`ABC` is an equilateral triangle. Charges `+q` are placed at each corner. The electric intensity at `O` will be

ABC is an equilateral triangle. Charges -2q are placed at each corner. The electric intensity at O will be

ABC is an equilateral triangle. Charges -2q are placed at each corner. The electric intensity at O will be

ABC is an equilateral triangle. Charges +q are placed at each corner. The electric field intensity at the centroid of triangle will be

ABC is an equilateral triangle. Charge +q is placed at each corner. The electric field intensity at point 0 will be

ABC is an equilateral triangle. Three identical charges each +q are placed at each corner. Electric intensity at the centroid of triangle is

ABC is equilateral triangle of side 1m. Charges are placed at its corners as shown in fig. O is the mid- point of side BC the potential at point (O) is-

Three charges each of value q are placed at the corners of an equilateral triangle. A fourth charge Q is placed at the centre of the triangle. If Q = -q :

Three charges, each of value q, are placed at the corners of an equilateral triangle. A fourth charge Q is placed at the centre O of the triangle. (a) If Q = -q , will the charges at corners starts to move towards centre of away from it. (b) For what value of Q at O will the charges remain stationary ?