# Force between plates of a capacitor

**Electricity and Magnetism**Level 5

Find the force exerted on one plate by the other one in Newtons.

**Details and Assumptions**:

1) \(l = 1 \text{ mm} , \sigma = 12.634 \times 10^{-3} \text{ C/m}^{2}\)

2) \({\epsilon}_{0} = \text{ Permittivity of vaccum} = 8.85 \times 10^{-12} \)

**Extra Credit**:

1) Find it's closed form, that is find the expression without putting the values.

2) Double credit : Solve for the closed form by hand. Without use of any computer.

3) Triple Credit-Post Solution. One who post complete solution wins my respect.