Three equal point charges of are fixed at three vertices of a square of side

PHYSICS · Single correct · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Three equal point charges of

+5.0\,\mu\text{C}

are fixed at three vertices of a square of side

0.20\,\text{m}

. The fourth vertex is left vacant. What is the magnitude of the net electric field at the centre of the square? (Take

k = 9.0\times10^{9}\,\text{N\,m}^{2}\text{C}^{-2}

.) (a)

0

(b)

4.50\times10^{6}\,\text{N\,C}^{-1}

(c)

1.13\times10^{6}\,\text{N\,C}^{-1}

(d)

2.25\times10^{6}\,\text{N\,C}^{-1}