Question

Directions: Answer the following questions. Show your solutions.

1. If static force is144 N, what is the distance between both charges given that charge 1 is 10μC and charge 2 is 4μC?

2. Two charges separated by a distance of r. if the static force is 3.6N, what is the distance between q1=9μC and q2=4μC.

3. How much force is experienced by the 5nC charge due to the other charges, if there are 3 charges; q1=5nC, q2=-9nC, q3=4nC are placed at the vertices of an equiangular triangle with a side measuring 15cm.

Answer 1

1. The distance is

$$R=\sqrt{kq_1q_2/F}=0.05\text{ m}.$$

2. The distance is

$$R=\sqrt{kq_1q_2/F}=0.3\text{ m}.$$