An isolated point charge is fixed at the origin

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

An isolated point charge

-4.0\,\mu\text{C}

is fixed at the origin. Determine the electric field at the point

(0.10\,\text{m},\,0)

on the positive

x

-axis. (a)

3.6\times10^{6}\,\text{N/C}

along

+\hat i

(b)

7.2\times10^{6}\,\text{N/C}

along

-\hat i

(c)

3.6\times10^{6}\,\text{N/C}

along

-\hat i

(d)

9.0\times10^{5}\,\text{N/C}

along

-\hat i