Capacitors

Question 1

Capacitor

Answer 1

A component that stores energy by separating charges into two electrical conductors with an insulator between them

Question 2

Capacitance

Answer 2

The quantity of charge which can be stored per unit potential difference across the plates

Question 3

Once a capacitor is fully charged

Answer 3

No more charge will flow in the circuit since the electrons on the negatively charged plate will repel further electrons away

Question 4

Capacitors in series

Answer 4

1/total capacitance = 1/sum of individual capacitors

Question 5

Capacitors in parallel

Answer 5

Total capacitance = sum of individual capacitors

Question 6

Area under a voltage - charge graph

Answer 6

The work done as WD = 1/2 * Q * V

Question 7

In exponential decay

Answer 7

The quantity decreases at a rate that is proportional to the magnitude of the quantity at that time. X = x.e^-kt

Question 8

The time constant

Answer 8

The time taken for the charge remaining on a capacitor to decrease to 1/e, 37% of its original value.