two parallel plate capacitors of capacitances c1 c2 such that 2c2=c1 are connected across a battery of V volts - Physics - Electrostatic Potential And Capacitance

Question

two parallel plate capacitors of capacitances c1& c2 such that
2c2=c1 are connected across a battery of V volts initially key (k)
is kept closed to fully charge the capacitors the key is now thrown
open and a dielectric slab of k is inserted in the two capacitors
to completely fill the gap between the plates find the ratio of
1the net capacitances and 2 the energy stored in the combination ,
before and after the introduction of dielectric slab

Shreya Banerjee · Answer

can you pls tell us how is it connected i mean in parallel or in
series ??