Physics

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

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

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

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