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
Avsek T.
Jun 9, 2018

4.90867474 #*10^-26#Newton

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^-23#Newton

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

anantha n.
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

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