Two capacitors of capacitance 1 μF and 2 μF are charged to potential difference 20 V and 15 V as shown in figure. If now terminal B and C are connected together while terminal A is connected with positive terminal of battery and terminal D of capacitor connected with negative terminal of battery with an emf 30 V.
The final charges on 1 μF and 2 μF capacitors respectively will be;
Why this question? Tip:In questions involving two capacitors and a battery connected in parallel with them, either we can apply KVL in loop orΣΔVcapacitor=ΔVBattery i.e., V1+V2=VBattery Caution: While traversing in a closed loop, always follow one convention. If we consider crossing from +ve plate of capacitor to -ve plate, it can be given negative sign if potential drop is considered negative throughout. |