Question

Is there any lower limit to the electric force between two particles placex at a separation of 1 cm. Explain your answer

Answer 1

Yes !! there is a lower limit to the electric force between 2 particles placed at a separation of 1 cm.
We know that force ( say F) between two charged particles ( having charges q and Q ) separated by a distance of r is given by :
F = kQq/r²
To find the lower limit we have to assume the charge on the both of the particles lowest possible ; And the quantum of charge is still the charge on an electron ( say e) .
=> lower limit of force in our case is :
F = ke²/r²
here r is 1cm = 0.01 m
k= 9×10^9 N-m²/C²
=>
F ( lowest possible) = 2.3×10^-24 N