Problem

A point charge

q_1 = 4.00 \text{ nC}

is placed at the origin, and a second point charge

q_2 = -3.00 \text{ nC}

is placed on the

x

-axis at

x = +20.0 \text{ cm}

. A third point charge

q_3 = 2.00 \text{ nC}

is placed on the

x

-axis between

q_1

and

q_2

. (Take as zero the potential energy of the three charges when they are infinitely far apart). a. - What is the potential energy of the system of the three charges if

q_3

is placed at

x = +10.0 \text{ cm}

? b. - Where should

q_3

be placed to make the potential energy of the system equal to zero?

Browse the problem library