR 5,443/-
For Quick Info
Find Posts by Topics