Four condensers each of capacity 4μF are connected as shown in figure. VP-VQ=15volts . The energy stored in the system is [CPMT 1976, 89]
2400ergs
1800ergs
3600ergs
5400ergs
Resistances of 6 ohm each are connected in the manner shown in adjoining figure. With the current ampere as shown in figure, the potential difference VP−VQ is
Three condensers of capacity 4μF, 2μF and 3μF are connected such that 2μF and 3μF are in series and 4μF is parallel to them. The equivalent capacity of the combination is