Two capacitors of capacities `100muF and 200muF` are connected in sereis. A.p.d. of 90 V is applied across them. Calculate the p..d across each capacitor.

Explanation

Data supplied,
`C_(1) =100muF", "C_(2)=200muF, " "V=90V`
Effective capacity `C_(s)=(C_(1)C_(2))/(C_(1)+C_(2))=(100 xx 200)/(300)=(200)/(3) muF`
Total charge `Q=C_(s).V=(200)/(3) xx 90=6000muC`
Hence p.d. acorss `C_(1)" is "V_(1)=Q/C_(1)=(6000muC)/(100muF)=60"volts"`
p.d. across `C_(2)" is "V_(2)=Q/C_(2)=(6000muC)/(200muF)="30 volts"`