The solution of the problem 2.26 cr. 2 from the problem

The solution of the problem 2.26 cr. 2 from the problem

Task 2.26
The flat air condenser is charged to a potential difference of 300 V. The area of the plates is 1 cm2,
The field strength in the gap between them is 300 kV / m. Determine the surface charge density at
Plates, capacitance and energy of the capacitor.