Capacitance

Question 1

what is capacitance

Answer 1

charge stored per unit p.d. across it

Question 2

how do capacitor plates acquire an equal but opposite charge when a circuit is complete

Answer 2

• electrons repelled from negative terminal
• deposited on one of the capacitor plates and repelled from the other
• same number of electrons deposited as removed, causing the plates to obtain equal but opposite charges

Question 3

explain in terms of movement of electrons how the p.d across the capacitor changes

Answer 3

• electrons move from negative terminal
• deposited at capacitor and repels electrons on the other plate of the capacitor
• one side is now positive and the other is negative meaning voltage increases exponentially