Two identical charges are placed at the two corners of an equilateral triangle. The potential energy of the system is U. The work done in bringing an identical charge from infinity to the third vertex is

Two identical charges are placed at the 2 vertices of an equilateral triangle. The potential energy of the system is u. The work done in bringing an identical charge from infinity to third vertex is ....(a)u (b)2u (c)3u (d)4u

Three charges each 20muC are placed at the corners of an equilateral triangle of side 0.4m The potential energy of the system is

Three point charges 3nC, 6nC and 9nC are placed at the corners of an equilateral triangle of side 0.1m. The potential energy of the system is:

Three point charges 3nC, 6nC and 6nC are placed at the corners of an equilateral triangle of side 0.1 m. The potential energy of the system is

Four identical point charges q are placed at four corners of a square of side a. Find the potential energy of the charge system. .

Four identical point charges q are placed at four corners of a square of side a. Find the potential energy of the charge system. .

Three point charges each equal to q are placed on the vertices of an equilateral triangle of side l. The potential energy of the system is

Three equal charges Q are placed at the three corners of an equilateral triangle of side length a. Work done in shifting a charge q from infinity to the centroid of the triangle is