The correct option is C Ratio of rate of heat generation across r1 and r2 at t = RC is 9 : 2.
τ1=τ2=2RC
and q1=3εC(1−e−tτ)
q2=2εC(1−e−tτ)
i1=dq1dt=3ϵe−tτ2R
i2=dq2dt=ϵe−tτR
∴q1q2=32
hence, i1i2=32
Now, (Heat)1(Heat)2=(i1i2)2r1r2=92
The ratio of energies : U1U2=(q1q2)2C2C1=(32)2×2CC=92