Question

5) Three capacitors, all initially without any dielectrics inserted, of C1 = 2 micro-farads, C2 = 7 micro-farads, and C3 = 11 micro-farads, are connected purely in series to a battery and the total stored energy of all three capacitors is 208 micro-joules. Then, the plates of C1 are brought closer by a factor of 2 and a dielectric with a dielectric constant of 1.8 is inserted into C2 while still connected in series to the same battery. (C3 does not change at all.) How much does the total stored energy of all three capacitors increase in micro-joules after the capacitors are changed? Not the factor change... how much does the stored energy go up in value.

Answer 1

answer energy stored in the new combination is 364micro joule Or 3.64x10pow-4J

Increase in energy =156micro joule