Answer:
0.9 N
Explanation:
The electric force, F, is the product of the electric field strength, E, and the charge i.e.
[tex]F = E\cdot Q[/tex]
From the question,
[tex]E = 2.0\times 10^4\text{ N/C}[/tex]
[tex]Q = 4.5\times10^{-5}\text{ C}[/tex]
[tex]F = (2.0\times10^4\text{ N/C})(4.5\times10^{-5}\text{ C}) = 9.0\times10^{-1}\text{ N} = 0.9\text{ N}[/tex]
