Abstract: The distributions of electric potential and shell are calculated by using the conformal mapping on that the equation of equipotential lines and electric lines plotted by using the software MATLAB. Further,its capa electric field intensity inside the condenser of half cylinder the coordinate system of complex number. It is concluded of force as well as electric field and equipotential lines are city is calculated.

Key words: condenser of half cylinder shell, conformal mapping, electric potential distribution, electric field intensity distribution, capacity