Physics

Problem

+5\,\mu\text{C}

point charge is fixed at

x=0

, and a

-20\,\mu\text{C}

point charge is fixed at

x=0.25\,\text{m}

on the same line. Where, relative to the

+5\,\mu\text{C}

charge, can a small positive test charge be placed so that the net electric field is zero? a)

0.25\,\text{m}

on the side of the

+5\,\mu\text{C}

charge opposite the

-20\,\mu\text{C}

charge b)

0.083\,\text{m}

between the two charges c)

0.25\,\text{m}

beyond the

-20\,\mu\text{C}

charge on the far side d)

0.50\,\text{m}

on the side of the

+5\,\mu\text{C}

charge opposite the

-20\,\mu\text{C}

charge