I am having trouble with the following question:

View attachment tut4qns.doc

For the first question i got the answers for a) however the energy for the 20 and 40 micro ohms capacitors are incorrect.

This is what i did:

sub 0.5 into the equations that i got for a) and i get

v1 = 840.150v

v2 = 208.030v

w_12 = 0.5 * (12 * 10^-9) * v1^2

=4.23J

w_20 = 0.5 * (20 * 10^-9) * v2^2

=0.424J

w_40 = 0.5 * (40 * 10^-9) * v2^2

=0.866J

Question 2 how would i start it?

P.S