दो आवेशों के बीच का बल 200 न्यूटन है। यदि आवेशों के बीच की दूरी को दोगुना कर दिया जाए, तो बल किसके बराबर होगा?

Consider two uncharged capacitors of equal capacitance 200 pF. One of them is charged by a 100 V supply and disconnected. Now this capacitor is connected to the uncharged capacitor. The amount of electrostatic energy lost in the process is:

Four capacitors C1 = C2 = C3 = C4 = 10 μF are connected in a bridge network, and a fifth capacitor C5 = 2.5 μF is connected across the bridge terminals with a 50 V battery attached. The equivalent capacitance and the charges on each capacitor respectively are: