##Ex12.6.1.;calculate open circuit voltage and maximum power output
B=2;##flux density;unit=Wb/m^2
u=10**3;##average gas velocity;unit=m/second
d=0.50;##distance between plates;unit=m
E0=B*u*d;##Open ccircuit voltage
print'%s %.2f %s'%(" Open ccircuit voltage E0=",E0," Volts");
##Generator resistance; Rg=d/sigma*A
sigma=10;##Gaseous conductivity;unit=Mho/m
A=0.25;##Plate Area;unit=m^2
Rg=d/(sigma*A);
print'%s %.2f %s'%("\n Generator resistance Rg=",Rg," Ohm");
##Maximum power
Maximum_power=(E0**2)/(4.*Rg);
print'%s %.2f %s'%("\n Maximum_power=",Maximum_power," watts");