Assume that in interstellar space the distance between two electrons is about 0.47 cm. What is the electric force between the two electrons?

2 Answers
Jun 9, 2018

4.90867474 *10^-26Newton

Explanation:

What is the medium in interstellar space?
It is vacuum obviously. And thus the permittivity is always epsilon_0 which is equal to 8.854187817*10^-12 farads per meter.

Now,
Electric force between two electrons, let F;
F ={1/(4*pi*epsilon_0)*(q^2)/(r^2)} = {1/(4*pi*epsilon_0)*(e^2)/(4.7*10^-3)^2} = 4.90867474 *10^-23Newton

As the charges are both negative they keeps the tendency to repel each other.

Jun 9, 2018

1.04 * 10^-23 N

Explanation:

the electric force is given by (k *q_1*q_2)/r^2

Here , q_1 and q_2 are same and equal to e
The distance of separation is 0.0047 m and the value of k
is 9*10^9

So , Electric force = 1.04 * 10^-23 N