capacitors

Question 1

capacitors are used to provide

Answer 1

energy really quickly (e.g. flash of a camera)

Question 2

capacitors are used to reduce

Answer 2

variation in the voltage of d.d. electrical supplies

Question 3

in a d.c. circuit, the p.d. across a charged capacitor is always in the

Answer 3

opposite direction to the supply voltage

Question 4

the energy stored in a charged capacitor is equal to:

Answer 4

the total work done in overcoming electrical forces during charging
+
the area under the charge (y-axis) versus p.d. (x-axis) graph

Question 5

the relationship between energy stored, charge transferred and fully charged voltage is

Answer 5

E = 1/2 QV