These questions are guide lines for the oral work.

a) Give the composition and unit of cpacitors.

b) Give the value of voltage uC when t = 0.

c) Voltage uC against time is a straight line with a positive slope when t is between 0 and 20 s. Why ?

d) Voltage uC against time remains constant when t isbetween 20 and 40 s. Why ?

e) Voltage uC against time is a straight line with a negative slope when t is between 40 and 60 s. Why ?

f) How do you know that the capacitor is completely discharged ?