अंतरिक्ष में एक निश्चित बिंदु पर वैद्युत विभव (electric potential) 100 V है। उस बिंदु पर रखे 5 μC के आवेश की स्थिरवैद्युत स्थितिज ऊर्जा (electrostatic potential energy) कितनी होगी?

Two capacitors C1 and C2 are charged to 100 V and 120 V respectively. When connected together in parallel with opposite polarity plates joined together, the net common potential is found to be zero. Therefore, which relation holds true?

Point charges -3Q, -q, 2q, and 2Q are placed, one at each corner of a square. The relation between Q and q for which the electric potential at the centre of the square is zero is: