4. Calculate the number of ion pairs produced by an electron with kinetic energy of 1.0 MeV passing through a 30 mm thick ionization chamber. What is the total charge of electrons? If a hundred such particles pass through the chamber each second and all the ions are collected at the electrodes what is the total current? (The density of the gas is 1.3 kg/m³, the mass stopping power for air for 1.0 MeV is 1.67 MeV/(g/cm²) and it takes about 34 eV to produce an ion pair in air).

4. Calculate the number of ion pairs produced by an electron with kinetic energy of 1.0 MeV passing through a 30 mm thick ionization chamber. What is the total charge of electrons? If a hundred such particles pass through the chamber each second and all the ions are collected at the electrodes what is the total current? (The density of the gas is 1.3 kg/m³, the mass stopping power for air for 1.0 MeV is 1.67 MeV/(g/cm²) and it takes about 34 eV to produce an ion pair in air).