A test charge experiences a force of when it is from a point charge

PHYSICS · Single correct · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

+4.0\,\mu\text{C}

test charge experiences a force of

2.4\times10^{-4}\,\text{N}

when it is

0.30\,\text{m}

from a point charge

Q

. What is the magnitude of

Q

? (Take

k = 9.0\times10^{9}\,\text{N\,m}^2/\text{C}^2

.) (a)

6.0\times10^{-7}\,\text{C}

(b)

2.0\times10^{-9}\,\text{C}

(c)

6.0\times10^{-10}\,\text{C}

(d)

-6.0\times10^{-10}\,\text{C}