A point charge of is fixed on the x-axis at

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

Problem

A point charge of

+6.0\,\mu\text{C}

is fixed on the x-axis at

x=+0.10\,\text{m}

. A second point charge

Q

is fixed on the x-axis at

x=-0.20\,\text{m}

. If the net electric field at the origin is zero, what is the value of

Q

? (a)

-24\,\mu\text C

(b)

+12\,\mu\text C

(c)

+24\,\mu\text C

(d)

+1.5\,\mu\text C