The distance between two point charges + 1 · 10⁻⁷C and -5 · 10⁻⁸C is equal to 10 cm With what force do they interact?

Given:

q1 = + 1 * 10 ^ -7 Cl;

q2 = – 5 * 10 ^ -8 C;

r = 10 cm = 0.1 m.

To find:

F -?

Decision.

F = k * (| q1 | * | q2 |) / r2, where k is a quantity that has a constant value k = 9 * 109 N * m2 / Cl2.

F = 9 * 10 ^ 9 * 1 * 10 ^ -7 * 5 * 10-8 / (0,1) ^ 2;

F = 45 * 10 ^ 9 * 10 ^ -7 * 10 ^ -8 / 0.01;

F = 45 * 10 ^ (9-7-8) / 0.01;

F = 45 * 10 ^ -6 / 10-2;

F = 45 * 10 ^ -6 – (- 2);

F = 45 * 10 ^ -4 N or F = 0.0045 N.

Answer: 0.0045 N.