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chicagobears34
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Homework Statement
Suppose a free electron in air is 1.1cm away from a point charge. What minimum charge must this point charge have to cause a breakdown of the air and create a spark?
I already have the Electric field and force, which I solved to be
E=7.2x10^6 N/C
F=1.2x10^-12 N
Homework Equations
F=(k*q1*q2)/r^2
f=Eq
The Attempt at a Solution
I tried using F=kq1q2 / r^2 and plugging in .011m in as r and then using q1=q2=charge of electron.
Then I did F=Eq and solved for q but i did not get the correct answer.
How should I be approaching this problem?