Two point charges

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential

Problem

Two point charges,

q_1 = -6.0\,\mu\text{C}

and

q_2 = +3.0\,\mu\text{C}

, form a system whose electric potential energy is

-0.81\,\text{J}

. What is the separation

r

between the charges? (a)

0.45\,\text{m}

(b)

0.10\,\text{m}

(c)

0.20\,\text{m}

(d)

0.27\,\text{m}

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