At what distance from a point charge will the magnitude of the electric field become…

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

Problem

At what distance from a point charge will the magnitude of the electric field become one-fifth of its value at

0.10\,\text{m}

from the charge? (a)

0.045\,\text{m}

(b)

0.45\,\text{m}

(c)

0.22\,\text{m}

(d)

0.020\,\text{m}